TECHNICAL REPORT ON THE WOODLAWN TAILINGS … WRP Tech... · WOODLAWN TAILINGS RETREATMENT PROJECT,...

TRI ORIGIN MINERALS LTD.

TECHNICAL REPORT ON THEWOODLAWN TAILINGSRETREATMENT PROJECT,NEW SOUTH WALES, AUSTRALIA

NI 43-101 Report

Authors:Richard J. Lambert, P.E.Wayne W. Valliant, P.Geo.Holger Krutzelmann, P.Eng.

December 15, 2009

SCOTT WILSON ROSCOE POSTLE ASSOCIATES INC.

Scott Wilson Mining

Report Control Form Document Title Technical Report on the Woodlawn Tailings Retreatment

Project, New South Wales, Australia

Client Name & Address

Tri Origin Minerals Ltd.

Document Reference

Project #1453

Status & Issue No.

Version

Issue Date December 15, 2009 Lead Author Wayne W. Valliant

(name)

Peer Reviewer

(name)

Project Manager Approval Wayne W. Valliant

(name)

Project Director Approval Richard J. Lambert

(name)

Report Distribution Name No. of Copies Client Scott Wilson RPA Filing 1 (project box)

1 (project file) Scott Wilson Roscoe Postle Associates Inc.

55 University Avenue, Suite 501 Toronto, Ontario M5J 2H7

Canada Tel: +1 416 947 0907

Fax: +1 416 947 0395 [email protected]

mailto:[email protected]�

SCOTT WILSON RPA www.scottwilson.com

Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project Technical Report NI 43-101 – December 15, 2009 Page i

TABLE OF CONTENTS PAGE

1 SUMMARY ................................................................................................................ 1-1 Executive Summary ................................................................................................ 1-1 Technical Summary ................................................................................................ 1-9

2 INTRODUCTION ....................................................................................................... 2-1

3 RELIANCE ON OTHER EXPERTS ........................................................................... 3-1

4 PROPERTY DESCRIPTION AND LOCATION .......................................................... 4-1

5 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY ........................................................................................................ 5-1

6 HISTORY .................................................................................................................. 6-1

7 GEOLOGICAL SETTING .......................................................................................... 7-1 Regional Geology ................................................................................................... 7-1 Local Geology ........................................................................................................ 7-5 Property Geology.................................................................................................... 7-7

8 DEPOSIT TYPES ...................................................................................................... 8-1

9 MINERALIZATION .................................................................................................... 9-1

10 EXPLORATION ..................................................................................................... 10-1

11 DRILLING .............................................................................................................. 11-1

12 SAMPLING METHOD AND APPROACH .............................................................. 12-1

13 SAMPLE PREPARATION, ANALYSES AND SECURITY ..................................... 13-1

14 DATA VERIFICATION ........................................................................................... 14-1

15 ADJACENT PROPERTIES ................................................................................... 15-1

16 MINERAL PROCESSING AND METALLURGICAL TESTING ............................... 16-1 Plant Background ................................................................................................. 16-1 Metallurgical Testwork .......................................................................................... 16-2 Retreatment Plant Process Description ................................................................ 16-3

17 MINERAL RESOURCE AND MINERAL RESERVE ESTIMATES ......................... 17-1 Mineral Resources ................................................................................................ 17-1 Mineral Reserves.................................................................................................. 17-8

18 OTHER RELEVANT DATA AND INFORMATION ................................................. 18-1

19 ADDITIONAL REQUIREMENTS ........................................................................... 19-1 Mining Operations ................................................................................................ 19-1 Mineral Processing ............................................................................................... 19-9 Markets .............................................................................................................. 19-10 Contracts ............................................................................................................ 19-12


Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project Technical Report NI 43-101 – December 15, 2009 Page ii

Environmental Considerations ............................................................................ 19-13 Taxes ................................................................................................................. 19-15 Capital and Operating Cost Estimates ................................................................ 19-15 Economic Analysis ............................................................................................. 19-17

20 INTERPRETATION AND CONCLUSIONS ............................................................ 20-1

21 RECOMMENDATIONS ......................................................................................... 21-1

22 REFERENCES ...................................................................................................... 22-1

23 DATE AND SIGNATURE PAGE ............................................................................ 23-1

24 CERTIFICATE OF QUALIFIED PERSON ............................................................. 24-1

LIST OF TABLES PAGE

Table 1-1 Recommended Work Program ................................................................... 1-3 Table 1-2 Income Statement ...................................................................................... 1-5 Table 1-3 After-tax Cash Flow Summary .................................................................... 1-6 Table 1-4 Sensitivity Analyses .................................................................................... 1-8 Table 1-5 Mineral Resources ................................................................................... 1-13 Table 1-6 Mineral Reserves ..................................................................................... 1-14 Table 6-1 Historic Production (1978-1998) ................................................................. 6-2 Table 9-1 Size Fraction Analysis - North Dam ............................................................ 9-6 Table 9-2 Size Fraction Analysis - South Dam ........................................................... 9-6 Table 9-3 Size Fraction Analysis - West Dam ............................................................. 9-6 Table 11-1 Drilling Summary ..................................................................................... 11-1 Table 13-1 ALS Chemex Assay Methods ................................................................. 13-2 Table 14-1 Standard Reference Sample Specifications ............................................ 14-1 Table 14-2 Duplicate Samples.................................................................................. 14-7 Table 14-3 Twinned Holes - South Tailings Dam – Denehurst ................................. 14-9 Table 14-4 Twinned Holes - South Tailings Dam – Tri Origin ................................. 14-10 Table 14-5 Twinned Holes - West Tailings Dam – Tri Origin .................................. 14-11 Table 16-1 Woodlawn Plant Metallurgical Balance 1993 .......................................... 16-1 Table 16-2 Tailings Retreatment Plant Metallurgical Balance 1993 .......................... 16-2 Table 17-1 Mineral Resources.................................................................................. 17-1 Table 17-2 Raw Assay Statistics .............................................................................. 17-2 Table 17-3 Density ................................................................................................... 17-5 Table 17-4 Block Model Dimensions ........................................................................ 17-6 Table 17-5 Block Model Statistics ............................................................................. 17-6 Table 17-6 Grade Interpolation Parameters .............................................................. 17-7 Table 17-7 Validation Block Model – December 2008 .............................................. 17-8 Table 17-8 Mineral Reserves ................................................................................... 17-9 Table 19-1 Ore Loss and Dilution Factors ................................................................ 19-7 Table 19-2 Life of Mine Production ........................................................................... 19-8 Table 19-3 Major Equipment List .............................................................................. 19-9 Table 19-4 Average Process Recoveries ............................................................... 19-10 Table 19-5 Operating Costs ................................................................................... 19-16


Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project Technical Report NI 43-101 – December 15, 2009 Page iii

Table 19-6 Overall Capital Costs ............................................................................ 19-17 Table 19-7 Income Statement ................................................................................ 19-19 Table 19-8 After-tax Cash Flow Summary .............................................................. 19-20 Table 19-9 Sensitivity Analyses .............................................................................. 19-22 Table 21-1 Recommended Work Program ............................................................... 21-1

LIST OF FIGURES PAGE

Figure 1-1 Sensitivity Analysis .................................................................................... 1-8 Figure 4-1 General Location Map ............................................................................... 4-4 Figure 4-2 Property Map............................................................................................. 4-5 Figure 4-3 Mineral Lease Location ............................................................................. 4-6 Figure 4-4 Site Map .................................................................................................... 4-7 Figure 7-1 Regional Geology ...................................................................................... 7-3 Figure 7-2 Stratigraphic Column ................................................................................. 7-4 Figure 7-3 Local Geology ........................................................................................... 7-6 Figure 7-4 Property Geology ...................................................................................... 7-9 Figure 9-1 Mineralization – Schematic Cross Section ................................................. 9-3 Figure 9-2 Mineralization – Schematic Longitudinal Section ....................................... 9-4 Figure 11-1 Drill Hole Location Map ......................................................................... 11-2 Figure 14-1 Standard Sample BML - Cu ................................................................... 14-2 Figure 14-2 Standard Sample BML - Pb ................................................................... 14-3 Figure 14-3 Standard Sample BML – Zn .................................................................. 14-3 Figure 14-4 Standard Sample BMH – Cu ................................................................. 14-4 Figure 14-5 Standard Sample BMH – Pb ................................................................. 14-4 Figure 14-6 Standard Sample BMH – Zn .................................................................. 14-5 Figure 14-7 Standard AuS- Au ................................................................................. 14-5 Figure 14-8 Blank Samples ...................................................................................... 14-6 Figure 14-9 Duplicate Samples – Cu ........................................................................ 14-7 Figure 14-10 Duplicate Samples – Pb ...................................................................... 14-8 Figure 14-11 Duplicate Samples – Zn ...................................................................... 14-8 Figure 16-1 Retreatment Plant Flowsheet ................................................................ 16-4 Figure 16-2 Woodlawn Retreatment Plant Layout .................................................... 16-6 Figure 17-1 Histogram – Cu ..................................................................................... 17-2 Figure 17-2 Histogram – Pb ..................................................................................... 17-3 Figure 17-3 Histogram – Zn ...................................................................................... 17-3 Figure 17-4 Histogram – Ag ..................................................................................... 17-4 Figure 19-1 Tailings Areas ....................................................................................... 19-2 Figure 19-2 Upper and Lower Surfaces for Tailings Volume ..................................... 19-3 Figure 19-3 Mining Method ....................................................................................... 19-4 Figure 19-4 Tracked Monitor (Fraser Alexander) ...................................................... 19-5 Figure 19-5 Final Tailings Reclamation .................................................................. 19-14 Figure 19-6 Sensitivity Analysis .............................................................................. 19-22


Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project Technical Report NI 43-101 – December 15, 2009 Page 1-1

1 SUMMARY EXECUTIVE SUMMARY

INTRODUCTION Scott Wilson Roscoe Postle Associates Inc. (Scott Wilson RPA) was retained by Robert

Valliant, Chief Executive Officer of Tri Origin Minerals Ltd. (Tri Origin), to prepare an

independent Technical Report on the Woodlawn Tailings Retreatment Project (the

Project), near the village of Tarago, New South Wales (NSW), Australia. The purpose of

this report is to support the first time disclosure of mineral resources and mineral

reserves for the Project. This Technical Report conforms to NI 43-101 Standards of

Disclosure for Mineral Projects (NI 43-101). Scott Wilson RPA visited the property on

November 10, 2009.

Tri Origin is an Australian publicly traded company (ASX:TRO) with exploration projects

in the Lachlan Fold Belt, NSW, Australia, including the Woodlawn Tailings Retreatment

Project, the Woodlawn underground project, and the Lewis Ponds project. Tri Origin

Minerals Ltd. is 48% owned by Tri Origin Exploration Ltd. (TSX-V:TOE).

CONCLUSIONS ADEQUACY OF PROCEDURES Scott Wilson RPA and various other firms and independent consultants have reviewed

the methods and procedures utilized by Tri Origin and Denehurst Limited (Denehurst),

the previous operator, at the Project to gather geological and assaying information and

found them reasonable and meeting generally accepted industry standards for a

property.

ADEQUACY OF DATA Scott Wilson RPA believes that Tri Origin and Denehurst have conducted exploration

and development sampling and analysis programs using standard practices, providing

generally reasonable results. Scott Wilson RPA believes that the resulting data can

effectively be used in the subsequent estimation of resources and reserves.



ADEQUACY OF STUDY This Technical Report is based on the Feasibility Study prepared by Intermet

Engineering Pty Ltd. (Intermet) for the Project. Scott Wilson RPA believes that these

data and the supporting documents were prepared using standard industry practices and

provide reasonable results and conclusions.

COMPLIANCE WITH CANADIAN NI 43-101 STANDARDS Scott Wilson RPA believes that the current drill hole database is sufficient for generating

a resource model for use in resource and reserve estimation. Recovery and cost

estimates are based upon sufficient data and engineering to support a reserve

statement. Economic analysis using these estimates generates a positive cash flow,

which supports a reserve statement.

Measured and indicated resources for all areas, are 11.65 Mt of material grading 2.3%

zinc, 1.4% lead, 0.5% copper, 0.3 g/t gold, and 32.0 g/t silver. After applying modifying

factors and meeting the economic criteria, the entire mineral resource is converted to

proven and probable mineral reserves. The estimated proven and probable mineral

reserves for the Project total 11.2 Mt of material grading 2.2% zinc, 1.3% lead, 0.5%

copper, 0.3 g/t gold, and 31.1 g/t silver.

Scott Wilson RPA believes that the mineral resource and mineral reserve estimates have

been created utilizing acceptable methodologies. Scott Wilson RPA is also of the

opinion that the classification of measured and indicated resources, stated in Table 1-5,

and proven and probable reserves, stated in Table 1-6, meet the definitions as stated by

NI 43-101, Form 43-101F1, and Companion Policy 43-101CP dated December 23,

2005.

RECOMMENDATIONS Scott Wilson RPA presents the following recommendations. The cost of the

recommended work is $6.12 million as summarized in Table 1-1.



TABLE 1-1 RECOMMENDED WORK PROGRAM Tri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

Item Cost

($ 000s) Metallurgy

Optimize both grind and regrind design, using Deswik technology including studying existing Deswik installations to confirm operating performance parameters.

Continue study copper lead separation parameters including determining appropriate design criteria that will provide the flexibility for in-service optimization of copper lead separation.

Undertake further confirmatory work on potential to scalp off course non-sulphide gangue from tailings, i.e., define optimal size for removing oversize material, talcs and sheet silicates.

Review Feasibility Study and Addendum and undertake a comprehensive Gap Analysis to identify areas that have not been adequately studied and could result in a fatal flaw being designed into the process.

Subtotal 250 Mineral Resource Estimate Run mineral resource block model using unfolding feature 30 Use composite length approximately equal to sample length 10 Subtotal 40 Environmental Assessment

Complete plans to meet Director General's Requirements for Environmental Approval of the Project

Optimize and cost plans for rehabilitation of the Project Site 200 Permitting

Satisfy any Department of Planning conditions imposed as conditions for the transfer of SML 20 to Tri Origin

500 Engineering Prepare mine plan consistent with the actual monitoring operating

procedure 30 Proceed with detailed design 5,000 Subtotal 5,030 Concentrate Marketing 100 Total 6,120



ECONOMIC ANALYSIS The economic project evaluation is based on estimated operating costs supplied to Scott

Wilson RPA. This project evaluation work includes an economic summary, discounted

cash flow analysis, as well as capital and operating cost estimates. The mine plan for

this analysis is based on Exoro Mining Services’ mine planning work.

Based on the costs in the Feasibility Study and Addendum, Scott Wilson RPA created an

economic analysis. The economic analysis shows that at long-term metal prices of

$0.80/lb zinc, $2.50/lb copper, $0.60/lb lead, $975/oz gold and $13/oz silver, the Project

has a pre-tax net present value (NPV) at a 5% discount rate of $29.0 million and an

after-tax NPV at a 5% discount rate of $17.2 million. Total pre-tax undiscounted cash

flow is $57.6 million and after-tax cash flow is $40.2 million.

A preliminary income statement and cash flow are presented as Table 1-2 and Table

1-3, respectively.

Over the mine life, the Internal Rate of Return is 12.0% after tax, with a payback period

of 4.8 years after tax.

The cash operating cost per pound of zinc produced is $0.35 after by-product credits.

When capital costs are added, total cash and non-cash costs (fully loaded) are $0.59 per

pound of zinc after by-product credits.

ECONOMIC CRITERIA REVENUE

• Nominal 1.5 million tonnes per year. • Metal price: US$0.80 per pound zinc, US$2.50 per pound copper, US$0.60 per

pound lead, US$975 per ounce gold and US$13.00 per ounce silver. • Net Smelter Return includes smelting, refining, transport, and insurance costs. • Revenue is recognized at the time of concentrate shipment. • Operating costs in AUD converted to USD at US$0.80 per A$1.00.

COSTS

• Mine life: 7.7 years. • Life-of-mine production plan as summarized in Table 19-2 of this report. • Mine life capital totals $65.5 million. • Average operating cost over the mine life is $28.25 per tonne ore processed.

November 2009 Feasibility Study$0.80 Zn $0.60 Pb $2.50 Cu $13.00 Ag $975.00 AuAnnual Income Summary (in US$ millions)

Year -2 Year -1 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 TOTAL

REVENUEZinc 0.0 0.0 29.3 32.5 31.3 24.6 25.6 29.0 31.4 17.3 0.0 0.0 220.9Copper 0.0 0.0 15.3 17.3 16.2 23.4 21.6 16.6 14.8 7.5 0.0 0.0 132.6Lead 0.0 0.0 3.6 3.9 3.6 5.0 5.0 4.9 4.2 2.9 0.0 0.0 33.0Gold 0.0 0.0 1.4 1.5 1.5 2.8 3.8 3.8 2.0 1.3 0.0 0.0 17.9Silver 0.0 0.0 3.1 3.5 3.2 5.0 5.8 6.0 5.4 4.0 0.0 0.0 36.1

Net Revenue 0.0 0.0 52.6 58.7 55.8 60.8 61.8 60.2 57.8 32.9 0.0 0.0 440.6

CASH COST OF SALESMining 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Process Plant 0.0 0.0 13.0 15.0 15.0 15.0 15.0 15.0 15.0 9.5 0.0 0.0 112.6General & Administrative 0.0 0.0 1.6 1.3 1.3 1.3 1.3 1.3 1.3 0.9 0.0 0.0 10.0Refining 0.0 0.0 17.9 19.8 19.0 17.0 17.4 18.8 19.4 11.1 0.0 0.0 140.4Refining 0.0 0.0 3.4 3.7 3.6 3.6 3.6 3.6 3.6 2.0 0.0 0.0 26.9Royalties 0.0 0.0 0.7 0.8 0.7 1.0 1.0 0.9 0.7 0.4 0.0 0.0 6.0Reclamation 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 2.4

Subtotal Cash Costs 0.0 0.0 36.5 40.6 39.5 37.8 38.2 39.5 40.0 23.8 0.0 2.4 298.3

NON-PRODUCTION COST OF SALESDepreciation 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 65.5Amortized Development Costs 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Amortization of Transaction fee 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Proceeds on Equipment Sales 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Write-down - Book Value @ Project End 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Subtotal Non-Production Costs 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 65.5

Net Income Before Tax (EBIT) 0.0 0.0 9.3 6.4 4.7 10.2 15.7 12.8 13.6 6.4 0.0 -2.4 76.8

Net Income After Tax 0.0 0.0 7.1 4.5 3.3 7.1 11.0 9.0 9.5 4.5 0.0 -2.4 53.6

TABLE 1-2 INCOME SUMMARYTri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project SC

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November 2009 Feasibility Study$0.80 Zn $0.60 Pb $2.50 Cu $13.00 Ag $975.00 AuAnnual Cash Flow Summary (in US$ millions)

Year -3 Year -2 Year -1 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Year 11 TOTALSOURCESRevenue 0.0 0.0 0.0 52.6 58.7 55.8 60.8 61.8 60.2 57.8 32.9 0.0 0.0 0.0 440.6Costs (inc Tax & Int) 0.0 0.0 0.0 45.5 54.2 52.5 53.7 50.8 51.2 48.3 28.4 0.0 2.4 0.0 387.0Net Income - After Tax 0.0 0.0 0.0 7.1 4.5 3.3 7.1 11.0 9.0 9.5 4.5 0.0 -2.4 0.0 53.6

Depreciation & Amort 0.0 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 0.0 65.5From Eq Sale 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0FROM OPNS. 0.0 0.0 0.0 13.9 16.2 14.9 20.0 18.8 16.8 13.7 7.2 0.0 -2.4 0.0 119.1

From Banks 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Repayment 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

FROM FINANCING 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

SOURCES 0.0 0.0 0.0 13.9 16.2 14.9 20.0 18.8 16.8 13.7 7.2 0.0 -2.4 0.0 119.1

USES:Capex 0.0 0.0 60.2 1.4 3.6 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 65.5Working Cap. 0.0 0.0 1.9 3.6 0.5 -0.3 0.8 0.1 -0.3 -0.4 -1.8 -4.2 -0.2 0.2 0.0

USES 0.0 0.0 62.1 4.9 4.1 -0.3 1.2 0.1 -0.3 -0.4 -1.8 -4.2 -0.2 0.2 65.5

NET C.F. 0.0 0.0 -62.1 9.0 12.1 15.2 18.8 18.7 17.1 14.0 8.9 4.2 -2.2 -0.2 53.6

CUMULATIVE C.F. 0.0 0.0 -62.1 -53.1 -41.0 -25.8 -7.0 11.7 28.9 42.9 51.8 56.0 53.8 53.6

TABLE 1-3 AFTER-TAX CASH FLOW SUMMARYTri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

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SENSITIVITY ANALYSIS Sensitivity analyses were performed for zinc price, copper price, lead price, silver price,

capital cost, operating cost, and exchange rate. The sensitivity analyses indicate that

Project economics are most heavily influenced by the operating costs, zinc price, copper

price, and capital costs. A 10% change in operating costs results in a ± $17 million

change in the after-tax NPV at a 5% discount rate. A 10% change in zinc price results in

a ± $11 million change in the after-tax NPV at a 5% discount rate. A 10% change in

copper price results in a ± $6 million change in the after-tax NPV at a 5% discount rate.

A 10% change in capital costs results in a ± $4 million change in the after-tax NPV at a

5% discount rate. The Project is least affected by changes in exchange rate, lead price,

and silver price. A 10% change in the exchange rate, lead price, or silver price results in

a less than ± $2 million change in the after-tax NPV at a 5% discount rate.

Results of the price sensitivity analyses are shown in Figure 1-1 and Table 1-4.

Reserve estimates were based on prices of US$0.80 per pound zinc, US$2.50 per

pound copper, US$0.60 per pound lead, US$975 per ounce gold, and US$13.00 per

ounce silver. Results from the economic analysis at these prices are shown in Table

1-3. Since an after-tax total cash flow of $40.2 million is achieved, the economic criteria

for the reserve statement are met and the resources can be properly classified as proven

and probable mineral reserves.



FIGURE 1-1 SENSITIVITY ANALYSIS

TABLE 1-4 SENSITIVITY ANALYSES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Parameter Variables Units -20% -10% Base +10% +20%

Zinc Price US$/lb 0.64 0.72 0.80 0.88 0.96 Copper Price US$/lb 2.00 2.25 2.50 2.75 3.00 Lead Price US$/lb 0.48 0.54 0.60 0.66 0.72 Silver Price US$/oz 10.40 11.70 13.00 14.30 15.60

Operating Cost $millions 254 286 318 349 381 Capital Cost $millions 52 59 65 72 79

Exchange Rate AUD/USD 0.64 0.72 0.80 0.88 0.96

NPV @ 5% Units -20% -10% Base +10% +20% Zinc Price $millions (4) 7 17 28 38

Copper Price $millions 5 11 17 23 30 Lead Price $millions 14 16 17 19 20 Silver Price $millions 14 16 17 19 20

Operating Cost $millions 48 33 17 2 (16) Capital Cost $millions 26 21 17 13 9

Exchange Rate $millions 22 20 17 15 12



TECHNICAL SUMMARY

PROPERTY DESCRIPTION AND LOCATION The Project is located at the past producing Woodlawn Mine, at Latitude 35°04’ South

and Longitude 149°35’ East in New South Wales, approximately 250 km southwest of

Sydney and 50 km northeast of the Australian capital of Canberra. It can be accessed

by Highway 52 from Canberra through Queanbeyan approximately 25 km north to

Bungendore and turning off at Bungendore on the Tarago Road for 26 km north to the

Woodlawn access road. It is approximately seven kilometres on the Woodlawn access

road to the site. A location map for the Project is presented in Figure 4-1.

LAND TENURE Tri Origin holds 100% interest in the mineral rights of Special Mining Lease 20 (SML 20),

subject to some exclusions near the existing open pit and underground mining areas.

This interest was acquired on January 12, 1999, when Tri Origin purchased the mineral

exploration rights and all exploration and mining data relating to the Woodlawn Mine

from the administrators of Denehurst. Denehurst is now subject to a deed of company

arrangement but is still currently the legal title holder of the lease. Several private

agreements provide the mechanism for Tri Origin to become the registered legal title

holder prior to, or when, a project development decision is made. SML 20 expires on

November 16, 2014. Tri Origin expects the lease to be renewed upon application.

Veolia Environmental Services (Veolia), an independent environmental resource

company, previously Collex Pty Limited (Collex), obtained surface rights in the SML 20

area after the mine closed. Veolia operates a bioreactor and waste management facility

within the old open pit mine. Consequently, a further agreement was entered into

between Tri Origin and the Administrators of Denehurst on October 25, 2000, reaffirming

Tri Origin’s right to obtain mineral title over SML 20 and accommodating Veolia’s

operational requirements.

INFRASTRUCTURE Currently, the major assets and facilities associated with the Project are:



• Tailings in three dams: North Tailings Dam (TDN), South Tailings Dam (TDS), and West Tailings Dam (TDW), created by mining and processing polymetallic ore from 1978 to 1998.

• Facilities providing basic infrastructure to the mine, including electric power, heat,

water treatment and supply, and sewage treatment.

• Access by highway and secondary paved roads.

The region is well populated. A labour force and wide range of services are available

from the city of Canberra (pop. 350,000) and the towns of Queanbeyan (pop. 34,000)

and Bungendore (pop. 3,000).

Power will be purchased from the existing NSW electricity grid, after installation of

appropriate substation requirements. A purchasing agreement will be entered between

Tri Origin and either an energy retailer or wholesaler (from the National Energy Market).

This organization will provide energy into the local distribution system, which is owned by

Country Energy.

Water will be obtained from the Willaroo bore field (about four kilometres west of site)

under the terms of a sublease agreement with Veolia and the landowner. The Company

will develop other basic infrastructure such as workshops, warehouse, fuel storage and

dispensing, offices, ablution blocks, sewage works, etc. By arrangement with Veolia, the

Project will also use certain previous Woodlawn mine facilities. The site will be a zero

discharge facility for any contaminated water sources.

HISTORY Woodlawn was discovered in 1970 by Jododex Australia Pty Ltd., a joint venture of St

Joseph International Explorations and Phelps Dodge Exploration Corporation. Open pit

mining commenced in 1978.

In 1985, the Project was acquired by Australian Mining and Smelting Ltd. (AMS), a

subsidiary of Conzinco Rio Tinto Australia Ltd. (CRA). CRA continued production from

the open pit and developed the underground mine.

In August 1987, Denehurst purchased the Project. Underground mining continued

through to March 1998 when the mine was closed. Open pit production totalled 8.1 Mt



grading 8.3% Zn, 1.6% Cu, 3.1% Pb, 82 g/t Ag, and 0.5 g/t Au. Underground production

was estimated at 5.3 Mt grading 9.9% Zn, 1.6% Cu, 4.3% Pb, 95 g/t Ag, and 0.5 g/t Au.

During 1991 to 1995, Denehurst reprocessed 1.67 Mt of tailings from the TDN grading

1.78% Zn, 0.34% Cu, 1.13% Pb, 30.45% Ag, and 0.24% Au. A minor amount of tailings

from the TDS was retreated, however, production records are not available. The

majority of the retreated tailings were returned to the same dam.

In March 1998, Denehurst was bankrupt and placed into administration, with a Receiver-

Manager appointed.

In late 1999, Collex (now Veolia) purchased the Woodlawn site. This included freehold

land on SML20 and large areas of surrounding property. Veolia lodged a Development

Application to construct and operate the Woodlawn Bioreactor, and this operation has

been running successfully since 2004. The bioreactor involves backfilling the open cut

with putrescible waste and extracting the methane gas for power generation.

Tri Origin Australia, a subsidiary of Tri Origin Exploration Ltd. of Canada and precursor

to Tri Origin Minerals Ltd., acquired the mineral rights to SML20 and associated

technical data in 1999. Tri Origin, at that stage, held exploration licences surrounding

Woodlawn and also acquired the exploration licences held by Denehurst.

GEOLOGY The Woodlawn Project is located near the eastern margins of the Lachlan Fold Belt

(LFB). The LFB is a major north-northwest trending orogenic belt that was created by

convergence of the Australian craton and the proto-Pacific Ocean which occurred from

the Cambrian through to the Carboniferous. The LFB extends from northeastern

Tasmania into Victoria and through much of New South Wales.

The Woodlawn deposit lies in a structurally defined zone of lineaments, termed the

Woodlawn Corridor, within the LFB. The corridor is believed to represent a major

northwest trending palaeogeographic feature that influenced deposition of fine-grained

volcanoclastic sediments and rhyolitic domes adjacent to the deposit. The Woodlawn

deposit is hosted by regionally metamorphosed (greenschist facies) fine and coarse



grained felsic volcanic–pyroclastic rocks, volcanogenic sedimentary rocks, and

carbonaceous shale, informally known as the Woodlawn Group, deposited in the Silurian

(410 Ma).

The Woodlawn polymetallic deposit is a volcanic hosted, massive sulphide deposit

(VMS) associated with late Silurian felsic volcanic and sedimentary rocks. Mineralization

is contained within a series of subparallel lenses dipping moderately to steeply

westwards. The main Woodlawn deposit occupies a series of generally fault-bounded

stratiform packages, enclosed by slate and quartz eye tuff wall rocks and intruded by

dolerite.

Mineralization mined from the open pit and underground, from which the tailings were

derived, is polymetallic, and the predominant minerals extracted in the past were copper,

lead, and zinc, with accessory silver and gold. The mineralization is strictly within lens-

shaped lodes, subparallel to each other, occurring in a repetitious geometry and dipping

to the northwest.

MINERAL RESOURCES AND MINERAL RESERVES Mineral resources were estimated by GeoRes effective May 2008 and reviewed by Scott

Wilson RPA. Scott Wilson RPA generally concurs with the GeoRes estimate, however,

in Scott Wilson RPA’s opinion, the inferred mineral resources as estimated by GeoRes

should be reclassified as indicated mineral resources. The mineral resources as revised

by Scott Wilson RPA are summarized in Table 1-5.



TABLE 1-5 MINERAL RESOURCES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Classification Tonnes (Mt)

Grade Cu Pb Zn Ag Au (%) (%) (%) (%) (%)

South Measured 2.43 0.48 1.19 2.60 24.60 0.22 (TDS) Indicated 2.07 0.48 1.19 2.39 23.50 0.22 Meas + Ind 4.50 0.48 1.19 2.50 24.10 0.22 West Measured 2.05 0.60 1.46 2.00 35.66 0.39 (TDW) Indicated 2.02 0.60 1.50 1.91 36.17 0.39 Meas + Ind 4.07 0.60 1.48 1.95 35.91 0.39 North - Treated Measured 0.56 0.36 1.07 1.77 28.60 0.27 (TDNU) Indicated 1.11 0.33 1.16 1.78 31.41 0.23 Meas + Ind 1.67 0.34 1.13 1.78 30.47 0.24 North - Untreated Measured 0.27 0.58 2.17 3.54 49.70 0.33 (TDNL) Indicated 1.14 0.47 1.63 3.06 45.92 0.32 Meas + Ind 1.41 0.49 1.73 3.15 46.65 0.32 All Dams Measured 5.31 0.52 1.33 2.33 30.57 0.30 Indicated 6.34 0.49 1.36 2.25 32.96 0.29 Meas + Ind 11.65 0.50 1.35 2.29 31.87 0.30

Notes:

1. CIM definitions were followed for mineral resources. 2. Mineral resources were estimated at a zero cut-off grade. 3. Mineral resources are inclusive of mineral reserves. 4. Mineral resources were estimated using bulk density of 1.7 t/m3 for TDS, 1.85 t/m3 for

TDW, 1.6 t/m3 for TDNU, and 1.35 t/m3 for TDNR. 5. Columns and rows may not add exactly due to rounding.

The review of the resource block model identified some blocks that would not be

recoverable by the proposed hydraulic mining method. The block model was modified to

exclude these blocks. The resource block model was then adjusted to allow for dilution

and recovery. The remaining mineralization comprised an economically viable life of

mine plan and, in Scott Wilson RPA’s opinion, constitutes mineral reserves as

summarized in Table 1-6.



TABLE 1-6 MINERAL RESERVES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Classification Tonnes Grade

Cu Pb Zn Ag Au (Mt) (%) (%) (%) (%) (%)

South Proven 2.43 0.47 1.15 2.52 23.89 0.21 Probable 1.86 0.47 1.15 2.32 22.86 0.21 Prov + Prob 4.29 0.47 1.15 2.43 23.44 0.21 West Proven 2.05 0.59 1.42 1.94 34.63 0.36 Probable 1.88 0.59 1.46 1.85 35.08 0.36 Prov + Prob 3.93 0.59 1.44 1.90 34.85 0.36 North Proven 0.83 0.42 1.39 2.28 34.89 0.27 Probable 2.20 0.39 1.37 2.36 37.69 0.26 Prov + Prob 3.02 0.40 1.38 2.34 36.92 0.26 All Dams Proven 5.31 0.52 1.33 2.33 30.57 0.30 Probable 5.94 0.49 1.36 2.25 32.96 0.29 Prov + Prob 11.24 0.49 1.31 2.22 31.05 0.28

Notes:

1. CIM definitions were followed for mineral reserves. 2. Mineral reserves are estimated at a zero cut-off grade. 3. Mineral resources were estimated using bulk density of 1.7 t/m3 for TDS, 1.85 t/m3 for

TDW, 1.6 t/m3 for TDNU, and 1.35 t/m3 for TDNR. 4. Columns and rows may not add exactly due to rounding.

MINING OPERATIONS The Project will be an open cut hydraulic mining operation to recover previously

processed mineralized tailings. Hydraulic mining will progress using a top-down

approach with a channel feeding back to a sump.

The operation will commence in the TDS with a floating pontoon fitted with two

submersible pumps to remove the standing water. After the tailings area is dewatered,

an initial “slot” of tailings will be removed using the monitor to establish the reclaim

drainage channel, and the pumping station will be installed. From the sump, a feed

channel will be cut across each mining cell and monitoring will develop the feed channel



to the outside edges of the tailings. The working face will be developed in a series of 20

m to 30 m en-echelon cuts advancing toward the sump and the dam.

Monitoring will commence from a single track-mounted monitor working on top of the

tailings along the crest of the main drainage slot where a working face will be developed.

The slurry will then drain along the slot at a 1% grade back to the reclaim sump for

pumping to the thickener. The working face will then be mined back to the sump.

Monitoring operations will be on a 24-hour, 7-day per week basis at a nominal rate of

190 tonnes per hour. Slurries developed by the monitors are anticipated to be 55% to

60% solids.

MINERAL PROCESSING Mineral processing is a conventional flotation milling circuit, with primary grinding using

two Deswik 2000L vertical mill units to get a P80 of 30 μm.

The flotation circuit will consist of the sequential flotation of talc, copper, lead and zinc

concentrates. The flotation conditions will be controlled by reagent addition to achieve

good mineral separation. Following flotation, the copper, lead, and zinc concentrates will

be separately thickened in high-rate thickeners, with the underflows being pumped to

separate agitated storage tanks. The three concentrates will then be batched through

three dedicated vertical plate and frame filters discharging into stockpiles (copper and

zinc) or a feed bin (lead).

The concentrates will be loaded into lined standard 20 ft shipping containers and trucked

to Port Botany container terminal.

ENVIRONMENTAL CONSIDERATIONS An Environmental Assessment (EA) is being prepared by consultants Parsons

Brinckerhoff for submission to the NSW Department of Planning in fulfillment of the

project development approval process. A preliminary EA was prepared in March 2008,

which found that five key areas should be addressed to mitigate environmental risks.

The June 2008 Feasibility Study and preliminary design has addressed each of these

items.



The closure and reclamation plan for the Project has been designed based on re-

establishing vegetation on the surface of the redisposed tailings. Total closure costs are

estimated to be $12.0 million prior to taking the salvage value of the assets into account.

CAPITAL AND OPERATING COST ESTIMATES The initial capital cost is estimated at $60.2 million plus sustaining capital of $5.3 million.

Operating costs are estimated at $28.25 per tonne processed.



2 INTRODUCTION Scott Wilson Roscoe Postle Associates Inc. (Scott Wilson RPA) was retained by Robert

Valliant, Chief Executive Officer of Tri Origin Minerals Ltd. (Tri Origin), to prepare an

independent Technical Report on the Woodlawn Tailings Retreatment Project (the

Project), near the village of Tarago, New South Wales (NSW), Australia. The purpose of

this report is to support the first time disclosure of mineral resources and mineral

reserves for the Project. This Technical Report conforms to NI 43-101 Standards of

Disclosure for Mineral Projects (NI 43-101). Scott Wilson RPA visited the property on

November 10, 2009.

Tri Origin is an Australian publicly traded company (ASX:TRO) with exploration projects

in the Lachlan Fold Belt, NSW, Australia, including the Woodlawn Tailings Retreatment

Project, the Woodlawn underground project, and the Lewis Ponds project. Tri Origin

Minerals Ltd. is 48% owned by Tri Origin Exploration Ltd. (TSX-V:TOE).

Currently, the major assets and facilities associated with the Project are:

• Tailings in three dams: North Tailings Dam (TDN), South Tailings Dam (TDS), and West Tailings Dam (TDW), created by mining and processing.

• Facilities providing basic infrastructure to the mine, including electric power, heat,

water treatment and supply, and sewage treatment.

• Access by highway and secondary paved roads.

Scott Wilson RPA has had no prior involvement in the Project.

SOURCES OF INFORMATION Site visits were carried out by Richard Lambert, P.E., Principal Mine Engineer, and

Wayne Valliant, P.Geo., Principal Geologist, Scott Wilson RPA.

Discussions were held with personnel from Tri Origin:

• Robert Valliant, CEO, Tri Origin • Jeff Quartermaine, CFO, Tri Origin • Alan Snowden, Director, Tri Origin



• Robin Rankin, Geology Consultant, GeoRes • Rodney Elvish, Consultant Metallurgist, B E Enterprises • Dave Hobby, District Geologist NSW, Tri Origin • Bob Cotton, Consulting Geologist

Richard Lambert prepared parts of items 1, 16, 17, 18, 19, and 20. Wayne Valliant

prepared Items 2 through 15 inclusive and parts of items 1, 17, 20, and 21. Holger

Krutzelmann prepared Item 16 and parts of items 1, 18, 19, and 20.

The documentation reviewed, and other sources of information, are listed at the end of

this report in Section 22, References.



LIST OF ABBREVIATIONS Units of measurement used in this report conform to the SI (metric) system. All currency

in this report is US dollars (US$) unless otherwise noted.

µ micron kPa kilopascal °C degree Celsius kVA kilovolt-amperes °F degree Fahrenheit kW kilowatt µg microgram kWh kilowatt-hour A ampere L litre a annum L/s litres per second bbl barrels m metre Btu British thermal units M mega (million) C$ Canadian dollars m2 square metre cal calorie m3 cubic metre cfm cubic feet per minute min minute cm centimetre MASL metres above sea level cm2 square centimetre mm millimetre d day mph miles per hour dia. diameter MVA megavolt-amperes dmt dry metric tonne MW megawatt dwt dead-weight ton MWh megawatt-hour ft foot m3/h cubic metres per hour ft/s foot per second opt, oz/st ounce per short ton ft2 square foot oz Troy ounce (31.1035g) ft3 cubic foot oz/dmt ounce per dry metric tonne g gram ppm part per million G giga (billion) psia pound per square inch absolute Gal Imperial gallon psig pound per square inch gauge g/L gram per litre RL relative elevation g/t gram per tonne s second gpm Imperial gallons per minute st short ton gr/ft3 grain per cubic foot stpa short ton per year gr/m3 grain per cubic metre stpd short ton per day hr hour t metric tonne ha hectare tpa metric tonne per year hp horsepower tpd metric tonne per day in inch US$ United States dollar in2 square inch USg United States gallon J joule USgpm US gallon per minute k kilo (thousand) V volt kcal kilocalorie W watt kg kilogram wmt wet metric tonne km kilometre yd3 cubic yard km/h kilometre per hour yr year km2 square kilometre



3 RELIANCE ON OTHER EXPERTS This report has been prepared by Scott Wilson RPA for Tri Origin. The information,

conclusions, opinions, and estimates contained herein are based on:

1. Information available to Scott Wilson RPA at the time of preparation of this report,

2. Assumptions, conditions, and qualifications as set forth in this report, and

3. Data, reports, and other information supplied by Tri Origin and other third party sources.

For the purpose of this report, Scott Wilson RPA has relied on ownership information

provided by Tri Origin. Scott Wilson RPA has not researched property title or mineral

rights for the Project and expresses no opinion as to the ownership status of the

property.

Scott Wilson RPA has relied on Tri Origin for guidance on applicable taxes, royalties,

and other government levies or interests, applicable to revenue or income from the

Project.

Except for the purposes legislated under provincial securities laws, any use of this report

by any third party is at that party’s sole risk.



4 PROPERTY DESCRIPTION AND LOCATION The Project is located at the past producing Woodlawn Mine, at Latitude 35°04’ South

and Longitude 149°35’ East in New South Wales, approximately 250 km southwest of

Sydney, and 50 km northeast of the Australian capital of Canberra. It can be accessed

by Highway 52 from Canberra through Queanbeyan approximately 25 km north to

Bungendore and turning off at Bungendore on the Tarago Road for 26 km north to the

Woodlawn access road. It is approximately seven kilometres on the Woodlawn access

road to the site. A location map for the Project is presented in Figure 4-1.

The Project survey control is based on a local mine coordinate grid, rotated 11º0’25”

clockwise from the Australian Map Grid (AMG) to approximately magnetic north and

centred on a point 10,000 East and 20,000 North. The mine coordinate grid reduced

level (RL) elevation adds 2,000 m to the MASL. The coordinate grid before rotation is

based on the Universal Transverse Mercator (UTM) coordinate system. It is based on

the Zone 55 East projection, using the Australian Map Grid 1966 (AMG’66) datum. The

UTM coordinates place the Woodlawn Tailings Project at 734,540E, 6,117,180N at an

elevation of 800 MASL.

The Project comprises one Special Mining Lease, SML 20, which covers 2,368 ha in the

immediate area of the Woodlawn Mine (Figure 4-2). Details of the property tenure were

provided by Tri Origin and validated by independent mineral tenure specialists

Hetherington Exploration & Mining Title Services Pty Ltd., September 9, 2009. The limits

of SML 20 are illustrated in Figure 4-3, and the aerial photo in Figure 4-4 illustrates the

location of the open pit and the tailings ponds.

LAND TENURE Tri Origin holds 100% interest in the mineral rights to SML 20, subject to some

exclusions near the existing open pit and underground mining areas. This interest was

acquired on January 12, 1999, when Tri Origin purchased the mineral exploration rights

and all exploration and mining data relating to the Woodlawn Mine from the

administrators of Denehurst Limited (Denehurst), the previous mine operator. Denehurst

is now subject to a deed of company arrangement but is still currently the legal title



holder of the lease. Several private agreements provide the mechanism for Tri Origin to

become the registered legal title holder prior to, or when, a project development decision

is made. SML 20 expires on November 16, 2014. Tri Origin expects the lease to be

renewed upon application.

Veolia Environmental Services (Veolia), a large international environmental resource

company, previously Collex Pty Limited (Collex), obtained surface rights in the SML 20

area after the mine closed. Veolia operates a bioreactor and waste management facility

within the old open pit mine. Consequently, a further agreement was entered into

between Tri Origin and the Administrators of Denehurst on October 25, 2000, reaffirming

Tri Origin’s right to obtain mineral title over SML 20 and accommodating Veolia’s

operational requirements.

On September 29, 2006, Tri Origin entered into an agreement with Collex (now Veolia)

which provided for the transfer of SML 20 and certain lands to Tri Origin prior to or upon

achieving approval for the development of the Project. On October 13, 2006, the

administrators of Denehurst, Collex, and Tri Origin entered into a tripartite agreement

which novated to Collex the obligations of Denehurst to transfer the right to minerals

within SML 20 to Tri Origin. Upon the transfer of the right to minerals within SML 20, Tri

Origin would assume the environmental liabilities relating to the previous mining

activities which are outside Veolia’s area of operations. On completion of a feasibility

study, and potentially project funding arrangements, Tri Origin will request that Veolia

transfer to it registered title to SML 20 and relevant land. The existing mining lease

conditions will be negotiated with the government at the time of transfer.

In November 2008, Tri Origin finalized commercial negotiations with Veolia with regard

to various development aspects for the Woodlawn Project. The execution of

documentation by Veolia and Tri Origin establishes a framework for the future

independent operation of both businesses on the Woodlawn site by promoting mutual

cooperation. The following agreements have been signed by the two companies:

• Deed to Assign Special Mining Lease (SML 20) to Tri Origin including an agreement to lease land from Veolia.

• Option Agreement granting Tri Origin the right to acquire land from Veolia.



• Cooperation Deed between Veolia and Tri Origin relating to various infrastructure and services sharing.

These latter agreements provide for Tri Origin to operate all mining facilities connected

with the retreatment, underground, and other projects that could be developed, without

interfering with the ongoing waste management and bioreactor operations of Veolia.

SURVEY The SML was surveyed prior to being granted in 1973. At that time, the boundary was

surveyed in accordance with the Mining Act.

ENVIRONMENTAL An Environmental Assessment (EA) is being prepared by consultants Parsons

Brinckerhoff for submission to the NSW Department of Planning, in fulfillment of the

project development approval process. A preliminary EA was prepared in March 2008,



items.

New Guinea

TimorJava

Borneo

Celebes

SouthIsland

NorthIsland

New Caledonia(France)

Indian Ocean

Pacific Ocean

IndianOcean

Solomon Sea

Gulf ofCarpentaria

Great Australian Bight

Timor Sea

Tasman Sea

Coral Sea

Arafura SeaJava Sea

Banda Sea

Vanuatu

Solomon Islands

PapuaNew Guinea

New Zealand

Australia

Indonesia

Timor Leste(East Timor)

WesternAustralia

NorthernTerritory

SouthAustralia

Queensland

New South Wales

Victoria

Tasmania

A.C.T.

Roma

Northam

Murwillumbah

Mount Isa

Monto

Maryborough

Longreach

Kalgoorlie

Hughenden

Geraldton

Cooktown

Bunbury

Bowen

Barcaldine

Alice Springs

Charters Towers

Tual

Nelson

Greymouth

Kupang

Turangi

Timaru

Kaitaia

Raba

Wodonga

Wilcannia

Cairns

Bathurst

Albany

Vinefera

Townsville

Tamworth

Rockhampton

Port Hedland

NorsemanNarrandera

Moree

Miles

Mackay

Katherine

Horsham

Grafton

Esperance

Emerald

Cloncurry

Charleville

Dubbo

Coonabarabran

Kerema

Invercargill

Gisborne

Ambon

Hobart

Darwin

ParepareLae

MadangMount Hagen

Hamilton

Dunedin

Christchurch

Banjarmasin

Whyalla

Mount Gambier

Mildura Sydney

Surabaja

Perth

Brisbane

Auckland

Adelaide

Melbourne

DiliPort Moresby

Port-vila

Wellington

Honiara

Canberra

WOODLAWN PROJECT

140°

140°

170°

170°

120°

10°

160°

160°

150°

150°

20°

30°

10°

20°

30°

40°

180°

National Capital

Legend:

Roads

Cities

0

0 245 490 KM

490 Miles245

N

December 2009General Location Map


New South Wales, Australia

Woodlawn Tailings Retreatment Project

Figure 4-1

130°

130°

SC

OT

TW

ILS

ON

RP

A

4-4

ww

w.sco

ttwilso

n.co

m

LAKE

GEORGE

LakeBathurst

Feder

al

Fede

ral

Bra

idw

ood

Hume

Hw

y

Hw

y

Road

Hwy

A.C.T.

WOODLAWN PROPJECT

149°3

0'

35°00' 35°00'

Canberra

WOODLAWN

Brisbane

Kalgoorlie

Melbourne

Hobart

AUSTRALIA

Alice Springs

Broken Hill

Adelaine

Rockhampton

Townsville

Cairns

Sydney

Wyndham

Daly Waters

Derby

Dampier

Geraldton

Albany

Esperance

Perth

Highways

Mount Fairy

Boro

Tarago

Sutton

Currawang

CowleyHills

SML20

Collector

Breadalbane

Gundaroo

Bungendore

Cunning

“Pylara”“Intemodal”

GOULBURN

CANBERRA

QUEANBEYAN

Legend:

Minor Roads

Main Roads

Railways

0 250 1000

Kilometres

500 750

N

December 2009


Property Location Map



Figure 4-2

4-5


0 1 5

Kilometres

2 3 4

N

December 2009 Source: Tri Origin Minerals Ltd., 2009.


Mineral Lease Location



Figure 4-3

4-6




Site Map


Australia

Figure 4-4

4-7




5 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY ACCESSIBILITY The Project is located at the past producing Woodlawn Mine, in New South Wales,

Australia, 250 km southwest of Sydney, and 50 km northeast of the city of Canberra as

illustrated in Figure 4-1. The Property is accessed by paved highways and secondary

roads using Highway 52 from Canberra through Queanbeyan approximately 25

kilometres north to Bungendore and turning off at Bungendore on the Tarago Road for

26 kilometres north to the Woodlawn access road. It is approximately seven kilometres

on the Woodlawn access road to the site. Canberra has a domestic airport with regular

commuter service to Sydney and Melbourne.

CLIMATE The climate of the Woodlawn region is cool temperate, with seasonal climatic variations

ranging from hot summers (December–March) to cool winters (June–August). The

average daily maximum temperature ranges from 27.5ºC in January to 11.5ºC in July.

The average annual rainfall is 685 mm. October is the wettest month, on average with

70.6 mm of rain, and July is the driest, with 46.6 mm. There is occasional snow in the

winter.

Annual evaporation for the site ranges from 938 mm to 1,983 mm resulting in, on

average, an excess of evaporation over rainfall. The nearest meteorological station with

long term continuous rainfall data is Lake Bathurst (Station 070036 - Somerton), which is

approximately 10 km northeast of the Woodlawn mine site. The station has recorded

data from 1931 to present day of which only one year (1931) has less than 365 days of

data. Key points in the meteorological data set include:

• Average annual rainfall from Lake Bathurst is 685 mm. • Highest rainfall year in the data set is 1950, with 1,305 mm. • The highest recorded single rainfall event on site occurred on March 15, 1989,

when 161 mm of rainfall occurred with a 24-hour period.



LOCAL RESOURCES The region is well populated. A labour force and wide range of services are available

from the city of Canberra (pop. 350,000) and the towns of Queanbeyan (pop. 34,000),

and Bungendore (pop. 3,000).

INFRASTRUCTURE Power will be purchased from the existing NSW electricity grid, after installation of

appropriate substation requirements. A purchasing agreement will be entered into

between Tri Origin and either an energy retailer or wholesaler from the National Energy

Market. This organization will provide energy into the local distribution system, which is

owned by Country Energy.

Water will be obtained from the Willaroo bore field, about four kilometres west of site,

under the terms of a sublease agreement with Veolia and the landowner. Tri Origin will

develop other basic infrastructure such as workshops, warehouse, fuel storage and

dispensing, offices, ablution blocks, sewage works, etc. By arrangement with Veolia, the

Project will also use certain previous Woodlawn mine facilities. The site will be a zero

discharge facility for any contaminated water sources.

PHYSIOGRAPHY The local physiography comprises rolling hills. The mean elevation at the Project is

approximately 800 masl, with local variations of approximately 100 m.

Vegetation in the area is characteristic of Australian dry eucalypt forest or bush. Much of

the forest has been cleared and is now open grassland used for grazing stock. Some of

the surrounding hills have been reforested with fir trees. Areas of the Project site that

have not been previously disturbed by mining activity consist predominantly of cleared

pastoral land and small isolated patches of native vegetation.



6 HISTORY OWNERSHIP HISTORY Woodlawn was discovered in 1970 by Jododex Australia Pty Ltd., a Joint Venture of St

Joseph International Explorations and Phelps Dodge Exploration Corporation. Open pit

mining commenced in 1978.

In 1985, the Project was acquired by Australian Mining and Smelting Ltd. (AMS), a

subsidiary of Conzinco Rio Tinto Australia Ltd (CRA). CRA continued production from

the open pit and developed the underground mine.

In August 1987, Denehurst purchased the Project. Underground mining continued

through to March 1998 when the mine was closed. Denehurst primarily treated

underground ore from the Woodlawn Mine, but also lesser amounts of material from two

other underground sources, Currawang and Cowley Hills, as well as minor amounts of

open pit remnant and some higher grade tailings material. In March 1998, Denehurst

was bankrupt and placed into administration, with a Receiver-Manager appointed.

In late 1999, Collex (now Veolia) purchased the Woodlawn site. This included freehold

land on SML20 and large areas of surrounding property. Veolia lodged a Development

Application to construct and operate the Woodlawn Bioreactor, and this operation has

been running successfully since 2004. The bioreactor involves backfilling the open cut

with putrescible waste and extracting the methane gas for power generation.

Tri Origin Australia, a subsidiary of Tri Origin Exploration Ltd. of Canada and precursor

to Tri Origin Minerals Limited, acquired the Mineral Rights to SML 20 and associated

technical data in 1999. Tri Origin at that stage held exploration licences surrounding

Woodlawn and also acquired the exploration licences held by Denehurst.

EXPLORATION HISTORY In 1988, Denehurst drilled 25 core holes for a total of 178.2 m in the North and South

tailings dams to study the feasibility of retreating the tailings. In 1995, Denehurst drilled

an additional 15 core holes for a total of 168.5 m in the South Tailings Dam.



PRODUCTION HISTORY Tri Origin’s compilation of historical production data indicates that open pit production

totalled 8.1 Mt grading 8.3% Zn, 1.6% Cu, 3.1% Pb, 82 g/t Ag, and 0.5 g/t Au.

Underground production was estimated at 5.3 Mt grading 9.9% Zn, 1.6% Cu, 4.3% Pb,

95 g/t Ag, and 0.5 g/t Au.

Tailings were produced over the entire 20-year period and stockpiled in three dams:

Tailings Dam North (TDN), Tailings Dam South (TDS), and Tailings Dam West (TDW).

Although the general sequence of tailings placement was TDN, then TDS, and finally

TDW, at times material was placed in different locations on a limited basis.

During 1991 to 1995, Denehurst reprocessed 1.67 Mt of tailings from the TDN grading

1.78% Zn, 0.34% Cu, 1.13% Pb, 30.45% Ag, and 0.24% Au. A minor amount of tailings

from the TDS was retreated, however, production records are not available. The

majority of the retreated tailings were returned to the same dam.

The overall mine production at Woodlawn was a nominal 13.4 million tonnes over the 20-

year life. Table 6-1 shows the historic mine production figures.

TABLE 6-1 HISTORIC PRODUCTION (1978-1998) Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Area / Ore Type

Ore Mined

Cu Grade

Pb Grade

Zn Grade

Au Grade

Ag Grade

(Mt) (%) (%) (%) (g/t) (g/t) OPEN PIT MINE Copper Ore 3.09 1.50 0.50 1.70 0.60 63.00 Complex Ore 4.95 1.60 4.70 12.50 0.50 88.00 Gossan Ore 0.02 0.00 4.12 0.00 0.00 570.87 Supergene Ore 0.04 11.40 6.50 0.00 0.00 513.00 Subtotal Open Pit 8.10 1.61 3.10 8.29 0.53 81.63 UNDERGROUND 5.29 1.60 4.30 9.90 0.50 95.00 Total / Avg Woodlawn 13.39 1.60 3.58 8.93 0.52 86.91



7 GEOLOGICAL SETTING The following description of the geology of the Project relate to the mineralization from

which the tailings were derived. The descriptions were taken for the most part from a

report entitled “Woodlawn Exploration Project Technical Report NI 43-101” prepared by

Robin Rankin for Tri Origin and dated October 9, 2009.

REGIONAL GEOLOGY The Woodlawn Project is located near the eastern margins of the Lachlan Fold Belt

(LFB). The LFB is a major north-northwest trending orogenic belt that was created by the

convergence of the Australian craton and the proto-Pacific Ocean which occurred from

the Cambrian through to the Carboniferous. The LFB extends from northeastern

Tasmania into Victoria and through much of New South Wales. The northern, western,

and eastern boundaries are masked by younger sedimentary basin cover. The LFB is

divided into numerous strato-tectonic zones commonly referred to as anticlinorial and

synclinorial zones. The boundaries between these zones are marked by regional faults,

thrusts, igneous bodies, unconformities as well as lithological, metallogenic, and tectonic

contrasts. In the Project area, the synclinorial zones consist of Siluro-Devonian

volcanics and sediments. These are bounded by anticlinorial zones consisting of deep

marine Ordovician sediments generally intruded by Siluro-Devonian granites.

The Woodlawn Project is located in the Captains Flat-Goulburn Synclinorial Zone

(CFGSZ), which developed during the Early to Mid-Silurian following uplift and extension

of basement Ordovician strata. The CFGSZ is a relatively narrow belt of volcanic and

sedimentary rocks that extends for over 300 km north to south. The CFGSZ is one of

several fault-bounded Silurian to Devonian aged basins that host a range of base metal

and gold occurrences in New South Wales.

In the Woodlawn area, Late Silurian rocks of the Mt Fairy Group unconformably overlie

Ordovician basement of the Molong Rise which consists of quartz-rich flysch sediments

(Birkenburn Beds). The boundary between these terranes is marked by a major thrust.

The Mt Fairy Group rocks are mostly acid to basic volcano-sedimentary sequences and

represent deformed fill of the Ngunawal Basin, which is part of the CFGSZ. Early



Devonian, shallow to deep water sediments unconformably overlie the Mt Fairy Group.

The whole sequence is highly deformed, regionally metamorphosed to lower greenschist

facies and intruded by syn- and late kinematic Early Devonian granites. Early Devonian

dolerites intrude the entire sequence.

East–west compression has produced a series of north plunging, overturned

anticline/syncline pairs with west dipping axial planes and associated west dipping

meridional thrust faults. The Currawang Anticlinorium in the west and Mulwaree

Synclinorium in the east are the major fold structures in the area with the Woodlawn

Syncline and Pylara Anticline interpreted as major subsidiary folds.

The regional geology is illustrated in Figures 7-1 and 7-2.

Tertiary Basalt

Legend:

Silurian Sediments (Covan Creek Formation)

Devonian Granites

Silurian Currawang Basalt

Woodlawn Volcanics

Undifferentiated Silurian Volcanics andOrdovician Sediments

Ordovician Merigan Black Shale

Ordovician Marine Sediments - Turbiditic QuartzoseSiltstone and Sandstone, Minor Chert

0 2 10

Kilometres

4 6 8

N



Regional Geology


Australia

Figure 7-1

7-3


EARLY

DEVONIAN

LATE

LATE

MOUNT

SILURIAN

ORDOVICIAN

FAIRY

GROUP

Lochkovian

Ludlovian

Pridolian

MULWAREE

GROUP

Covan

Formation

Creek

Tarago Conglomerate

Silurian Dolerite

Woodlawn Volcanics/

Currawang Basalt

De Drack Formation

epi-Silurian decollement

Birkenburn Beds

Merigan Black Shale Member



Stratigraphic Column


Australia

Figure 7-2

7-4




LOCAL GEOLOGY The Woodlawn deposit lies in a structurally defined zone of lineaments, termed the

Woodlawn Corridor, within the LFB. The corridor is believed to represent a major

northwest trending palaeogeographic feature that influenced deposition of fine-grained

volcanoclastic sediments and rhyolitic domes adjacent to the deposit. The Woodlawn

deposit is hosted by regionally metamorphosed, greenschist facies, fine- and coarse-

grained felsic pyroclastic rocks, volcanogenic sedimentary rocks, and carbonaceous

shale, informally known as the Woodlawn Group, deposited in the Silurian (410 Ma).

Younger rocks, late Silurian, immediately above this sequence become increasingly

mafic, with a high proportion forming as spilite. In the latter stages of deposition, dolerite

sills intruded the rocks now situated above and below the Woodlawn deposit. Dolerite

sills comprise 50% to 60% of hangingwall rock in the Woodlawn deposit. The local

geology is illustrated in Figure 7-3.

6110000 m

N725000 mE

6115000 m

N730000 mE

6120000 m

N735000 mE

6125000 m

N

15000

mE

15000

mE

10000

mE

5000 mN

10000 mN

15000 mN

10000

mE

5000

mE

0m

E

15000 mN

10000 mN

5000 mN

5000

mE

urr

aw

ang

Basal

De Drack

Sediment

Massive Sulphid

Covan Ck Fm

Merrigan Black

6115000 m

N6120000 m

N6125000 m

N

740000 mE 745000 mE

De Track; Silstone, Sandstone, Rhyolite

Legend:

Sediment; Quartz Siltstone, Shale

Felsic Volcanic; Dacite, Rhyolite

Granite; Granite

Merrigan Black; Black Shale

Covan Creek Formation; Quartzite, Siltstone, Sandstone

Currawang Basal; Basalt

Woodlawn Volcanic; Rhyolite

0 1

Kilometres

2 3 4

N



Local Geology


Australia

Figure 7-3

SC

OT

TW

ILS

ON

RP

A

7-6

ww

w.sco

ttwilso

n.co

m



PROPERTY GEOLOGY The primary Woodlawn deposit lies on the eastern limb of the asymmetric north-

northwest plunging Woodlawn syncline. The regional structures trend north-south, with

the local foliation dipping moderately to steeply to the west. Woodlawn is a polymetallic

deposit described as a volcanogenic massive sulphide hosted in Silurian rocks.

Mineralization is contained within a series of subparallel lenses dipping moderately to

steeply westwards. The main Woodlawn deposit occupies a series of generally fault-

bounded stratiform packages, enclosed by slate and quartz eye tuff wall rocks and

intruded by dolerite.

Many of the volcanoclastic rocks at the Project are now laminated, quartz-sericite

bearing tuffaceous shale and chloritic-talc schist. The lower south and west sectors of

the mine volume are dominated by felsic volcanics, while the upper north and east are

dominated by tuffaceous shales. The C Lens is 50% hosted by the lower volcanic units,

while the B Lens is 70% hosted by the upper shales.

Volcanic units interfinger the shales and exhibit complex and rapid facies changes.

Certain volcanic units have been identified as being associated with mineralization and

most of the lenses are in some way in contact with these units.

The mine sequence is folded into an overturned, isoclinal syncline. The Woodlawn

deposit occurs on the eastern limb of the syncline. The syncline axis plunges at

approximately 60° to the north-northwest. The axial plane dips at approximately 60° to

the west and is paralleled by a strong slatey cleavage or more intense schistosity

throughout the mine sequence. The mineralized zones have an average northeast strike

of 30°-40° azimuth and plunge to the north. Numerous parasitic folds are now

recognized as tight isoclinal structures. The Western and Main lenses appear to be

located on opposing limbs of one of these fold structures.

A steeply northwest plunging extension lineation is also recognized which is parallel to

the plunge of the lenses. This extension may control apparent necking and boundinage

features observed in some lenses. This observation may also lead to potential for



boudinaged extensions down plunge of existing lenses, a feature already observed in

the B and C lenses.

Denehurst geologists supported by structural studies recognized that the main A, B, and

C lenses were originally one lens but are now displaced by a series of sinistral and

dextral faults. The existence of these faults is the basis of the current exploration model.

Lenses such as B5 at the northern limit of the mine are wide at their northern fault

termination and invite exploration for extension north of the fault.

The massive sulphide lenses are located within structural packages often less

complicated than the folding. The comparative predictability of these structural packages

is a factor of interest to predict new ore rather than limited extensions of known ore.

Certain packages now defined in the mine are known never to contain ore and thus

significantly reduce the volume to be studied for targets.

Relationships between known lenses and the geometry of their enclosing packages are

being refined in order to further identify controlling factors for the occurrence of

mineralization and assist in the prediction of potential new occurrences.

0 50

Metres

100 150 200



Typical Cross SectionSection Through ‘E’ and ‘C’ Lenses


Australia

Figure 7-4

7-9




8 DEPOSIT TYPES The following description of deposit types refers to the open pit and underground

mineralization from which the tailings were derived. The description is taken for the most

part from a report entitled “Woodlawn Exploration Project Technical Report NI 43-101”

prepared by Robin Rankin for Tri Origin and dated October 9, 2009.

The Woodlawn deposit is a volcanic hosted, massive sulphide deposit (VMS) associated

with late Silurian felsic volcanic and sedimentary rocks. The deposits are usually rich in

zinc, lead, and copper but can also contain appreciable silver and gold.

The primary Woodlawn underground deposit is classified as a zinc-lead-copper, lens or

blanket type, volcanic hosted massive sulphide deposit. Ore is typically stratiform and

located in a favourable horizon usually located between submarine volcanic units. This

style of deposit is well documented in Eastern Australia with larger examples including

Captains Flat, Benambra, Rosebery, Hellyer, and Thalanga.



9 MINERALIZATION IN SITU MINERALIZATION The following description of the mineralization refers to the open pit and underground

mineralization from which the tailings were derived. The description is taken for the most

part from a report entitled “Woodlawn Exploration Project Technical Report NI 43-101”

prepared by Robin Rankin for Tri Origin and dated October 9, 2009.

Mineralization mined from the open pit and underground, from which the tailings were

derived, is polymetallic, and the predominant minerals extracted in the past were copper,

lead, and zinc, with accessory silver and gold. The mineralization is strictly within lens-

shaped lodes, subparallel to each other, occurring in a repetitious geometry, and dipping

to the northwest.

Mineralization in the underground Woodlawn deposit occurs in 10 main lenses, A

through J, and numerous smaller sub-lenses. The lenses are divided into two distinct

groups. The Main, or Eastern, Lenses, which consist of A, B, C, J, and associated sub-

lenses, comprise approximately 93% of the Woodlawn deposit. A smaller Western Lens

system comprising the D to I lenses occurs from 200 m to 500 m into the hangingwall

from the Main Lenses.

There are two major types of mineralization recognized at the Project, termed the

Copper Ore and the Complex Ore.

The Complex Ore comprises fine-grained, typically bedded massive sulphides containing

pyrite, sphalerite, galena, and chalcopyrite. Minor arsenopyrite, tetrahedrite, tennantite,

stannite, bismuthinite, marcasite, pyrrhotite, and electrum are also present. Gangue

minerals associated with the Complex Ore include talc, quartz, chlorite, phlogopite,

muscovite, and barite.

The Copper Ore occurs in a variety of styles as copper-rich mounds and as stockwork

vein-type mineralization with a pyrite-chalcopyrite assemblage together with lesser

sphalerite, galena, and pyrrhotite. Gangue minerals include chlorite, quartz, talc, calcite,

and barite. The copper-rich mounds are massive sulphide-rich zones, up to 80 m wide



and 20 m thick, with a heavily silicified central zone consisting of pervasive silica and

chalcopyrite veinlets. They are flanked by massive chalcopyrite-pyrite-chlorite-rich

mineralization. Beneath the copper-rich zones are zones of chalcopyrite-rich stockwork

mineralization, which are interpreted to represent feeder zones. Copper-rich

mineralization also occurs as stringers with quartz veins along some fault zones.

The massive sulphide lenses at Woodlawn are geochemically and mineralogically

zoned. The Main C Lens is geochemically zoned with higher copper grades at the

southern end of the lens and interfingering over several metres with a gradual change to

zinc, lead, silver, and gold grades to the north with related changes to the proportions of

chalcopyrite, galena, and sphalerite. Similar zonation is also observed, albeit more

locally, in the A and B lenses. This zonation is also apparent across dip with copper-rich

footwall progressing to zinc, lead, and precious metal–rich hanging wall. This zonation

style is typical of VMS deposits.

The zonation associated with the smaller Western lenses appears more complex and in

some cases nonexistent. Many of the Western Lenses also contain higher grades of

silver, gold, and lead when compared to the Main Lenses. The larger D Lens exhibits

similar zoning to the Main Lenses.

The presence of syn-tectonic and post-tectonic mineralization was recognized in parts of

the Woodlawn deposit and suggests late-stage remobilization of pre-existing sulphides

as a minor component to the Woodlawn deposit.

The location and dimensions of the mineralized zones are illustrated in Figures 9-1 and

9-2.

19,0

00m

E

19,2

00m

E

19,8

00m

E

19,6

00m

E

19,4

00m

E

20,0

00m

E2,800mRL

2,600mRL

2,200mRL

2,400mRL

2,000mRL

2,800mRL

Northwest

Southeast

I

D2

J

C1

B1

A

B5

E

D1

FG

H

2,600mRL

2,200mRL

2,400mRL

2,000mRL

0 50 200

Metres

100 150

December 2009


Mineralization Cross Section


Australia

Figure 9-1

SC

OT

TW

ILS

ON

RP

A

9-3

ww

w.sco

ttwilso

n.co

m

19,0

00m

E

19,2

00m

E

19,8

00m

E

19,6

00m

E

19,4

00m

E

2,800mRL

2,600mRL

2,200mRL

2,400mRL

2,000mRL

2,600mRL

2,200mRL

2,400mRL

2,000mRL

1,800mRL

I

D2

J

C

B1

A

B5

B8

E

D1

F

G H

0 50 200

Metres

100 150

December 2009


Mineralization Longitudinal


Australia

Figure 9-2

9-4




TAILINGS MINERALIZATION Mineralization of metals in the tailings material is obviously linked to the source ore from

the mine, predominantly zinc, copper, and lead–rich sulphides. Pyrite is the most

abundant sulphide. Estimated mineral compositions are:

Sphalerite 3-4% Galena 1-2% Chalcopyrite 1-2% Pyrite 30-35%

Other sulphide minerals occurring in minor to trace amounts are arsenopyrite,

tetrahedrite-tennantite, covellite, stannite, bismuthinite, marcasite, pyrrhotite, and

electrum.

Silicate gangue minerals are dominated by chlorite, talc, and micas. Minor quartz, rare

carbonate, magnetite, and barite also occur. The tailings would also contain a small

quantity of grinding media. No detailed information is available on relative percentages

of gangue minerals.

SIZE FRACTION DISTRIBUTION In July 1998, Tri Origin collected 128 samples from 36 drill holes and had them

screened, with the material from the six size fractions analyzed for Cu, Pb, Zn, Fe, Ag,

MgO, and S. The analyses were performed at Optimet Laboratories. The results

demonstrate a lower metal content in the >150 μm size fraction in all the dams. The

results from the TDN, TDS, and TDW are summarized in Table 9-1, Table 9-2, and

Table 9-3, respectively.



TABLE 9-1 SIZE FRACTION ANALYSIS - NORTH DAM Tri Origin Minerals Ltd. - Woodlawn Re-Treatment Project

Size Fraction Wt. % Cu Pb Zn Ag

(μm) (%) (%) (%) (g/t) <38 58.4 0.34 1.76 2.22 41.30

38-53 8.9 0.40 1.09 2.80 26.00 53-75 9.3 0.49 0.94 3.02 23.80

75-106 9.1 0.63 0.76 3.33 21.10 106-150 6.2 0.46 0.38 2.04 10.70

>150 8.1 0.18 0.15 0.47 3.80 100.0 0.38 1.32 2.29 31.54

TABLE 9-2 SIZE FRACTION ANALYSIS - SOUTH DAM Tri Origin Minerals Ltd. - Woodlawn Re-Treatment Project


(μm) (%) (%) (%) (g/t) <38 54 0.38 1.59 2.14 33.70

38-53 11 0.43 1.14 2.48 23.90 53-75 11.8 0.56 1.05 3.08 23.40

75-106 10.3 0.65 0.78 3.32 19.60 106-150 6.7 0.52 0.45 2.40 11.20

>150 7.2 0.19 0.17 0.62 4.40 101.0 0.43 1.23 2.34 26.67

TABLE 9-3 SIZE FRACTION ANALYSIS - WEST DAM Tri Origin Minerals Ltd. - Woodlawn Re-Treatment Project


(μm) (%) (%) (%) (g/t) <38 60.2 0.38 1.76 1.35 39.50

38-53 9.7 0.58 1.19 1.95 29.30 53-75 9.8 0.85 1.15 2.42 29.80

75-106 8.1 1.14 0.93 2.91 26.50 106-150 5.2 0.82 0.46 2.31 14.60

>150 6.9 0.22 0.18 0.60 4.80 99.9 0.52 1.40 1.64 32.78



10 EXPLORATION Exploration on the tailings dams comprised airborne topographic surveys as described in

Item 17, Mineral Resources, and drilling as described in Item 11, Drilling.



11 DRILLING The mineral resource and mineral reserve estimates for the tailings dams are based

exclusively on drilling. Drill hole data used for the resource estimate were collected over

several drilling campaigns that utilized different drilling methods. All available drilling data

have been used for the resource estimate.

Table 11-1 summarizes the various drill campaigns. Figure 11-1 shows the drill hole

location map.

TABLE 11-1 DRILLING SUMMARY Tri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

Date Company Hole Type TDN TDS TDW

Total Holes

Total Metres

May-Aug 88 Denehurst Core 21 4 25 178.2 May-95 Denehurst Core 15 15 168.5 Dec-05 Tri Origin Auger 3 2 3 8 44.5 Jan-07 Tri Origin Auger 23 25 48 141 Jan-07 Tri Origin Core 23 36 59 574.8 Dec-07 Tri Origin Core 29 7 36 286.5 Jul-08 Tri Origin Core 31 38 30 99 905.4 Total 84 112 94 290 2,299.4

Notes:

1. TDN - Tailings Dam North 2. TDS - Tailings Dam South 3. TDW - Tailings Dam West

Drilling in all the campaigns was vertical, i.e., at a high angle to the layers of tailings.

The collars were surveyed, but no downhole measurements were taken as the holes

were considered too short to experience significant downhole deviation.



Drillhole Location


Australia

Figure 11-1

11-2




DENEHURST CORE (1988) The 178.2 m of core drilling by Denehurst in 1988 represents approximately 8% of the

total drilling.

The samples were obtained by driving a 50 mm stainless steel tube column through the

tailings. Each tube was two metres m long and lengths were joined by a threaded

stainless steel coupling. A stainless steel cutting bit was attached to the first length.

Venus flytrap type catches were positioned at each joint to enable core recovery. The

column was driven through the tailings by a pulley-mounted 15 kg weight. This was

supported by a three metre apex high quadrapod on a three metre square platform. The

platform was mounted on drums to enable samples to be obtained from holes covered

by water. The core column was retrieved via a winch arrangement.

Survey records for this campaign were not available. The collar locations were digitized

from a Denehurst drill hole location map.

DENEHURST CORE (1995) Coastline Drilling from Queensland were contracted for the 1995 Denehurst program.

The drilling method was similar to the vibratory core method used for the Tri Origin

campaigns.

Only 15 holes of the planned 19 holes were drilled due to access difficulties. The 15

holes were drilled on TDS and ranged from five metres to 14 m deep. The drilling

represents approximately 7% of the total drilling used for mineral resource estimation.

Survey records for this campaign were not available. The collar locations were digitized

from a Denehurst drill hole location map.

TRI ORIGIN AUGER DRILLING (2005, 2007) Auger drilling was contracted to GOS Drilling using a power auger rig mounted on a

Toyota Land Cruiser. Auger holes were 75 mm in diameter. Most of the auger holes

drilled to only three metres. This method of drilling accounted for approximately 8% of

the mineral resource database.



Sample recoveries were estimated by measuring the weight of the sample and

comparing that to the expected weight extracted from the drilled run, based on volume

and average wet densities. This indicated that all samples had greater than 90%

recovery.

Auger holes were either surveyed with a hand-held GPS, or, where they were drilled

adjacent to a Tri Origin cored hole, a constant offset of approximately 1.5 m west and 1.5

m south was used. This was then applied to the Vibracore hole co-ordinates to estimate

the auger hole co-ordinates.

TRI ORIGIN CORE (2007, 2008) Core Drilling for the three Tri Origin campaigns was contracted to Numac Drilling with a

Geoprobe 6620DT rig utilizing the Vibracore method. The hole diameter was 50 mm.

Hole depths ranged from 2.7 m to 18 m. The Vibracore rig was found to be an ideal

machine for drilling the tailings due to the low load bearing capacity of the rig, quality of

sample achieved, and excellent productivity.

The Geoprobe drill used the Dual Tube Sampling System. This is a very efficient

method for collecting continuous soft cores with the added benefit of a cased hole. Dual

tube sampling uses two sets of probe rods to collect continuous core.

The method is similar to wire-line diamond core drilling. However, as opposed to rod

rotation, the outer rod string is vibrated by rapid hammering. The drilled sample reports

to a 1.5 m long PVC tube housed in a 1.5 m long sample rod. The sample rod string is

recovered through the outer rod/casing string which remains in the ground until the hole

is completed.

Drill hole collars were set out using a hand-held GPS with an accuracy of approximately

± 5.0 m. After drilling the Vibracore hole, the drill collars were flagged and labelled, and

surveyed by a qualified surveyor using a Differential GPS with an accuracy of 10 cm.

Collar points for three core holes were derived by hand-held GPS as these holes were

missed by the surveyor.



12 SAMPLING METHOD AND APPROACH The various drilling campaigns are described in Item 11, Drilling. The sampling method

and approach for each program is described here. The minimum, maximum, and

average sample lengths for all the programs were 0.4 m, 3.4 m, and 2.0 m, respectively.

DENEHURST CORE (1988) The sample was retrieved from the pipe lengths by ramming a disc down the tube and

laying the core in halved poly pipes. Sections were then collected, typically 1.5 m to 2.5

m long, and placed in plastic buckets. The length of sections was dependent on the total

length recovered. Sample intervals for assay ranged from 0.4 m to 3.4 m. The average

and median sample length was approximately 2.2 m.

Samples from the buckets were then thoroughly mixed using a spade on a clean

concrete surface. A representative sample was collected by quartering and then placed

in an oven. Wet and dry weights were taken to calculate the moisture content. Excess

sample was bagged and stored.

DENEHURST CORE (1995) The sampling procedure was similar to the 1988 program except that the sample interval

was one metre.

TRI ORIGIN AUGER DRILLING (2005, 2007) Sampling was undertaken on nominal three metre intervals with most of the auger holes

drilled to only three metres.

The drilled tailings were regularly collected from around the hole collar as it returned up

the auger flight. Systematic grab samples were gathered and placed into a calico bag for

dispatch to the laboratory. The calico samples typically weighed around two to four

kilograms. The reject sample was placed into a bucket for storage.



TRI ORIGIN CORE (2007, 2008) Sampling intervals comprised two drill rods lengths of 1.2 m each, i.e., 2.4 m, until the

end of the hole was reached. The first sample was 2.7 m due to using a 1.5 m starter

rod.

The PVC tube was extracted from the sample rod and split with a cutter. The exposed

tailings core was halved with a knife and placed in a calico bag. The other half of the

core from the cut tube is placed in a large plastic bucket and sealed with a snap lid. The

bucket and calico sample were weighed together.



13 SAMPLE PREPARATION, ANALYSES AND SECURITY The various drilling campaigns are described in Item 11, Drilling. The sample

preparation and analyses for each program are described here.

DENEHURST CORE (1988) All Denehurst sample preparation and analyses were done by Woodlawn technical staff

and assaying was performed in the onsite laboratory. The laboratory was accredited by

the National Association of Testing Authorities (NATA), Australia’s national laboratory

accreditation authority.

The dried samples were split for sizing and assay. Samples for assay were pulverized

and then analyzed by X-ray fluorescence (XRF) for Cu, Pb, Zn, Fe, and Ag. Non-

sulphide Pb and Zn determinations were made by Ammonium Acetate solubility. Gold

assays, where required, were by fire assay. Size fraction assays were performed to

indicate the distribution of metal values by size. Where sample was not sufficient for

assay by XRF, atomic absorption spectroscopy (AAS) was used.

DENEHURST CORE (1995) Samples from the 1995 drilling program were pulverized and then acid digested for AAS

analysis of Cu, Pb, Zn, and Ag. Au was not determined. Another portion of sample was

compressed for XRF determination for Mg, Fe, and Si.

TRI ORIGIN (ALL) All of Tri Origin’s samples were analyzed by ALS Chemex (ALS) in Orange, NSW.

All samples were weighed upon receipt and dried for 24 hours. The whole sample was

pulverized to 80% passing 75 microns. Assay charges were extracted from a 100 g

pulp.

The pulps were placed in kraft packets and the remaining pulverized bulk residue was

placed back into the original calico bag.



A combination of inductively coupled plasma–atomic emission spectroscopy (ICP-AES)

and fire assay for gold were used. All methods can be considered as total extraction for

the elements requested. The ALS Chemex assay methods are summarized in Table

13-1.

TABLE 13-1 ALS CHEMEX ASSAY METHODS

Tri Origin Minerals Limited – Woodlawn Tailings Retreatment Project

Program Elements and ALS Method ALS Job No.

January 2007

Ag, As, Bi, Cd, Cu, Fe, Pb, S, Sb, Zn, Al, Mg, Ca and Na by ME-OG62 Au by Au-AA25

OR07010065

December 2007

Ag, As, Bi, Cd, Cu, Fe, Pb, S, Sb, Zn, Al, Mg, Ca and Na by ME-OG62 Au by Au-AA25

OR07154119

July 2008

Ag, Cu, Pb, Zn, Fe, S by ME-OG62 Au by Au-AA25 Al2O3, As, CaO, Co, Cr2O3, Cu, Fe2O3, K2O, MgO, MnO, Ni, P2O5, Pb, S, SiO2, TiO2, Zn by ME-ICP81x

OR08098978

ME-OG62 A 0.5 sample undergoes four acid digestion. The mixture is then evaporated to moist

salts, cooled, and leached with concentrated HCL. It is then diluted to 100 mL volume at

20% HCL. Elemental concentrations are then determined by ICP-AES.

AU-AA25 A 30 g sample is fused with fluxes including PbO at 1,100°C. The molten PbO acts as a

collector for Au. The fused mass is cooled and the lead separates from the impurities

and is placed in a cupel in a furnace at 900°C. The lead oxidizes, being absorbed by the

cupel, leaving a bead (prill) of gold, silver (added as a collector) and other precious

metals. The prill is dissolved in aqua regia and gold concentration is determined by flame

AAS.

ME-ICP81X A 0.1 g sample undergoes fusion by sodium peroxide. The fused mass is leached in

water and acidified with hot HCL. The solution is cooled and then analyzed by ICP-AES.

This method was used to primarily obtain some SiO2 data.



DENSITY The method for determining the bulk density of the tailings has varied over several drill

campaigns and has occasional issues. However, the favourable agreement between the

tonnage estimated by block models and the tonnage reported by historical records

indicates that the bulk densities in the block model mineral resource and mineral reserve

estimates are appropriate.

TRI ORIGIN – JULY 2008 The sample was placed into a plastic bucket. The height of the sample was measured

and the volume was calculated knowing the diameter of the bucket. The sample was

weighed on a calibrated electronic scale and the weight was corrected for the weight of

the bucket. The resultant weight/density was the wet density.

Approximately one half of the samples were dried and weighed to estimate the dry

density. The wet weight/dry weight ratio was used to estimate the dry density.

TRI ORIGIN – PRE-JULY 2008 The sample length was measured in the drill tube and the volume was estimated

knowing the diameter of the drill tube. The sample was placed in a bucket and weighed,

and the weight was corrected for the weight of the bucket. The resultant weight/density

was the wet density.

Approximately one half of the samples were dried and weighed to estimate the dry

density. The wet weight/dry weight ratio was used to estimate the dry density.

DENEHURST The method for density determination of the Denehurst is not known.



14 DATA VERIFICATION QUALITY ASSURANCE/QUALITY CONTROL Quality assurance/quality control (QA/QC) consists of evidence to demonstrate that the

assay data has precision and accuracy within generally accepted limits for the sampling

and analytical method(s) used in order to have confidence in the resource estimation. In

general, QA/QC programs are designed to prevent or detect contamination and allow

assaying (analytical) precision (repeatability) and accuracy to be quantified.

The Tri Origin QA/QC program included the insertion of standard reference samples,

blank samples, and duplicate samples into the sample stream. In Scott Wilson RPA’s

opinion, the program was consistent with generally accepted industry standards.

In Scott Wilson RPA’s opinion, the results of the QA/QC program indicate that the data

are reliable and appropriate for mineral resource estimation.

STANDARD SAMPLES Tri Origin used three certified reference samples, purchased from Geostat Pty Ltd.

(Geostat), to check the accuracy of the ALS laboratory. One Au reference was inserted

into the sample stream at the rate of one per twenty samples. One base metal reference

was inserted at the rate of one every ten to twenty samples. The specifications of the

reference samples are summarized in Table 14-1.

TABLE 14-1 STANDARD REFERENCE SAMPLE SPECIFICATIONS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Sample No. Grade Std. Dev

BML 1.48% Cu 0.065 2.67% Pb 0.180 2.04% Zn 0.091

BMH 1.42% Cu 0.052 0.061% Pb 0.0025 5.05% Zn 0.223

AuS 0.50 g/t Au 0.03



The assay results of the standard reference samples should fall within two standard

deviations of the round robin results for the sample. One Zn assay and one Pb assay

were outside the acceptable range. No action was taken as the other elements for the

same sample were in compliance. Scott Wilson recommends that entire batches of

samples should be reassayed when any element is outside the acceptable range.

Considering the very low failure rate, Scott Wilson considers that the results of the

standard reference sample program indicate superior data verification.

The Cu, Pb, and Zn results for standard reference sample BML are illustrated in Figures

14-1, 14-2, and 14-3, respectively.

FIGURE 14-1 STANDARD SAMPLE BML - CU



FIGURE 14-2 STANDARD SAMPLE BML - PB

FIGURE 14-3 STANDARD SAMPLE BML – ZN



The Cu, Pb, and Zn results for standard reference sample BMH are illustrated in Figures

14-4, 14-5, and 14-6, respectively.

FIGURE 14-4 STANDARD SAMPLE BMH – CU

FIGURE 14-5 STANDARD SAMPLE BMH – PB



FIGURE 14-6 STANDARD SAMPLE BMH – ZN

The Au results for standard reference sample AuS are illustrated in Figure 14-7.

FIGURE 14-7 STANDARD AUS- AU

BLANK SAMPLES Certified blank samples, purchased from Geostat, were inserted in the sample stream at

the rate of one per twenty samples to check for drift and contamination in the ALS

laboratory. The assays should not exceed three times the detection limit for the assay



method. Thirty-two blank samples were submitted, with only one sample returning non-

compliant results for Zn. The results of the blank sample program are illustrated in

Figure 14-8.

FIGURE 14-8 BLANK SAMPLES

DUPLICATE SAMPLES Duplicate samples comprise half or quarter core samples taken at the rate of

approximately one per twenty samples for a total of forty samples. The results of the

duplicate samples compare well with the originals. The mean values of the original and

duplicate samples range from 98.9% to 100% agreement, as summarized in Table 14-2.

The R2 values for Cu and Pb are high at approximately 0.95, whereas the R2 value for

Zn is lower at 0.71. In Scott Wilson RPA’s opinion, despite the poor correlation for Zn,

the good agreement of the mean values for Cu, Pb, and Zn and the good correlation for

Cu and Pb indicates superior data verification.



TABLE 14-2 DUPLICATE SAMPLES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Metal Mean

Original Duplicate Dup/Orig R2 (%) (%) (%)

Cu 0.550 0.547 99.5 0.956 Pb 1.657 1.639 98.9 0.947 Zn 2.610 2.610 100.0 0.706

FIGURE 14-9 DUPLICATE SAMPLES – CU



FIGURE 14-10 DUPLICATE SAMPLES – PB

FIGURE 14-11 DUPLICATE SAMPLES – ZN

In Scott Wilson RPA’s opinion, the results of the QA/QC program indicate that the data

are reliable and appropriate for mineral resource estimation.



TWINNED HOLES In 2008, Tri Origin twinned a series of holes to verify the results of historical drilling and

to test the short range grade variation. Twin holes were drilled within one metre to two

metres of previous holes.

SOUTH DAM Four holes were drilled in the TDS by Tri Origin to verify the data from the 15 holes

previously drilled by Denehurst in 1988 and 1995. The Tri Origin holes returned higher

Cu and Ag values but demonstrated excellent agreement for Pb and Zn. The results are


TABLE 14-3 TWINNED HOLES - SOUTH TAILINGS DAM – DENEHURST Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Hole Depth Ag Au Cu Pb Zn

(m) (g/t) (g/t) (%) (%) (%) STD080 14.0 16.36 0.39 1.05 2.64 TDS052 14.0 27.21 0.27 0.45 1.18 2.92 Diff (%) 166 N/A 115 113 110

STD023 5.1 36.54 0.50 1.30 2.55 TDS006 9.1 24.55 0.22 0.42 1.05 2.27 Diff (%) 67 N/A 83 81 89

STD068 11.0 26.27 0.49 1.43 2.67 TDS062 10.0 28.55 0.25 0.45 1.36 2.51 Diff (%) 109 N/A 91 95 94

STD074 8.0 15.50 0.42 1.14 2.37 TDS079 5.9 34.31 0.41 0.77 1.27 2.16 Diff (%) 221 N/A 184 112 91

Denehurst 38.1 21.74 0.44 1.21 2.58 Tri Origin 39.0 28.01 0.27 0.49 1.21 2.55 Diff (%) 129 N/A 111 100 99

Notes: 1. STD prefix denotes Denehurst hole. 2. TDS prefix denotes Tri Origin hole.

Three twinned holes were drilled in the TDS to verify data from previous Tri Origin

campaigns and to test the short range grade variation. The 2008 twinned holes show



excellent agreement for Cu, Pb, Zn, and Ag compared to holes drilled in 2007. The

results are summarized in Table 14-4.

TABLE 14-4 TWINNED HOLES - SOUTH TAILINGS DAM – TRI ORIGIN

Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Hole Depth Ag Au Cu Pb Zn (m) (g/t) (g/t) (%) (%) (%) TDS022-07 12.3 28.61 0.25 0.50 1.19 2.55

TDS081-08 11.5 29.26 0.29 0.50 1.21 2.57 Diff (%) 102 116 99 102 100

TDS014-07 9.6 31.30 0.22 0.42 1.21 2.32

TDS080-08 9.8 33.27 0.35 0.46 1.33 2.54

Diff (%) 106 161 110 110 110

TDS029-07 14.2 33.08 0.26 0.49 1.32 2.73

TDS069-08 14.7 32.52 0.29 0.42 1.24 2.66 Diff (%) 98 113 86 93 98

Tri Origin 07 36.1 31.08 0.24 0.47 1.25 2.56

Tri Origin 08 36.0 31.68 0.31 0.46 1.25 2.60

Diff (%) 102 126 96 100 101 NORTH DAM In the TDN, 13 of the 21 holes previously drilled by Denehurst were twinned, primarily to

ascertain the retreated-untreated boundary. Overall, the twinned holes returned Cu, Pb,

Zn, and Ag values approximately 20% to 30% lower than the original Denehurst holes

drilled prior to retreatment of the upper portion of the dam.

Grades in the lower sections of the holes agreed much better although a precise

comparison was not undertaken.

WEST DAM Six twinned holes were drilled in the TDW to verify data from previous Tri Origin

campaigns and to test the short range grade variation. The 2008 twinned holes show

excellent agreement for Cu, Pb, Zn, and Ag compared to the original drilling. The results

are summarized in Table 14-5.



TABLE 14-5 TWINNED HOLES - WEST TAILINGS DAM – TRI ORIGIN Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Hole Depth Ag Au Cu Pb Zn (m) (g/t) (g/t) (%) (%) (%) TDW010 13.5 34.53 0.39 0.70 1.50 1.75 TDW055 13.1 36.81 0.38 0.74 1.55 1.87 Diff (%) 107 96 106 103 107 TDW059 16.5 42.16 0.52 0.54 1.58 2.10 TDW036 18.3 33.62 0.42 0.50 1.31 1.83 Diff (%) 80 80 93 83 87 TDW021 7.5 41.56 0.24 0.72 1.60 2.07 TDW021A 7.5 41.24 0.48 0.76 1.74 2.38 Diff (%) 99 204 106 109 115 TDW053 8.7 35.68 0.27 0.38 1.45 1.74 TDW053A 4.0 32.90 0.28 0.44 1.47 1.56 Diff (%) 92 104 113 102 89 TDW057 12.3 35.46 0.39 0.58 1.45 1.82 TDW057A 11.8 37.34 0.40 0.64 1.50 1.98 Diff (%) 105 100 110 103 109 TDW065 8.4 36.57 0.45 0.59 1.44 1.90 TDW065A 9.9 38.27 0.43 0.64 1.51 1.96 Diff (%) 105 96 108 105 103 Total Original 66.9 37.78 0.40 0.59 1.51 1.90 Total Twinned 64.6 36.50 0.41 0.62 1.48 1.93 Diff (%) 97 102 106 98 102



15 ADJACENT PROPERTIES There are no adjacent properties as defined by NI 43-101.



16 MINERAL PROCESSING AND METALLURGICAL TESTING PLANT BACKGROUND The original process plant at Woodlawn operated from 1978 until early 1998. As well, a

tailings retreatment plant was in operation from 1991 to 1996.

The plant produced three concentrates – copper, lead, and zinc – utilizing crushing,

grinding, and differential flotation at an annual operating rate ranging from 650,000 to 1

million tonnes of ore.

The original tailings retreatment plant was designed to produce only a zinc concentrate.

The plant was shut down in 1996 as there were operating issues related to feed density,

tailings material slumping issues when dredging, as well as consistent failure to meet

grade, recovery, and throughput expectations. Table 16-1 shows a typical metallurgical

balance reported for the plant in 1993. A typical balance for the tailings retreatment plant

in the same year is shown in Table 16-2.

TABLE 16-1 WOODLAWN PLANT METALLURGICAL BALANCE 1993 Tri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

Product Grade Recovery (%)

% Cu %Pb %Zn Cu Pb Zn

Feed 1.9 3.9 10.5 100 100 100

Copper Concentrate 20.8 3.9 4.8 69.3 6.3 2.9

Lead Concentrate 0.7 40.0 19.7 1.7 50.2 9.2

Zinc Concentrate 0.5 1.5 50.6 3.8 5.9 74.3

Final Tails 0.6 2.0 1.9 25.2 37.6 13.6



TABLE 16-2 TAILINGS RETREATMENT PLANT METALLURGICAL BALANCE 1993

Tri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

Product Grade Recovery (%)

% Cu %Pb %Zn Cu Pb Zn

Feed 0.42 1.30 3.07 100.0 100.0 100.0

Zinc Concentrate 1.81 7.05 43.85 16.0 20.1 52.9

Final Tails 0.37 1.08 1.50 84.0 79.9 47.1

METALLURGICAL TESTWORK The testwork program started in late 2005 and was carried out in four phases at Optimet

Laboratories in South Australia and AMMTEC Limited (AMMTEC) in Perth.

Phase 1 metallurgical testwork was conducted on samples obtained from the TDN, TDS,

and TDW.

This was followed by the Phase 2 testwork during which a circuit very similar to the

original fresh ore circuit, but with fine grinding of the original tailings, was identified as

being capable of producing copper, lead, and zinc concentrates.

Phase 3 optimization testwork concentrated on good copper/lead separation and on

optimizing reagents and their usage.

Phases 2 and 3 were conducted on drilled and blended samples from TDS and TDW.

Phase 4 of the testwork was designed to assess physical parameters using large

samples. This included thickening and filtration tests as well as extra grinding testwork,

including the use of various water sources.

The results of the testwork indicated that a primary grind of 80% passing 30 microns

would be the optimum. It was also determined that a differential flotation circuit, similar to

the original plant producing a talc concentrate (for removal to tailings), a copper



concentrate, and a zinc concentrate, was required, including a concentrate regrind unit

for the lead and zinc flotation circuits.

RETREATMENT PLANT PROCESS DESCRIPTION Based on the metallurgical testwork, the following flowsheet, as shown in Figure 16-1, is

proposed for the tailings retreatment plant.

The hydraulically mined slurry is pumped to a tailings thickener. The thickener underflow

at 60% solids is pumped to a storage tank prior to be ground in a fine grinding mill. The

thickener overflow water is returned to the tailings area for use as medium for the

hydraulic miners.

The fine grinding mill equipment was originally planned to be an ISA mill but

subsequently replaced by a Deswik grinding mill, which is supposedly more economical

to operate as it requires less input power to achieve the P80 30 micron grind than the ISA

mill. Further testwork is required in this area, as the Deswik mill is fairly new to the

market and has had limited commercial use.

The ground mill product then reports to the talc flotation stage to remove a talc

concentrate, which is combined with the final tails and sent to the tailings storage area.

The talc flotation tailings report to the copper flotation area, which produces a copper

concentrate using a roughing stage and two cleaning stages. No regrind is required in

this unit operation. The final copper concentrate is pumped to a thickener and the

underflow is sent to a filter for dewatering and then placed on a concentrate stockpile.

The tailings from the rougher and cleaner stages are pumped to a lead rougher circuit.

The rougher concentrate is sent to a Stirred Media Detritor (SMD) regrind mill, operating

in closed circuit with cyclones. The required grind is a P80 of 15 microns, with a specific

grinding power requirement of 15.7 kWh/t. The cyclone overflow reports to a two stage

lead cleaning circuit. The final lead concentrate is pumped to a thickener and the

underflow is sent to a filter for dewatering and then placed in a concentrate bin, rather

than a stockpile, to minimize health hazards related to potential lead dust in air.

Reclaim Tailings Area

(TDS,TDW,TDN)

Storage Tank

Tailings Thickener

Pb Rougher

Pb RegrindMill (SMD)

Cyclone

Pb Cleaner

Pb Recleaner

Pb Concentrate Filter

Pb ConcentrateThickener

Cu Rougher

Cu Recleaner

Cu Cleaner

Cu Concentrate Filter

Cu ConcentrateThickener

Reclaim Monitors

Regrind Mills(2)(Deswik)

Talc Flotation

Zn Rougher

Zn RegrindMill (SMD)

Cyclone

Zn 1 Cleaner

Zn 2 Cleaner

Zn 3 Cleaner

Zn 4 Cleaner

Zn ConcentrateThickener

Zn Re-treatRougher

Zn Re-treat 3Cleaner

Zn Concentrate Filter



New Tails Dam

Zn Concentrate Stockpile

Pb ConcentrateLoadout Bin

st

nd

rd

th

rd

Cu Concentrate Stockpile

nd

st

PB Loadout Bin

Zn/Cu LoadoutBin

Pb

Cu

ConcentrateContainer

Zn



To Harbour by TruckContainer Loader

December 2009


Retreatment Plant Flowsheet


Australia

Figure 16-1

16-4




The lead rougher tails report to the zinc rougher circuit, while the lead cleaner and

recleaner tails report to the zinc retreat flotation circuit described later.

The concentrate from the zinc rougher circuit goes through four stages of cleaning to

provide a final concentrate. The tails from the first three cleaner stages are sent to a

SMD regrind mill, operating in closed circuit with cyclones. The required grind is a P80 of

15 microns, with a specific grinding power requirement of 20.1 kWh/t. The fourth cleaner

tails are recirculated back to the third cleaner. The cyclone overflow reports to the zinc

retreat circuit as does the lead cleaner and recleaner tails. The circuit is made up of a

roughing stage, followed by three stages of cleaning, operating in closed circuit. The

final concentrate is combined with the concentrate from the cleaner circuit and pumped

to a thickener. The underflow is sent to a filter for dewatering and then placed on a zinc

concentrate stockpile. The tails from the zinc rougher are combined with the talc

concentrate and pumped to a new tailings storage area in the existing tailings area.

Copper and zinc concentrates are reclaimed by front end loader and fed to a container

loader capable of filling standard 20 ft shipping containers. The lead concentrate reports

directly to the loader to minimize handling and lead dust generation. The containers are

stored onsite and periodically shipped by truck to tidewater for shipment to smelters.

A proposed process plant layout is shown in Figure 16-2.

11,000m E

LOADED CONCENTRATE

CONTAINERS

OVERHEAD PIPE RACK

19,7

00m

N19,6

00m

N19,5

00m

N

PORTABLE

WATER TANK

RAW

WATER

TANK

WATER TREATMENT FACILITY

CONCENTRATE

FILTER

BUILDING

11,100m E

PROCESS

WATER DAM

10,800m E 10,900m E

REAGENT

STORE

SWITCH

ROOM

PLANT

MCC

CONTROL

ROOM

FLOTATION

REAGENTS

CHANGE ROOM

& ABLUTIONS

STORE

GATEHOUSE

20 VEHICLE

CAR PARK

PLA

NT

NO

RT

H

PLANT

WORKSHOP

RETREATMENT

THICKENING PIPE RUN

UNDERGROUND

IN CULVERT

CONTAINER

LOADING

AIR SERVICESRETREATMENT

GRINDING

EMPTY

CONCENTRATE

CONTAINERS

19,7

00m

N19,6

00m

N19,5

00m

N

10,800m E 10,900m E

0 20 100

Metres

40 60 80

December 2009 Source: Intermet Engineering, 2009.


Retreatment Plant Layout


Australia

Figure 16-2

SC

OT

TW

ILS

ON

RP

A

16-6

ww

w.sco

ttwilso

n.co

m



17 MINERAL RESOURCE AND MINERAL RESERVE ESTIMATES MINERAL RESOURCES

SUMMARY Mineral resources were estimated by GeoRes effective May 2008 and reviewed by Scott

Wilson RPA. Scott Wilson RPA generally concurs with the GeoRes estimate, however,

in Scott Wilson RPA’s opinion, the inferred mineral resources as estimated by GeoRes

should be reclassified as indicated mineral resources. The mineral resources as revised

by Scott Wilson RPA are summarized in Table 17-1.

TABLE 17-1 MINERAL RESOURCES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Classification Tonnes Grade Cu Pb Zn Ag Au (Mt) (%) (%) (%) (%) (%)

South Measured 2.43 0.48 1.19 2.60 24.60 0.22 (TDS) Indicated 2.07 0.48 1.19 2.39 23.50 0.22 Meas + Ind 4.50 0.48 1.19 2.50 24.10 0.22 West Measured 2.05 0.60 1.46 2.00 35.66 0.39 (TDW) Indicated 2.02 0.60 1.50 1.91 36.17 0.39 Meas + Ind 4.07 0.60 1.48 1.95 35.91 0.39 North - Treated Measured 0.56 0.36 1.07 1.77 28.60 0.27 (TDNU) Indicated 1.11 0.33 1.16 1.78 31.41 0.23 Meas + Ind 1.67 0.34 1.13 1.78 30.47 0.24 North - Untreated Measured 0.27 0.58 2.17 3.54 49.70 0.33 (TDNL) Indicated 1.14 0.47 1.63 3.06 45.92 0.32 Meas + Ind 1.41 0.49 1.73 3.15 46.65 0.32 All Dams Measured 5.31 0.52 1.33 2.33 30.57 0.30 Indicated 6.34 0.49 1.36 2.25 32.96 0.29 Meas + Ind 11.65 0.50 1.35 2.29 31.87 0.30

Notes: 1. CIM definitions were followed for mineral resources. 2. Mineral resources were estimated at a zero cut-off grade. 3. Mineral resources are inclusive of mineral reserves. 4. Mineral resources were estimated using bulk density of 1.7 t/m3 for TDS, 1.85 t/m3 for TDW, 1.6

t/m3 for TDNU, and 1.35 t/m3 for TDNR. 5. Columns and rows may not add exactly due to rounding.



DATABASE The database for mineral resource estimation is exclusively drilling. The description of

the drilling, sampling, analyses, and data verification is found in items 11, 12, 13, and 14

of this report.

STATISTICS The simple statistics for Cu, Pb, Zn, Ag, and Au in all the dams are summarized in Table

17-2.

TABLE 17-2 RAW ASSAY STATISTICS

Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Cu (%)

Pb (%)

Zn (%)

Ag (g/t)

Au (g/t)

Maximum 3.32 15.80 13.00 159.00 0.67 Minimum 0.06 0.11 0.24 3.00 0.01

Mean 0.50 1.35 2.44 31.54 0.31 Median 0.47 1.30 2.23 30.00 0.28 Std Dev 0.23 0.73 0.96 15.10 0.13

Coeff Var 0.48 0.56 0.43 0.50 0.46

The grade distribution of Cu, Pb, Zn, and Ag is illustrated in Figures 17-1, 17-2, 17-3,

and 17-4, respectively.

FIGURE 17-1 HISTOGRAM – CU



FIGURE 17-2 HISTOGRAM – PB

FIGURE 17-3 HISTOGRAM – ZN



FIGURE 17-4 HISTOGRAM – AG

CAPPING HIGH GRADE ASSAYS Based on the normal grade distribution, low coefficient of variation, and the coincidence

of mean and median grades, high grade assays did not require capping. Scott Wilson

RPA concurs with this approach.

COMPOSITING Sample lengths were composited to one metre downhole, starting from the collar, for

modelling. However, two metre composites were used for variography. In Scott Wilson

RPA’s opinion, the composite length should be approximately equal to the average

sample length, i.e., two metres. In any case, using a composite length less than the

sample length does not affect the integrity of the model.

DENSITY The density of each domain (individual tailings dam) was modelled based on dry density

data from individual drill hole samples. The resultant average density of each domain is




TABLE 17-3 DENSITY Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Density

(t/m3) South 1.70 West 1.85 North - Untreated 1.60 North - Retreated 1.35

CUT-OFF GRADE There was no cut-off grade applied to the mineral resource estimation, as the mining

method is not selective and, with the exception of tailings in local topographic lows at the

bottom of the dams, all the material will be processed.

BLOCK MODEL The mineral resources were estimated using a block model methodology with Minex

geology and mining software. Four individual domains were created: South Dam (TDS),

West Dam (TDW), North Dam – Untreated (TDNL), and North Dam – Retreated (TDNU).

Volumes for the domains are based on the following surfaces:

• Upper surfaces based on September 2004 airborne survey.

• Lower surfaces based on actual topography prior to production.

• North Dam untreated and retreated interface based on interpretation from drilling.

The volumes were filled with blocks and the blocks were designated as either inside or

outside the domain depending on the location of the centroid. The dimensions of the

models and blocks are summarized in Table 17-4.



TABLE 17-4 BLOCK MODEL DIMENSIONS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Parameter Direction

X Y Z Origin (m) 9,660 17,060 2,760 Extent (m) 1,840 1,660 80 Primary Block Size (m) 10 10 1 Sub-blocking factor 1 1 1 Min Sub-block Size 10 10 1 Blocks: Max Primary 184 166 80 Blocks: Actual Primary 73,052 Blocks: Actual Total 73,052 Rotation (deg) 0 0 0

GRADE INTERPOLATION Grade interpolation was by inverse distance squared (ID2). Search distances and

directions were selected based on Zn variography. The grade statistics of the 73,052

blocks in the model are summarized in Table 17-5. The grade statistics of the blocks

compare favourably with the statistics of the raw data (Table 17-2). In Scott Wilson

RPA’s opinion, this agreement validates the integrity of the GeoRes mineral resource

block model.

TABLE 17-5 BLOCK MODEL STATISTICS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Cu Pb Zn Ag Au (%) (%) (%) (g/t) (g/t)

Maximum 2.44 10.55 9.32 115.32 1.08 Minimum 0.22 0.55 1.14 6.81 0.08

Mean 0.49 1.33 2.28 31.4 0.29

MINERAL RESOURCE CLASSIFICATION GeoRes classified the mineral resources based on the distance from a block to the

nearest data point and a minimum number of data points. The parameters are




TABLE 17-6 GRADE INTERPOLATION PARAMETERS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Classification Distance No. of Points

(m) Measured <70 >9 Indicated >70<120 >6<9 Inferred >120 >1<6

GeoRes classified approximately 20% of the blocks as inferred mineral resources, as

they were beneath standing water where drilling was not done. In Scott Wilson RPA’s

opinion, this material should be upgraded to indicated mineral resources. The tonnage

is virtually certain, as it lies within the surveyed surfaces. The total tonnage in the block

model also reconciles well with the tonnage historically reported by mill. The grade of

the tailings is sufficiently homogeneous that grades should be extrapolated over long

distances, i.e., greater than 120 m. Therefore, Scott Wilson RPA has classified the

entire volume of tailings as measured and indicated mineral resources (see Table 17-1).

MINERAL RESOURCE VALIDATION SUPPLEMENTARY BLOCK MODEL In July 2008, Tri Origin drilled an additional 99 holes in an attempt to improve the

understanding of the grade distribution and validate the GeoRes mineral resource

model. In December 2008, using the supplementary drilling, Bob Cotton, Geology

Consultant, estimated mineral resources at the Project using Micromine software and

virtually the same parameters and methodology as the GeoRes estimate. Cotton

classified approximately 15% of the blocks as inferred mineral resources. As per the

previous discussion, Scott Wilson RPA considers this material to be indicated mineral

resources. The Cotton December 2008 mineral resource estimate for all the dams,

including the Scott Wilson RPA reclassification is summarized in Table 17-7.



TABLE 17-7 VALIDATION BLOCK MODEL – DECEMBER 2008 Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Classification Tonnes Grade

Cu Pb Zn Ag Au (Mt) (%) (%) (%) (%) (%)

Measured 6.54 0.50 1.35 2.32 33 0.32 Indicated 4.71 0.53 1.33 2.31 31 0.30 Meas + Ind 11.25 0.51 1.34 2.31 32 0.31

Compared to the May 2008 estimate, the December 2008 compares to within 3% of the

tonnes and 1% of the grades. Scott Wilson RPA considers this as acceptable validation

of the official May 2008 estimate.

RECONCILIATION TO PRODUCTION Historical Denehurst mill reports indicate that from 1978 to 1982 inclusive, approximately

2.9 Mt of tailings grading 3.3% Zn were placed in the TDN. The tonnage compares

reasonably well with the current estimate of 3.1 Mt. The current grade of 2.41% Zn is

lower than reported by the mill, as approximately 2.0 Mt of tailings from the TDN were

retreated and redeposited.

The TDS was used for tailings from 1982 to 1989. Tonnage records are slightly

contradictory and range from 4.0 Mt to 4.6 Mt grading 2.51% Zn. The tonnage and

grade agree reasonably well with the current estimate of 4.5 Mt grading 2.50% Zn.

From 1989 through 1998 until the mine closed, approximately 4.0 Mt of tailings were

placed in the TDW. No grade information was available for the TDW. The tonnage

estimate compares well with the current estimate of 4.1 Mt.

MINERAL RESERVES The GeoRes mineral resource model was converted to a Surpac model for mine

planning. The review of the resource block model showed some blocks that would not

be recoverable by the proposed hydraulic mining method. The block model was

modified to exclude these blocks. The resource block model was then adjusted to allow

for dilution and recovery. Mining recovery was based on an average expected loss of 20

cm of tailings material in contact with other material. Additionally, a dilution value



equivalent to 10 cm average vertical gain was added back to the product stream, with no

grade to account for potential contamination from the original ground surface. The

remaining mineralization was included in an economically viable life of mine plan and, in

Scott Wilson RPA’s opinion, constitute mineral reserves as summarized in Table 17-8.

TABLE 17-8 MINERAL RESERVES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Classification Tonnes Grade

Cu Pb Zn Ag Au (Mt) (%) (%) (%) (%) (%)

South Proven 2.43 0.47 1.15 2.52 23.89 0.21 Probable 1.86 0.47 1.15 2.32 22.86 0.21 Prov + Prob 4.29 0.47 1.15 2.43 23.44 0.21 West Proven 2.05 0.59 1.42 1.94 34.63 0.36 Probable 1.88 0.59 1.46 1.85 35.08 0.36 Prov + Prob 3.93 0.59 1.44 1.90 34.85 0.36 North Proven 0.83 0.42 1.39 2.28 34.89 0.27 Probable 2.20 0.39 1.37 2.36 37.69 0.26 Prov + Prob 3.02 0.40 1.38 2.34 36.92 0.26 All Dams Proven 5.31 0.52 1.33 2.33 30.57 0.30 Probable 5.94 0.49 1.36 2.25 32.96 0.29 Prov + Prob 11.24 0.49 1.31 2.22 31.05 0.28

Notes:

1. CIM definitions were followed for mineral reserves. 2. Mineral reserves are estimated at a zero cut-off grade. 3. Mineral reserves estimated using bulk density of 1.7 t/m3 for TDS, 1.85 t/m3 for TDW, 1.6 t/m3 for

TDNU, and 1.35 t/m3 for TDNR. 4. Columns and rows may not add exactly due to rounding.



18 OTHER RELEVANT DATA AND INFORMATION Scott Wilson RPA is not aware of any other relevant data or information that should be

included in this Technical Report.



19 ADDITIONAL REQUIREMENTS MINING OPERATIONS The Woodlawn Retreatment Project will be an open cut hydraulic mining operation to

recover previously processed mineralized tailings, with ore processing by grinding and

flotation to recover three saleable concentrates - zinc, copper, and lead. The primary

goal is to regrind the material to a finer grind size to liberate the contained metals. Mine

production will be a nominal 4,300 tonnes per day of reclaimed tailings that is pumped to

the process plant. The Project is designed as a 1.5 million tonne per year operation with

a 7.5 year mine life.

MINE DESIGN Overall direction for mining the dams was based on relative net smelter metal values in

each area. The order was determined to be TDS, then TDW, then TDN. Also

supporting this order was the replacement of tailings from the processing plant being

better accommodated by the large storage volume available in TDS after the new tailings

pond is filled. TDS has capacity for tailings from both TDW and TDN. TDN is also a

logical choice for treatment last, given the lower values and the material in the top layer

of the dam having been retreated by Denehurst from 1991 to 1996. Figure 19-1 shows

the current tailings area.

A number of mine design factors were considered and applied where necessary to the

resource including dilution and extraction modifying factors. The overall volumes were

obtained from the topographic surfaces before tailings placement and the current

topographic surfaces. The surfaces used are shown in Figure 19-2.

The Feasibility Study is based on a hydraulic mining method using high pressure water

monitors as selected by Exoro Mining Services (Exoro). Hydraulic mining will progress

using a top-down approach with a channel feeding back to a sump. This herringbone

retreat method offers a number of operational advantages. The mining method is shown

in Figure 19-3.

TDN

TDS

TDW



Tailings Areas


Australia

Figure 19-1

19-2


LOWER SURFACE

UPPER SURFACE



Upper and Lower Surfaces forTailings Volume


Australia

Figure 19-2

19-3


Tailings flow

Worked outfloor Clean up 20-30m

behind active face

Active linebeing

monitored

Plan views

Plan view

Section view

45 degrees

1.0m

Not to scale

12 Operation

Starter channel and spindlepump placement

Spindle pump-collection point



Mining Method


Australia

Figure 19-3

19-4




The equipment has been chosen to hydraulic monitor using a “top-down” strategy. This

is seen as the most practical and safest monitoring strategy for the enclosed nature of

the dams. Full drainage of the tailings is unlikely to be achievable in the immediate time

frame and trafficability across the tailings will be difficult at times for heavier equipment.

Monitors will be equipped with hydraulic nozzle positioners to maintain optimum spray

patterns automatically without operator intervention. Water will be sprayed in a narrow

pattern using high pressure (20-25 bar) water. The water for the monitors will be

supplied from a multi-staged pumping array located at the recycle tank. Water will be

reticulated around a high pressure main installed on the dam walls and supplied to the

monitors through large diameter hoses. Standing water currently found on the surface of

the tailings is relatively acidic (pH~2) and equipment will require acid resistance

materials such as stainless steel to minimize wear.

To minimize operator exposure and maintain productivity, consistent feed rate, and

density, the monitors will be a combination of fixed and track-mounted units. Two

companies (Magnum Australia and Fraser Alexander) have provided pricing and

specifications for the monitoring equipment. An example of a track-mounted monitor

arrangement is shown in Figure 19-4.

FIGURE 19-4 TRACKED MONITOR (FRASER ALEXANDER)



MINE PLANNING The overall mine planning strategy was to mine all material accessible using hydraulic

mining in the order TDS, then TDW, then TDN. A cut-off grade parameter was not

determined for hydraulic mining and the assumption has been made that all material

accessible by the mining method will be mined and processed. This decision is also a

function of the low selectivity, low cost of the bulk mining method.

Mining will commence with a floating pontoon fitted with two 11 kW submersible pumps

to be installed in the southern end of TDS on the tailings surface to remove the standing

water volume estimated at 270,000 m3. A dual containment pipeline will be installed to

deliver the water to the evaporation dam. Standing water and drain-down water will be

transferred to the evaporation dam at a nominal rate of 100 m3/hr for a period of

approximately 22 weeks. After the tailings area is dewatered, an initial “slot” of tailings

will be removed using the monitor to establish the reclaim drainage channel and the

pumping station will be installed. From the sump a feed channel will be cut across each

mining cell and monitoring will develop the feed channel to the outside edges of the

tailings. The working face will be developed in a series of 20 m to 30 m echelon cuts

advancing toward the sump and the dam.

Monitoring will commence from a single track-mounted monitor working on top of the

tailings along the crest of the main drainage slot near the northwest corner of the TDS

where a working face will be developed. The slurry will then drain along the slot at a 1%

grade back to the reclaim sump for pumping to the thickener. The working face will then

be mined back to the sump. Monitoring operations will be on a 24-hour, 7-day per week

basis at a nominal rate of 190 tonnes per hour. Slurries developed by the monitors are

anticipated to be 55-60% solids.

Hydraulic mining of TDW involves removing the standing surface water volume

estimated at 45,000 m3 over a four week period and then developing two feed channels.

Mining is based on taking five metre high benches. Some cleanup will occur on each lift

as there will be an amount of natural land surface exposure on each successive lift

around edges away from the dam. The final lift will involve final floor cleanup to the base

of the dam.



Hydraulic mining of TDN involves five cells based on sections delineated by internal

walls constructed during placement of the original tailings. Current standing surface

water volume is estimated at 81,600 m3 and will require about seven weeks to remove.

The five cells will require developing five feed channels and sumps between the internal

walls. During original tailings placement, these internal walls were allowed to overtop

and then had roads re-established on them. The mining design involves leaving these

internal walls in place.

DILUTION AND LOSSES The review of the resource block model showed some blocks that would not be able to

be mined by the proposed hydraulic mining method. The block model was modified to

exclude these blocks. The resource block model was then adjusted to allow for dilution

and recovery. Mining recovery is based on an average expected loss of 20 cm of

tailings material in contact with other material. Additionally, a dilution value equivalent to

10 cm average vertical gain was added back to the product stream with no grade to

account for potential contamination from the original ground surface.

The application of dilution and loss was based on overall surface area for each

impoundment. TDS averages 3.3% overall ore loss and 1.6% overall dilution. TDN

averages 2.2% overall ore loss and 1.1% overall dilution. The same method of

calculation was undertaken for TDN, giving 2.9% overall ore loss and 1.5% overall

dilution. The block volumes and grades have been adjusted to reflect the estimated

recovery and dilution as per Table 19-1.

TABLE 19-1 ORE LOSS AND DILUTION FACTORS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Dam Area Tails Volume Loss Dilution

(m2) (x106 m3) (% at 200 mm) (% at 100 mm) TDS 440,798 2.70 3.3 1.6 TDW 231,853 2.12 2.2 1.1 TDN 301,073 2.10 2.9 1.5



MINE PRODUCTION SCHEDULE The mine production schedule was generated based on reserves within the upper and

lower surfaces using the following parameters:

• Target of a nominal 1.5 million tonnes of ore per annum, or 4,300 tonnes per day.

• Target higher grade material in the earlier phases.

The schedule includes 11.2 million tonnes of proven and probable mineral reserves.

The life of mine production is shown in Table 19-2

TABLE 19-2 LIFE OF MINE PRODUCTION Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Ore

Year kTonnes Zn (%) Pb (%) Cu (%) Au (g/t) Ag (g/t) 1 1,298.80 2.55 1.23 0.49 0.22 24.62 2 1,450.00 2.45 1.17 0.48 0.21 24.02 3 1,499.80 2.36 1.07 0.45 0.2 22.07 4 1,499.70 1.86 1.48 0.65 0.32 32.5 5 1,500.60 1.93 1.49 0.6 0.39 36.68 6 1,500.20 2.19 1.45 0.46 0.39 37.48 7 1,499.90 2.37 1.24 0.41 0.25 34.26 8 944.1 2.07 1.37 0.33 0.25 39.09

Total 11,243.10 2.22 1.31 0.49 0.28 31.08 MINE EQUIPMENT Two track-mounted hydraulic monitor guns are planned as the primary earthmoving

units. The track-mounted hydraulic monitors will be supported by smaller fixed hydraulic

monitors that will be used for floor cleanup. A small Caterpillar 950G type wheel loader /

tool carrier will provide concentrate loading and general site services. Table 19-3 lists

the major mine equipment. The planned mine work schedule is two 12-hour shifts per

day, 7 days per week.



TABLE 19-3 MAJOR EQUIPMENT LIST Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Equipment Quantity Description

Monitors 15-Gun-01 15-Gun-02

2 2 x 150 mm, 25 bar 1. Fixed static mount equipped with automatic nozzle control to allow variable monitoring patterns. 2. Track mounted to allow remote operation by the operator.

High Pressure Pumps 15–PMP-01 to 04

4

Base-plate mounted horizontal centrifugal pumps – operating in series; 400 m3/h per monitor at nominal 25 bar delivery head

Reclaim Pump 15-PMP-07/08

2 Vertical spindle, slurry pumps mounted on a floating pontoon

General Pumping 15-PMP-13/14 15-PMP-11

2 1

Dam Dewatering Pumps – 100 m3/h General service pumps

Wheel Loader/ Tool Carrier

1 Site Services (concentrate) loader will be used for occasional earthmoving duty. Cat 950G

Crane 1 Site services BHB crane will be used for piping, pumping stations and other equipment movements

Piping Various HDPE HP piping suitable for low pH applications (SS316), suitable to operate in periodic frost conditions

MINERAL PROCESSING Mineral processing is a conventional flotation milling circuit with primary grinding using

two Deswik 2000L vertical mill units to get a P80 of 30 μm. The flotation circuit will

consist of the sequential flotation of talc, copper, lead, and zinc concentrates. The

flotation conditions will be controlled by reagent addition to achieve good mineral

separation. Following flotation, the copper, lead, and zinc concentrates will be

separately thickened in high-rate thickeners, with the underflows being pumped to

separate agitated storage tanks. The three concentrates will then be batched through

three dedicated vertical plate and frame filters discharging into stockpiles (copper and

zinc) or a feed bin (lead). The concentrates will be loaded into lined standard 20 ft

shipping containers and trucked to Port Botany container terminal.

RECOVERABILITY Process recoveries are determined by metallurgical testwork. Each of the five primary

metals (Zn, Cu. Pb, Ag, Au) will have some recovery in each of the concentrates



produced. The process recoveries for the mine reserves and life of mine production plan

are based on the average recoveries shown in Table 19-4.

TABLE 19-4 AVERAGE PROCESS RECOVERIES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Zn (%) in Zn Conc 60.4% Zn (%) in Pb Conc 1.4% Zn (%) in Cu Conc 2.4% Total Zn Recovery 64.2% Cu (%) in Zn Conc 4.0% Cu (%) in Pb Conc 5.1% Cu (%) in Cu Conc 45.7% Total Cu Recovery 54.8% Pb (%) in Zn Conc 4.5% Pb (%) in Pb Conc 18.5% Pb (%) in Cu Conc 6.4% Total Pb Recovery 29.4% Ag (%) in Zn Conc 12.1% Ag (%) in Pb Conc 20.0% Ag (%) in Cu Conc 4.0% Total Ag Recovery 36.1% Au (%) in Zn Conc 10.0% Au (%) in Pb Conc 20.0% Au (%) in Cu Conc 5.0% Total Au Recovery 35.0%

Not all metal values in concentrate are payable. The base metals are payable in their

respective concentrate only. Combined zinc and lead greater than 5% in the copper

concentrate will be penalized. Precious metals are payable in all concentrates, but the

greatest value for silver and gold comes in the lead concentrate

MARKETS The base and precious metal markets are mature global markets with reputable smelters

and refiners located throughout the world.

Zinc, copper, and lead are principal metals traded on the London Metal Exchange (LME)

and have total price transparency. Prices are quoted on the LME for Zinc (99.995%



purity), Electrolytic Copper Cathode Grade A (99.99% purity), and Refined Pig Standard

Lead (99.97% purity) and can be found at www.lme.com.

The average zinc price for the first ten months of 2009 was $0.69 per pound. Current

prices as of November 23, 2009, are US$1.01 per pound. The three-year and five-year

rolling average prices through the end of October 2009 are $1.05 and $1.00 per pound,

respectively.

The average copper price for the first ten months of 2009 was $2.18 per pound. Current

prices as of November 23, 2009, are $3.10 per pound. The three-year and five-year


respectively.

The average lead price for the first ten months of 2009 was $0.73 per pound. Current

prices as of November 23, 2009, are $1.07 per pound. The three-year and five-year


respectively.

This technical report uses a metal price based on long-term projections from the major

banks. The prices used for the economic analysis are $0.80 per pound for zinc, $2.50

per pound for copper, and $0.60 for lead.

Silver and gold are principal metals traded at spot prices for immediate delivery. The

market for silver and gold trading typically spans 24 hours a day within multiple locations

around the world (such as New York, London, Zurich, Sydney, Tokyo, Hong Kong, and

Dubai). Daily prices are quoted on the New York spot market and can be found on

www.kitco.com.

The average New York spot gold price for the first ten months of 2009 was $941 per troy

ounce. The current New York price, as of November 23, 2009, is $1,164 per troy ounce.

The three-year and five-year rolling average prices through the end of October 2009 are

$819 and $695 per troy ounce, respectively.

The average New York spot silver price for the first ten months of 2009 was $14.04 per

troy ounce. The current New York price, as of November 23, 2009, is $18.58 per troy

http://www.lme.com/�

http://www.kitco.com/�



ounce. The three-year and five-year rolling average prices through the end of October

2009 are $14.10 and $12.04 per troy ounce, respectively.

This Technical Report uses the long-term price forecasts from the major banks, with a

long-term average price for gold of $975 per troy ounce and an average price for silver of

$13.00 per troy ounce for the economic analysis.

Operations at the Project are expected to produce a nominal 36 million pounds of

payable zinc, 7 million pounds of payable copper, 7 million pounds of payable lead,

360,000 ounces of payable silver, 3,200 ounces of payable gold, annually, over an

estimated mine life of 7.7 years.

CONTRACTS It is too early in the Project to secure concentrate contracts. Three firms have provided

indicative terms for the Woodlawn concentrates and these have been used to estimate

total payable metal.

The zinc concentrates are lower in zinc (46.9%) than typical (50%-60%) zinc producers

but are anticipated to be acceptable to the market. A treatment charge of $300 per dry

metric tonne (dmt) has been used. Other terms include:

• Zn payable: 85% of the Zn content (subject to a min deduction of 8.0 units) • Au payable: Deduct 1 g/dmt and pay 75% of the balance • Ag payable: Deduct 30 g/dmt and pay for 65% of the balance • Fe penalty: $2.00 per 1% >8% • Co penalty: $0.50 per 50 > 100 ppm

The copper concentrates are lower in copper (21.4%) than typical (25-28%) copper

producers but are anticipated to be marketable in the China and India market. A

treatment charge of $50/dmt and refining charge of $0.05/lb have been used. Other

terms include:

• Cu payable: 96.5% of the Cu content (subject to a min deduction of 1.0 unit) • Au payable: Deduct 1 g/dmt and pay 90% of the balance • Ag payable: Deduct 30 g/dmt and pay for 90% of the balance • Au refining: $4.50/oz • Ag refining: $0.40/oz • Penalty: Pb/Zn $2.00 per 1% greater than 5% combined.



The lead concentrates are much lower in lead (35%) than typical (50%-65%) lead

producers but could be good for the Chinese market. A treatment charge of $280/dmt

has been used. Other terms include:

• Pb payable: 95% of the Pb content (subject to a min deduction of 3.0 units) • Au payable: Deduct 1 g/dmt and pay 90% of the balance • Ag payable: Deduct 100 g/dmt and pay for 90% of the balance • Au refining: $5.00/oz • Ag refining: $0.80/oz

Given the quantities being produced, the copper and lead concentrates could be shipped

in 5,000 t lots two to three times per year and zinc could go in 10,000 t lots every two to

three months.

ENVIRONMENTAL CONSIDERATIONS An Environmental Assessment (EA) is being prepared by consultants Parsons

Brinckerhoff for submission to the NSW Department of Planning, in fulfillment of the

project development approval process. A preliminary EA was prepared in March 2008



items.

The closure and reclamation plan for the Project has been designed based on re-

establishing vegetation on the surface of the redisposed tailings. Total closure costs are

estimated to be $12.0 million prior to taking the salvage value of the assets into account.

A schematic drawing of the final tailings reclamation is illustrated in Figure 19-5.

Drain / sumpconstructed todewater tailings

Drain / sumpconstructed todewater tailings

ExistingLand

Surface

SEE DETAILBELOW

DamWall

Revegetation

Compost

DETAIL

Inert material

Inert material

CompactedInert material

200 mm

500 mm

100 mm

500 mm

as requiredfor stability

Compost

Biosolids or equivalent

T A I L I N G S

T A I L I N G S M A T E R I A L



Final Tailings Reclamation


Australia

Figure 19-5

19-14




TAXES Scott Wilson RPA has relied on Tri Origin for guidance on applicable taxes, royalties,

and other government levies or interests, applicable to revenue or income from the

Project. Australian Federal income taxes are 30%. A single ‘ad valorum’ royalty is

payable to the NSW state government at a rate of 4% of the total value of minerals

recovered or the ex-mine value calculated by deducting the direct costs incurred in

upgrading the minerals (after the first stockpile) and bringing it to market, from the gross

value of the minerals at the time of disposal. This is the only royalty that is payable by

Tri Origin.

CAPITAL AND OPERATING COST ESTIMATES OPERATING COSTS Exoro has developed a life of mine production plan (Table 19-2). Scott Wilson RPA

used the production and operating costs based on this life of mine plan. Average mining

cost per tonne over the life of mine is expected to be $1.56 for hydraulic mining.

These mining costs were used in conjunction with processing and general and

administrative (G & A) costs in the life of mine plan. Process operating costs are

expected to average $9.82 per ore tonne over the mine life, and G & A costs are

expected to average $1.31 per ore tonne.

Total Project operating costs are presented in Table 19-5.



TABLE 19-5 OPERATING COSTS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Cost Centre

$/ore tonne $/lb Zn

$/lb ZnEq

Mining 1.56 0.06 0.03 Processing 9.82 0.41 0.20 Administrative 1.31 0.05 0.03 Total Direct Costs 12.69 0.52 0.26 Smelting & Refining 12.49 0.51 0.25 Transportation & Freight 2.40 0.10 0.05 Reclamation 0.21 0.01 0.00 Total Indirect Costs 15.10 0.61 0.31 Royalty 0.46 0.02 0.01 Total Royalties 0.46 0.02 0.01 Total Operating Costs 28.25 1.15 0.58

CAPITAL COSTS Intermet and BE Enterprises have developed the capital costs for the proposed

Woodlawn process plant based on quotes for the major equipment and presented in

2009 US dollars. The plant design which forms the basis of the estimate has been

addressed in Section 16. The overall capital cost for the plant, including the tailings, is

estimated at US$60.2 million, plus $5.3 million in sustaining capital. The details are

shown in Table 19-6.



TABLE 19-6 OVERALL CAPITAL COSTS Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Area Initial

$ Sustaining

$ LOM Total

$ Concrete 2,333 0 2,333 Structural 1,539 0 1,539 Platework 1,269 0 1,269 Mechanical 19,449 0 19,449 Pipework 2,203 0 2,203 Electrical 7,608 0 7,608 Buildings 1.216 0 1,216 Earthworks 1,009 0 1,009 Tailings Dam 1,256 0 1,256 Site Costs 4,196 0 4,196 Land Acquisition 1,600 0 1,600 Contingency – Direct Costs 4,345 0 4,345 Design 6,308 0 6,308 Preproduction 1,681 0 1,681 First Fills 20 0 20 Consumable Stocks 814 0 814 Spares 1,732 0 1,732 Contingency – Indirect Costs 644 0 644 Sustaining Capital 0 5,320 5,320 Total Capital Expenditure 60,163 5,320 65,483

ECONOMIC ANALYSIS The economic project evaluation is based on estimated operating costs supplied to Scott

Wilson RPA. This project evaluation work includes an economic summary, discounted

cash flow analysis, as well as capital and operating cost estimates. The mine plan for

this analysis is based on Exoro’s mine planning work.

Based on the costs in the Feasibility Study and Addendum, Scott Wilson RPA created an

economic analysis. The economic analysis shows that at long-term metal prices of

$0.80/lb zinc, $2.50/lb copper, $0.60/lb lead, $975/oz gold, and $13/oz silver, the Project

has a pre-tax net present value (NPV) at a 5% discount rate of $29.0 million and an

after-tax NPV at a 5% discount rate of $17.2 million. Total pre-tax undiscounted cash

flow is $57.6 million and after-tax cash flow is $40.2 million.



A preliminary income statement and cash flow are presented as Table 19-7 and Table

19-8, respectively.

Over the mine life, the Internal Rate of Return is 12.0% after tax with a payback period of

4.8 years after tax.

The cash operating cost per pound of zinc produced is $0.35 after by-product credits.

When capital costs are added, total cash and non-cash costs (fully loaded) are $0.59 per

pound of zinc after by-product credits.

ECONOMIC CRITERIA REVENUE

• Nominal 1.5 million tonnes per year. • Metal price: US$0.80 per pound zinc, US$2.50 per pound copper, US$0.60 per

pound lead, US$975 per ounce gold and US$13.00 per ounce silver. • Net Smelter Return includes smelting, refining, transport, and insurance costs. • Revenue is recognized at the time of concentrate shipment. • Operating costs in AUD converted to USD at US$0.80 per A$1.00.

COSTS

• Mine life: 7.7 years. • Life of mine production plan as summarized in Table 19-2 of this report. • Mine life capital totals $65.5 million. • Average operating cost over the mine life is $28.25 per tonne ore processed.

November 2009 Feasibility Study$0.80 Zn $0.60 Pb $2.50 Cu $13.00 Ag $975.00 AuAnnual Income Summary (in US$ millions)

Year -2 Year -1 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 TOTAL

REVENUEZinc 0.0 0.0 29.3 32.5 31.3 24.6 25.6 29.0 31.4 17.3 0.0 0.0 220.9Copper 0.0 0.0 15.3 17.3 16.2 23.4 21.6 16.6 14.8 7.5 0.0 0.0 132.6Lead 0.0 0.0 3.6 3.9 3.6 5.0 5.0 4.9 4.2 2.9 0.0 0.0 33.0Gold 0.0 0.0 1.4 1.5 1.5 2.8 3.8 3.8 2.0 1.3 0.0 0.0 17.9Silver 0.0 0.0 3.1 3.5 3.2 5.0 5.8 6.0 5.4 4.0 0.0 0.0 36.1

Net Revenue 0.0 0.0 52.6 58.7 55.8 60.8 61.8 60.2 57.8 32.9 0.0 0.0 440.6

CASH COST OF SALESMining 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Process Plant 0.0 0.0 13.0 15.0 15.0 15.0 15.0 15.0 15.0 9.5 0.0 0.0 112.6General & Administrative 0.0 0.0 1.6 1.3 1.3 1.3 1.3 1.3 1.3 0.9 0.0 0.0 10.0Refining 0.0 0.0 17.9 19.8 19.0 17.0 17.4 18.8 19.4 11.1 0.0 0.0 140.4Refining 0.0 0.0 3.4 3.7 3.6 3.6 3.6 3.6 3.6 2.0 0.0 0.0 26.9Royalties 0.0 0.0 0.7 0.8 0.7 1.0 1.0 0.9 0.7 0.4 0.0 0.0 6.0Reclamation 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 2.4

Subtotal Cash Costs 0.0 0.0 36.5 40.6 39.5 37.8 38.2 39.5 40.0 23.8 0.0 2.4 298.3

NON-PRODUCTION COST OF SALESDepreciation 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 65.5Amortized Development Costs 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Amortization of Transaction fee 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Proceeds on Equipment Sales 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Write-down - Book Value @ Project End 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Subtotal Non-Production Costs 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 65.5

Net Income Before Tax (EBIT) 0.0 0.0 9.3 6.4 4.7 10.2 15.7 12.8 13.6 6.4 0.0 -2.4 76.8

Net Income After Tax 0.0 0.0 7.1 4.5 3.3 7.1 11.0 9.0 9.5 4.5 0.0 -2.4 53.6

TABLE 19-7 INCOME SUMMARYTri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

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Technical Report N

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November 2009 Feasibility Study$0.80 Zn $0.60 Pb $2.50 Cu $13.00 Ag $975.00 AuAnnual Cash Flow Summary (in US$ millions)

Year -3 Year -2 Year -1 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Year 11 TOTALSOURCESRevenue 0.0 0.0 0.0 52.6 58.7 55.8 60.8 61.8 60.2 57.8 32.9 0.0 0.0 0.0 440.6Costs (inc Tax & Int) 0.0 0.0 0.0 45.5 54.2 52.5 53.7 50.8 51.2 48.3 28.4 0.0 2.4 0.0 387.0Net Income - After Tax 0.0 0.0 0.0 7.1 4.5 3.3 7.1 11.0 9.0 9.5 4.5 0.0 -2.4 0.0 53.6

Depreciation & Amort 0.0 0.0 0.0 6.8 11.7 11.6 12.9 7.8 7.9 4.2 2.7 0.0 0.0 0.0 65.5From Eq Sale 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0FROM OPNS. 0.0 0.0 0.0 13.9 16.2 14.9 20.0 18.8 16.8 13.7 7.2 0.0 -2.4 0.0 119.1

From Banks 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0Repayment 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

FROM FINANCING 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

SOURCES 0.0 0.0 0.0 13.9 16.2 14.9 20.0 18.8 16.8 13.7 7.2 0.0 -2.4 0.0 119.1

USES:Capex 0.0 0.0 60.2 1.4 3.6 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 65.5Working Cap. 0.0 0.0 1.9 3.6 0.5 -0.3 0.8 0.1 -0.3 -0.4 -1.8 -4.2 -0.2 0.2 0.0

USES 0.0 0.0 62.1 4.9 4.1 -0.3 1.2 0.1 -0.3 -0.4 -1.8 -4.2 -0.2 0.2 65.5

NET C.F. 0.0 0.0 -62.1 9.0 12.1 15.2 18.8 18.7 17.1 14.0 8.9 4.2 -2.2 -0.2 53.6

CUMULATIVE C.F. 0.0 0.0 -62.1 -53.1 -41.0 -25.8 -7.0 11.7 28.9 42.9 51.8 56.0 53.8 53.6

TABLE 19-8 AFTER-TAX CASH FLOW SUMMARYTri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

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Technical Report N

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SENSITIVITY ANALYSIS Sensitivity analyses were performed for zinc price, copper price, lead price, silver price,

capital cost, operating cost, and exchange rate. The sensitivity analyses indicate that

Project economics are most heavily influenced by the operating costs, zinc price, copper

price, and capital costs. A 10% change in operating costs results in a ± $17 million

change in the after-tax NPV at a 5% discount rate. A 10% change in zinc price results in

a ± $11 million change in the after-tax NPV at a 5% discount rate. A 10% change in

copper price results in a ± $6 million change in the after-tax NPV at a 5% discount rate.

A 10% change in capital costs results in a ± $4 million change in the after-tax NPV at a

5% discount rate. The Project is least affected by changes in exchange rate, lead price,

and silver price. A 10% change in the exchange rate, lead price or silver price results in

a less than ± $2 million change in the after-tax NPV at a 5% discount rate.

Results of the price sensitivity analyses are shown in Figure 19-6 and Table 19-9.

Reserve estimates were based on prices of US$0.80 per pound zinc, US$2.50 per

pound copper, US$0.60 per pound lead, US$975 per ounce gold, and US$13.00 per

ounce silver. Results from the economic analysis at these prices are shown in Table

19-8. Since an after-tax total cash flow of $40.2 million is achieved, the economic

criteria for the reserve statement are met and the resources can be properly classified as

proven and probable mineral reserves.



FIGURE 19-6 SENSITIVITY ANALYSIS

TABLE 19-9 SENSITIVITY ANALYSES Tri Origin Minerals Ltd. – Woodlawn Tailings Retreatment Project

Parameter Variables Units -20% -10% Base +10% +20%

Zinc Price US$/lb 0.64 0.72 0.80 0.88 0.96 Copper Price US$/lb 2.00 2.25 2.50 2.75 3.00 Lead Price US$/lb 0.48 0.54 0.60 0.66 0.72 Silver Price US$/oz 10.40 11.70 13.00 14.30 15.60

Operating Cost $millions 254 286 318 349 381 Capital Cost $millions 52 59 65 72 79

Exchange Rate AUD/USD 0.64 0.72 0.80 0.88 0.96

NPV @ 5% Units -20% -10% Base +10% +20% Zinc Price $millions (4) 7 17 28 38

Copper Price $millions 5 11 17 23 30 Lead Price $millions 14 16 17 19 20 Silver Price $millions 14 16 17 19 20

Operating Cost $millions 48 33 17 2 (16) Capital Cost $millions 26 21 17 13 9

Exchange Rate $millions 22 20 17 15 12



20 INTERPRETATION AND CONCLUSIONS ADEQUACY OF PROCEDURES Scott Wilson RPA and various other firms and independent consultants have reviewed

the methods and procedures utilized by Tri Origin and Denehurst at the Project to gather

geological and assaying information and found them reasonable and meeting generally

accepted industry standards for a property.

ADEQUACY OF DATA Scott Wilson RPA believes that Tri Origin and Denehurst have conducted exploration

and development sampling and analysis programs using standard practices, providing

generally reasonable results. Scott Wilson RPA believes that the resulting data can

effectively be used in the subsequent estimation of resources and reserves.

ADEQUACY OF STUDY This Technical Report is based on the Feasibility Study prepared by Intermet for the

Project. Scott Wilson RPA believes that these data and the supporting documents were

prepared using standard industry practices and provide reasonable results and

conclusions.

COMPLIANCE WITH CANADIAN NI 43-101 STANDARDS Scott Wilson RPA believes that the current drill hole database is sufficient for generating

a resource model for use in resource and reserve estimation. Recovery and cost

estimates are based upon sufficient data and engineering to support a reserve

statement. Economic analysis using these estimates generates a positive cash flow,

which supports a reserve statement.

Measured and indicated resources for all areas, are 11.65 Mt of material grading 2.3%

zinc, 1.4% lead, 0.5% copper, 0.3 g/t gold, and 32.0 g/t silver. After applying modifying

factors and meeting the economic criteria, the entire mineral resource is converted to

proven and probable mineral reserves. The estimated proven and probable mineral

reserves for the Project total 11.2 Mt of material grading 2.2% zinc, 1.3% lead, 0.5%

copper, 0.3 g/t gold, and 31.1 g/t silver.



Scott Wilson RPA believes that the mineral resource and mineral reserve estimates have

been created utilizing acceptable methodologies. Scott Wilson RPA is also of the

opinion that the classification of measured and indicated resources, stated in Table 17-1,

and proven and probable reserves, stated in Table 17-8, meet the definitions as stated

by NI 43-101, Form 43-101F1, and Companion Policy 43-101CP dated December 23,

2005.



21 RECOMMENDATIONS Scott Wilson RPA presents the following recommendations. The cost of the

recommended work is $6.12 million as summarized in Table 21-1.

TABLE 21-1 RECOMMENDED WORK PROGRAM Tri Origin Minerals Ltd. - Woodlawn Tailings Retreatment Project

Item Cost

($ 000s)

Metallurgy

Optimize both grind and regrind design, using Deswik technology including studying existing Deswik installations to confirm operating performance parameters.

Continue study copper lead separation parameters including determining appropriate design criteria that will provide the flexibility for in-service optimization of copper lead separation.

Undertake further confirmatory work on potential to scalp off course non-sulphide gangue from tailings, i.e., define optimal size for removing oversize material, talcs and sheet silicates.

Review Feasibility Study and Addendum and undertake a comprehensive Gap Analysis to identify areas that have not been adequately studied and could result in a fatal flaw being designed into the process.

Subtotal 250

Mineral Resource Estimate Run mineral resource block model using unfolding feature 30

Use composite length approximately equal to sample length 10

Subtotal 40

Environmental Assessment

Complete plans to meet Director General's Requirements for Environmental Approval of the Project

Optimize and cost plans for rehabilitation of the Project Site

200

Permitting

Satisfy any Department of Planning conditions imposed as conditions for the transfer of SML 20 to Tri Origin

500



Item Cost

($ 000s)

Engineering Prepare mine plan consistent with the actual monitoring operating

procedure 30

Proceed with detailed design 5,000

Subtotal 5,030

Concentrate Marketing 100

Total 6,120



22 REFERENCES Cotton, R. R. (2008): Woodlawn Re-Treatment Project, JORC Compliant Resource

Estimate of Woodlawn Tailings, prepared for Tri Origin Minerals Ltd., by R. R. Cotton, December 2008.

Hobby, David (2009): Woodlawn Tailings Dam Drill Program (Draft), internal report to Tri

Origin, 2009. Intermet Engineering Pty. Ltd. (2008): Woodlawn Retreatment Project, Bankable

Feasibility Study, prepared for Tri Origin Minerals Ltd., by Intermet Engineering Pty. Ltd., June 2008.

Rankin, R. (2008): Woodlawn Re-Treatment Project (WRP) Mineral Resources,

prepared for Tri Origin Minerals Ltd., by GeoRes, May 29, 2008. Rankin, R. (2009): Woodlawn Exploration Project Technical Report (NI43-101),

prepared for Tri Origin Minerals Ltd., by GeoRes, October 9, 2009.



23 DATE AND SIGNATURE PAGE This report titled “Technical Report on the Woodlawn Tailings Retreatment Project, New

South Wales, Australia” prepared for Tri Origin Minerals Ltd. and dated December 15,

2009, was prepared and signed by the following authors:

(Signed & Sealed) Dated at Toronto, Ontario December 15, 2009 Richard J. Lambert, P.E. Principal Mining Consultant (Signed & Sealed) Dated at Toronto, Ontario December 15, 2009 Wayne W. Valliant, P.Geo. Principal Geologist (Signed & Sealed) Dated at Toronto, Ontario December 15, 2009 Holger Krutzelmann, P.Eng. Principal Metallurgist



24 CERTIFICATE OF QUALIFIED PERSON RICHARD J. LAMBERT I, Richard J. Lambert, P.E., as an author of this report entitled “Technical Report on the

Woodlawn Tailings Retreatment Project, New South Wales, Australia” prepared for Tri

Origin Minerals Ltd. and dated December 15, 2009, do hereby certify that:

1. I am Principal Mining Consultant with Scott Wilson Roscoe Postle Associates Inc. of Suite 501, 55 University Ave Toronto, ON, M5J 2H7.

2. I am a graduate of Mackay School of Mines, University of Nevada, Reno, with a

Bachelors of Science degree in Mining Engineering in 1980, and Boise State University, with a Masters of Business Administration degree in 1995.

3. I am a Registered Professional Engineer in the state of Wyoming (#4857), the

state of Idaho (#6069), and the state of Montana (#11475). I have been a member of the Society for Mining, Metallurgy, and Exploration (SME) since 1975, and a Registered Member (#1825610) since May 2006. I have worked as a mining engineer for a total of 29 years since my graduation. My relevant experience for the purpose of the Technical Report is: • Review and report as a consultant on numerous mining projects for due

diligence and regulatory requirements • Mine engineering, mine management, mine operations and mine financial

analyses, involving copper, gold, silver, nickel, cobalt, uranium, oil shale, phosphates, coal and base metals located in the United States, Canada, Zambia, Madagascar, Turkey, Bolivia, Chile, Brazil, Serbia, Australia, Russia and Venezuela.

4. I have read the definition of "qualified person" set out in National Instrument

43-101 (NI43-101) and certify that by reason of my education, affiliation with a professional association (as defined in NI43-101) and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of NI43-101.

5. I visited the Woodlawn Property on November 10, 2009.

6. I am responsible for the preparation of Sections 1 through 6, and Sections 18

through 23.

7. I am independent of the Issuer applying the test set out in Section 1.4 of National Instrument 43-101.

8. I have had no prior involvement with the property that is the subject of the

Technical Report.



9. I have read National Instrument 43-101, and the Technical Report has been prepared in compliance with National Instrument 43-101 and Form 43-101F1.

10. To the best of my knowledge, information, and belief, the Technical Report contains all scientific and technical information that is required to be disclosed to make the technical report not misleading.

Dated this 15th day of December 2009 (Signed & Sealed) Richard J. Lambert, P.E.



WAYNE W. VALLIANT I, Wayne W. Valliant, P.Geo., as an author of this report entitled “Technical Report

on the Woodlawn Tailings Retreatment Project, New South Wales, Australia” prepared

for Tri Origin Minerals Ltd. and dated December 15, 2009, do hereby certify that:

1. I am Principal Geologist with Scott Wilson Roscoe Postle Associates Inc. of Suite

501, 55 University Ave Toronto, ON, M5J 2H7.

2. I am a graduate of Carleton University, Ottawa, Ontario, Canada in 1973 with a Bachelor of Science degree in Geology.

3. I am registered as a Geologist in the Province of Ontario (Reg.# 1175). I have

worked as a geologist for a total of 36 years since my graduation. My relevant experience for the purpose of the Technical Report is:

• Review and report as a consultant on more than thirty mining operations and projects around the world for due diligence and resource/reserve estimation

• General Manager of Technical Services for corporation with operations and mine development projects in Canada and Latin America

• Superintendent of Technical Services at three mines in Canada and Mexico

• Chief Geologist at three Canadian mines

4. I have read the definition of "qualified person" set out in National Instrument 43-101 ("NI 43-101") and certify that by reason of my education, affiliation with a professional association (as defined in NI 43-101) and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of NI 43-101.

5. I visited the Woodlawn Project on November 10, 2009.

6. I am responsible Sections 7–15 and 17 of the Technical Report.

7. I am independent of the Issuer applying the test set out in Section 1.4 of NI 43-101.

8. I have had no prior involvement with the property that is the subject of the Technical Report.

9. I have read NI 43-101, and the Technical Report has been prepared in compliance with NI 43-101 and Form 43-101F1.




Dated this 15th day of December 2009

(Signed & Sealed)

Wayne W. Valliant, P. Geo.



HOLGER KRUTZELMANN I, Holger Krutzelmann, as an author of this report entitled “Technical Report on the

Woodlawn Tailings Retreatment Project, New South Wales, Australia” prepared for Tri

Origin Minerals Ltd. and dated December 15, 2009, do hereby certify that:

1. I am Principal Metallurgist with Scott Wilson Roscoe Postle Associates Inc. of Suite

501, 55 University Ave Toronto, ON, M5J 2H7. 2. I am a graduate of Queen’s University, Kingston, Ontario, Canada in 1978 with a

B.Sc. degree in Mining Engineering (Mineral Processing). 3. I am registered as a Professional Engineer with Professional Engineers Ontario

(Reg.# 90455304). I have worked as a metallurgist for a total of 30 years since my graduation. My relevant experience for the purpose of the Technical Report is:

• Reviews and reports as a metallurgical consultant on a number of mining operations and projects for due diligence and financial monitoring requirements

• Senior Metallurgist/Project Manager on numerous gold and base metal studies for a leading Canadian engineering company.

• Management and operational experience at several Canadian and U.S. milling operations treating various metals, including copper, zinc, gold and silver.

4. I have read the definition of "qualified person" set out in National Instrument 43-101

(NI 43-101) and certify that by reason of my education, affiliation with a professional association (as defined in NI 43-101) and past relevant work experience, I fulfill the requirements to be a "qualified person" for the purposes of NI 43-101.

5. I have not visited the Woodlawn Project. 6. I am responsible for preparation of Section 16 of the Technical Report. 7. I am independent of the Issuer applying the test set out in Section 1.4 of NI 43-101. 8. I have had no prior involvement with the property that is the subject of the Technical

Report. 9. I have read NI 43-101, and the Technical Report has been prepared in compliance

with NI 43-101 and Form 43-101F1.




Dated this 15h day of December 2009

(Signed & Sealed)

Holger Krutzelmann, P.Eng.

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