RPT ON MAG SUR ON PARTS OF THE MCCOOL TWP CL€¦ · L-7115A - SK I/A, S 1/2, Lot 7, Con II L-71155...

22
63.1183 M CCOOL Introduction Propwrty location and AoooRs5.hj.litr Topography Previoue W ork Lin* Cutting and Chaining Magnetometer Swv*y Otnoral Gaology Interpretation ConcluBions and H' 63.1123 MCCOOL 010C 010 1. ^ 2, : ! 2. 3 3 3, A 5. 6 6. 7 7. ft, 9 9, 10 -0*0-0- Dvtailad n O - O - O Map Shtdt* 3^ 4* 5* 6| 7, ?, 13 anil H - GmonAp*tio Contour Finns on a ficalw of l n * ?!00', Property Plan of MnCool Townohlp - on a deal* of l" * 1000", -0-0*0-

Transcript of RPT ON MAG SUR ON PARTS OF THE MCCOOL TWP CL€¦ · L-7115A - SK I/A, S 1/2, Lot 7, Con II L-71155...

Page 1: RPT ON MAG SUR ON PARTS OF THE MCCOOL TWP CL€¦ · L-7115A - SK I/A, S 1/2, Lot 7, Con II L-71155 - SW 3/A, S 1/2, Lot 6, Con II L-71156 - KB I/A, 3 1/2, Lot 7, Con II ... plans

63.1183 MCCOOL

Introduction

Propwrty

location and AoooRs5.hj.litr

Topography

Previoue Work

Lin* Cutting and Chaining

Magnetometer Swv*y

Otnoral Gaology

Interpretation

ConcluBions and H'

63.1123 MCCOOL 010C

010

1. ^

2, : !

2. 3

3

3, A

5. 6

6. 7

7. ft, 9

9, 10

-0*0-0-

Dvtailad

n O - O - O

Map Shtdt* 3^ 4* 5* 6| 7, ?, 13 anil H - GmonAp*tio Contour Finns on a

ficalw of ln * ?!00',

Property Plan of MnCool Townohlp - on a deal* of l" * 1000",

-0-0*0-

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42Ae9SEe06G 63.1)23 MCCOOL 010

•'xBS.1123 MCCOOL

Introduction,

Property

Location one! AoooBft.lhilitv

Topography

Previous Work

Lin* Cutting and Chaining

Magnetometer Survey

General Geology

Interpretation

Conclusions and rv*oornnt*rKlalioris

010Cl, 2

3

3,

5.

6. 7

7. S, 9

9, 3.0

- O - O - O -

Detailed Rnport

M o - o - o

Maps Aceompanying H

Map Shests 3, 4, 5, 6, 7, ?f 13 and H - Oftoman;iiat.io Contotu- Plnnp on a

nealw of lw * ^00'.

Property Plan of MnCool Townohlp - on a seal* of ln * 1000",

Legencl Sheet*

-0*0*0-

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\ 'V A RKPORT OH M4GNETOMBTBR SURVEY ON PARTS OP THE MoCOOL V V TOWNSHIP CLAIMS, LARDER LAKE MINING DIVISION, PROVINCE

OF ONTARIO, - ^- ..

Introduction1 !

The following report describes the magnetometer survey recently completed

on Canadian Johns-Manville Company Limited claims located in MoCool Township,

Lard w Lake Mining Division, Province of Ontario.

Cutting and chaining of picket lints wan contracted to Jean Jdix Company

Limited of Val d 'Or, Quebec. Picket lints spaced at 200 foot intervals were

out at right anglvs to bas* lines which closely paralleled the strike of the

ultrabasic sill. Pickets were fixed every 50 feet along the offset lines by

chainage,

Magnetometer surveying was conducted by R. Kaltuasser, Senior Field man

and geophysical operator with this Company, and was assisted by R. Haley and

later by R. Stewart. Readings were recorded at 25 or 50 foot intervals along

the offset lines using a Sharpe 's A- 2 type instrument. The results of this work

ar* shown on the accompanying Ceo-Mangetio Contour Plans on a scale of one inch

equals 200 feet*

Supervision and interpretation of this work was the responsibility of th*

writer. Senior Geologist with Canadian Johns-Manville Company Limited,

Property i

The claims surveyed are located in Concessions 2 and 3 and extend from the

west half of Lot 6 to the western boundary of Lot 11 in MoCool Township, Larder '* Lake Mining Division, Province of Ontario.

Canadian Johns-Manvllle holdings in this Township total 30 claims in onei

block, of which the surveyed portions comprise 16 claims in three separate

sections of the main claims group* See accompanying Property Plan on a scale

of one inch equals 1,000 feet for details*

Claims surveyed are numbered and further identified as follows t *

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X' - " . 2 -v ; - -A^ ^look I - L-71168 - NW I/A, S 1/2, Lot 10, Con. Ill

L-71169 - SW I/A, S 3/2, Lot 10, Con. IllL-71170 - HE I/A, S 1/2, Lot II, Con. Ill

- L-71171 - SE I/A, N 1/2, Lot II, Con. IllL-71172 . SW I/A, K 1/2, Lot II, Con. Ill

; . L-71173 - HW I/A, S 1/2, Lot II, Con. IllBlock I ie comprised of six olaima totalling approximately 2AO aorta.

Block II - L-71153 - SW I/A, S 1/2, Lot 7, Con IIL-7115A - SK I/A, S 1/2, Lot 7, Con IIL-71155 - SW 3/A, S 1/2, Lot 6, Con IIL-71156 - KB I/A, 3 1/2, Lot 7, Con IIL-91157 - NW I/A, S 1/2, Lot 7, Con IIL-72956 - NE I/A, S 1/2, Lot 8, Con II

Block II ie comprised of eix claims totalling approximately 2AO nores,

Blook III - L-71160 - NE I/A, N l/2* Lo* 7, Con IIL-?1162 - SE I/A, S 1/2, Lot 7, Con IIIL-71163 - SW I/A, S 3/2, Lot 7, Con IIIL-7116A - NW I/A, S 1/2, Lot 7, Con III

Blook III is comprised of four claims totalling approximately 160 acres.

Sixteen claim*, having a total approximate acreage of 6AO, vere sunrey-

ed during the couree of this work.

Location^and Aecesgibilityi

The Canadian Johns-Manville claims are located in the south half of

MoCool Township, cantral and western sections, Larder Lake Mining Division,\

Province of Ontario. \

Ready access by oar or truck is provided by sand roads extending north-

ward from Highway #101, at a distance of approximately seventeen miles east

of the town of Matheson. The locations of these sand roads are chown on the

accompanying Property Plan on a scale of one inch equals 1000 feet*

Topographyt

Qlaoiofluvial deposits cover the McCool Township claims. This area f

of sand, gravel and boulders is drained by Monahan and MoCool creeks which

flow to the north and east to Abitibi Lake, Monahan and Camrose Lakes arel

located in the southern portion of the group, while Munro Lake and a small

undrained pothole are situated along the western boundary of the olaima.

A large area of outcrop, gabbro, sepptntinleed peridotite and dunite,

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ooours in the eouthaastarn portions of tha olaime group and forma MoCool Hill

vhioh projaots vail abova the surrounding araas of sand*

Tha claims ara sparsely timbered vith Jackpine, poplar, birch, ohtrry

and alders. Several areas of open sand dunes and eskers occur in the western

portion of tha group.

Previous Worki

MoCool Township was mapped in detail by J. Satterly during 1951* A

report and a geological plan on a scale of one inch equal! 1000 feet were pub

lished in the Sixty-First Annual Report of the Ontario Department of Mines (Vol.

LXI, Part 5, 1952),

Geological napping was also carried out in the araa by C. W, Knight,

A. G* Burrows, P, 5. Hopkins and A* L. Parsons and a report entitled "Abitibi -

Night - Hawk Gold Area" was published in 1919 by the Ontario Department of Mines.

from 19X9 td 1952 there was considerable exploration activity in the

Township and geophysical surveys and diamond drilling ware oonduotad over tha

ultrabasic rocks discussed in this report by Camrose Gold and Metals Limited and

by Canadian Johns-Manville Company Limited. AB the results of this initial vork

disclosed only minor amountG of ehort chrysotile asbestos fibra tn* claims vara '

allowed to lapse*

This Company has been acquiring claims over the McCool syncline of liaoio

and ultrabasic rocks since 1959 and holdings now total thirty claims which are

being explored in considerable detail for economic chrysotile fibra mineraliza

tion.

Line Cutting and Chaining t

Starting of base lines, cutting and chaining of same and turning off

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picket lines was carriod out by Canadian Johns* Kanville personnel* Note

that a transit was utilised during the oouree of this work to increase theM

accuracy of the grid. This phase of the program van conducted by Ri Kaltwasser

with the assistance of R. Haley and W. Scott Intermittently during the period

March 10th to April April 13th, 1961.

On Block Ho. l - the base line was turned off from a road Junction in

the north central section of claim L- 71170 and extended 2800 feet southeast

of the 00 point and 2200 northwest of came. Ths bearing of the base line was

established at N520W. Offset lines, spaced at 200 foot intervals were cut at

right angles to the base line, on either side of same and were extended to

the claim boundaries. Pickets with numbered locations were fixed every 50

feet along these offset linos by ohainage.

On Block No. 2 - the base line was started from the steel pin at the'L l'

No. l Post of claim L-Y115/V and was cut to thn east for a length of 1200

feet and to the west for a length of 3800 font, A second base line was cut

to the riorth from the name 00 point for a length of 1200 feet. Offset picket

lines, spaced at 200 foot Intervals, were cut at right angles to these base

lines and were extended to the claim boundaries wherever possible. Note that

on claim L- 71156 it was impossible to extend the lines on to MoCool Mountain*

On Block No. 3 - the base line was turned off from the steel pin

at the Ho. l post of claim L- 71159 and was cut to the northwest for a length

of 4600 feet. The bearing of this base line was established at N35OW* Offset

lines spaced at 200 foot intervals were cut at right angles to the

base line snd were extended to the claim boundaries.

Cutting of offset picket lines and chaining of a majority of same

were contracted to Jeart Allx Company Limited of Val d*0r, Quebec. This work

was carried out during the period March 15th to April lith, 1961.

A total of 29.6 miles of picket lines and base lines was cut and

chained during the course of this program,

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. 5 *

Magnetometer Surveyi

A magnetometer survey was conducted over Blocks l, 2 and 3 of the McCool

Township claims by R. Kaltwasser with the acEinternee of R* Haley and later R.

Stewart. This work was carried out during the period March 2Ath to June 10th,

1961,

Magnetic readings were recorded using a Sharpe*s A-2 type instrument

(C. J, M. No. 166) having a sensitivity or coale constant of 20.00 gammas per

scale division* Calibration of this instrument nnd the auxiliary magnets was

completed prior to commencing this survey.

On Block No. l - a Base Control Station was established 11+25 feet south

of the base line on picket line 4+00 East. The value of this base station was

fixed at 730 gammas by correction to Munro Mine Base Station* No* 2 (Munro -

Beatty Sill). Consequently, with this correction, a gamma value of 1220 corres

ponds to an absolute value of 57,599*15 gammas as established at the Government

Magnetic Base Station located at Matheson.

A Base Control Station was established on Block No. 2 at 5+00 feet south

\ of the base line on picket line 2^400 West. The value of this station was fixed

at 1260 gammas after being corrected to the Base Station en Block No. 1.

,. On Block No. 3 - a Base Control Station was established at 7+00 feet

v'est of the Base Line on picket line 32+00 North. The value of this station was

fixftd at 2282 gammas after being corrected to the Bane Stations on Blocks l and 2,

During the course of the surveys the base control station was observed

at regular intervals (four readings per day) as a check on the working condition

of the instrument and to record the daily diurnal variation.Stations were spaced

at 25 or 50 foot Intervale along the picket lines depending upon the magnetic

intensity of the underlying formations.

;- A total of A,291 stations was^recorded en the three blookn of the

MoCool Township claims during the course of the magnetometer survey.

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The results of tha magnetometer survey are depicted on tht accompanying4J

plans on a seal* of one ir oh equals 200 feet* Contour lines of equal magnetic in

tensity have been drawn at 500 gamma intervals from O to 6000 gammas. The interval

has been changed to 1000 gammas for readings exceeding 6000 gammas in value.

general

The geology of the area, McCool Townnhip, vas mapped in detail by J.

Satterly and assistants and the results are shown on Map No. 1952-2 which accom

panies the geological report on this Township, issued by the Ontario Department of

Mines. In order to show the general geology of the region discussed in this

report i the following "Table of Formations" has been included and was taken direct

ly from the Sixty-First Annual Report of the Ontario Department of Mines being

Vol. LXI, Part 5, 1952, entitled "Geology of McCool Township" and compiled by

Satterly.

Table of Formations

CENOI20IC

Recantf Pleistocenei

PRECAMBRIAN

Mataohowant

Algomani

Fra-Algomant

Windblown sand (dunes), fltream r deposits, peatSand, gravel, boulders; clay; windblown sand (dunos)

Great Unconformity

Quarts diabase, diabase

Intrusive Contact Albite granite, fledspar porphyry, lamprophyre

Intrusive ContactDiorite, diabase, quartz diabase, gabbro, quartz gabbro, anorthositio gabbro, gabbro pagmatitej pyrixeuitej serpentinized peridotite and dunite.

Intrusive ContactAcidic volcanic!* and pyroclastics i rhyolite j rhyolite

Keewatini agglomerate and tuffBaeic and intermediate volcanics t and wit t, basalt] pillow lava, diabasic lava, spherulitic lava, fragmental lava (flow breccia)

McCool Township lo underlain by baoic to intermediate lavas with minor

occurrences of acidic lavas and tuffs. Thane lavas are cut by (1) a group of

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to ultrabasic intrusivee ranging fron gabbro to highly serpentlnized d unit*,

(2) a Barnes of narrow dIk*B of porphyry and lamprophyre and (3) north-south trend

lag diabase dikes.

Details of the geolopy of the MoCool Township claims is discussed under

the heading "Interpretation".

Interpretations.

The interpretation has benn based upon a study of the geomagnetic plane,

previous work in the urea (diamond drillir-f,, geophysical and geological surveys

on adjoining clniwe), regional r.*cloty *nd aerial photographs.

OD Blook #1 (see accompanying Property Flan for location) - Map Sheets 5

and 6 - raagnetlo results indicate the occurrence of a slr.eable till-like body of

ultrabaeio rookc striking in a northwesterly direction across the claims group.

This block is located in th* central section of the south limb of the HcCool

Syncline which extends from MoCool Hill northwestwards into Munro and Warden

Townships,

The ultrabaeio r,ono - nainly highly rerpentinized dunit* - varies in

thickness froa 800 to 1300 feat. Magnetic readings over this intrusive range in

intensity from 4,000 to 26,000 ganjnas indicating zones of extremely magnetite-ricrt

dunite within the ultrabasic. Magnetic readings over the gabbro and poscibly

pyroxenite, located along tho north contact of the ultrabasic, range in intensity

from 700 to 6,000 p.amas with a majority of readings exceeding 1000 gammas in

value* The volcanics, to the eouth, range in intensity from 4*000 to 500 gammas

with a majority of the readings below 1500 gammas in value e

Along this portion of the syncline the ultrabasic is relatively uniform

and on the basis of magnetic and regional dtta appears to dip near vertically to

steeply northeast. One major cross structure ocoure in the western portion of

the block, striking slightly north of east. On the basis of the magnetic data

and diamond drilling (Holes Me #6 and 11) thin structure offsets the pyroxenite

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horison which forms a narrow sill-like eon* in the central portion of the serp ent ini zed dunite and peridotite intrusive* Three ainor cross structures are shown

M -

offsetting the south contact of the ultrabasic in the eastern portion of th* block These four fault zones strike in a northeasterly direction but cannot be traced across th* ultrabasic.

On Block #2 (see accompanyinp Property Plan for location) f Map Sheets

3, U t 7 and 8 * the ultrabaoic maintains a fairly constant thickness of 1200 feet along the south limb of the syncline and approaching the nose of saw* on Patented claim L~5500l* Magnetic readings ovar tho eerpwntinized peridotite - dunite intrusive ranpe In value from 2500 gammas along the south contact to over 20,000 gammas along the north contect. On the basis of the magnetic readings, surface geological mapping and diamond drilling by C&nrose Mstals Limited, the north contact has a near vertical attitude while the south contact dips moderately to the south, It is proposed to test this south clip by diamond drilling on claim L-71154 within the next few weeks.

Magnetic readings over the volcanics to the south rang* in intensity froa 2500 to 300 gammas, with readings over the pyroxenite and gabbro to the north ranging in value from 7000 to 200 gammas. Again, a high majority of th* readings exceed 1000 gamiaas in value in the latter instance*

Two and possibly three narrow sill-like horieons of pyroxenite occur within the tialn serpentinized peridotite - dunite intrusive as indicated by the drilling results of Cswrose Metals Limited. These zones are weakly indicated magnetically as shown on the accompanying plans.

Only minor cross faulting is indicated on Block jf2, with the faults stri king in a north - south direction and offsetting either, but not both, the north or south contacts. From this it would appear that a major longitudal fault or shear cone ooours within the central portion of the ultrabasic Intrusive.

On Block #3 (see accompanying Property Plan for location) * Map Sheets 7, 8, 13 and 14 - magnetic results indicate the occurrence of a sizeable

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-9-' ; ' '

trabasic intrusive striking In a northwesterly direction across the claims.

Thia block, la located Immediately to the northwest of the nose of the fold, along

the north limb of the syncline. This portion of the syncline appears to be over

turned with dips being steeply to the northeast and is sharply depicted by mag

netic data and diamond drilling In the fault block between picket lines 20JOO

Korth and 32400 North.

The serpentlnieed peridotite - dunite horizon varies In thickness from

400 to 650 feet and magnetic readings range in intensity fron 6000 to 21,000

ganaiae. The eons of extrnrw raifinstio "hifhis" in the major fault block has been

tested by diamond drilling (Holes Me #12 and 13A) and was found to be highly

serpentinized, nagnetite-rich dunite, containing a fair percentage of hair and

thread chrysotile fibre mineralization.

Magnetic readings over the pyroxenite - gabbro along the southwest con

tact of the peridotite - diuiits vary In intensity from 8000 to 1200 gammas with

readings over the gabbro and/or volcanics to the northeast ranging from 5000 to

300 gammas.

Three najor cross structures, striking sliphtly north of east, offset

the peridotite - dunite Intrusive nnd are jihwply depicted both magnetically and

topographically. Cthor minor crors structures offset the southeast contact of

the ultrabasic In the southeastern portion of the block.

A north - oonth trending diabase dike h*.n been intersected In diamond

drill hole Mo #3 but Is not indicated by th* ni9.rnnt.lo renultn.

Conclusions and Reoomnwndationsi

The detailed magnetic ourvoy of the McCool Township claims combined with

geological napping and diamond drilling during the early 1950's indicate a size

able folded and faulted Intrusion of ultrabaoio rocks forming portions of the

MoCool Syncline. Previous drilling by Camrose Mitals Limited and Canadian Johns-

Kanville Company Limited indicated the occurrence of minor short chrysotile fibre

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- 10 *

within the highly serpentindeed dunlt* herieon of this folded sill,

More reomt drilling by Canadian Johnfc-Manvill* Company Limited * hole* Mo #11,

12, and 13A - hae alco Interpectod fliwilar iiineraliuation. It le t h w* f or*

proposed to reaume drilling on Block #2 to tent th* short fibre noounttrod in

Oawrose program and to probo the south contact ef the ultralMBie son*.

P. J* Kvelegh, July 12th, 1961. 8r. Geologist.

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^••".••••••:Ns;. V . t. " "yy ' ^v''.,, 4ti jv - -"-

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TOWNSHIP MICHAUD

Map No. 1952-2

TOWNSHIP OF MCCOOLJOUTH H*UF

DISTRICT O F COCHRANE. ONTARIO

Scale i 2.U.or l Inch to 1,000 Feet

.lOHNS-MANVU-Lr CD LTD HUNRQ M IHE OHTAHIG

LOCATION OF MINING PROPERTIES IN -HcCOOL TOWNSHIP,r-!) IP

42A09SE0068 63.1123 MCCOOL

S, di., l I

SYMBOLS

. H igher tj'ound.

' A ltitude in [eft above mean sea level.

CQ or *,narrip, and boundary.

l Dam \ Beavei da:"

IUI , H ighway, frith number. 1

Motor road.

^- - - - - -r tVagofi i-oatf, tractor road.

.\ Trail.

Glacial striae.

Kettle.

Sand dune.

* j Small roc* outcrop.

Boundary ot itxk outcrop, outcrop area.

Geological boundary, defined.

Geological boundary, assumed.

Geological boundary, as indicated by geophysical data.

j Strike and dip; direction ol.top unknown.

Strike and vertical dip; direction of fop unknown.

l .-i— n Strike and dtp; top m direction of arrow.

Strike and vertical dip; top in direction o!L.

i X, l D irection in which lava flows face.

f " ———j Direction (arrow) in which overturnedl 47S. j b*** 5 ' Ke indicated by gradation ini_... J__l grain sue.

j j. j Direction m which lava - //cn*s Cac*. l_ ^ - J indicated by shape of pillows.

Synclinal axis.

Anticlinal axis.

r

l S(nAe antf dip of schistosity.

Strike of vertical schistosity.

Fault, defined.

Fault, assum&t.

-j Picket line.

Building.

o PH l Test pit.

Trench.

Dull hole, vertical.

Drill hole, geology protected vertically to horizontal plane.

' l Drill hole, geology protected up dip of formations to horizontal plane.

l ov m ' i Depth of overburden in feet.L , _ .j

Quartz veins, width in inches.

Sulphide mineralization.

LEGEND

: 6 j Quart? diabatf, diabase.

INTRUSIVE CONTACTALGOMAN . . j'

Attitte granite (Sa); feldspar (Se); lamprophyre (St).

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