EM & MAG SUR HORNE 2-70€¦ · Title: EM & MAG SUR HORNE 2-70 Author: NORANDA EXPL CO LTD Subject:...
Transcript of EM & MAG SUR HORNE 2-70€¦ · Title: EM & MAG SUR HORNE 2-70 Author: NORANDA EXPL CO LTD Subject:...
ELECTROMAGNETIC AND sw^sz s.ea, HOR* 010
HORNE 2-70m i iniiBiiioiiivHiii
LOCATION
Noranda Exploration Co. Ltd., staked fourteen claims
TB 277354 to TB 277367 in Horne Township, the Thunder Bay
Mining Division. The Weigand River passes through the north
west claims.
ACCESSIBILITY
The claim group can be easily reached by truck. About
26 miles west of Thunder Bay on the 11A 17A Highway, the Glen-
water Road cuts off to the south and along this road the pro
perty can be located. The claim group is about 6 miles from
the Highway turn off.
LINECUTTING
The baseline was cut on an azimuth of 135 in accordance
with what the general strike is considered to be.
Parallel lines were cut perpendicular to this at spacings
of 400 feet. All the lines are picketed every 100 feet.
There is a total of BJJLjriiJLe-^,oJL--LJ-ii-e- C-U-L-
GENERAL GEOLOGY
The main rock types are extrusives in the form of tuffs,
rhyolites, andesites, breccias and agglomerates. Iron formation
is also present in two lineations striking generally N.60 0 W.
Along the south boundary there are rhyolites with some
local shearing. To the north near the #2 baseline the rhyolite
blends into an acidic tuff which has local brecciation. To the
east the rhyolites predominate, but they become more ferrugenous.
North of the second baseline there are large low outcrops
of tuffaceous agglomerates and rhyolite,
ELECTROMAGNETIC SURVEY
PURPOSE
To determine whether there is any sulphide mineralization.
COMPANY CONDUCTING THE SURVEY
Geophysical operators employed by Noranda Exploration Co.,
Ltd., did the survey under supervision of Peter G. Cooper,
Geophysicist, who planned and is responsible for the survey,
INSTRUMENT & SENSITIVITY
The Electromagnetic survey was carried out using the
* This unit is manufactured
by Crone Geophysic's Ltd., for Noranda Exploration Co. Ltd.,
under Patent No. 63156.
Survey data is obtained by a two man crew. Each man is
equipped with a coil capable of receiving and transmitting, an
amplifier, earphones, and a power supply of three 6 volt bat
teries. The crew uses the "in line shootback" method of sur
veying. One man transmits while the other man receives, and
then they reverse the procedure at the same station. The trans
mitter has an output of 5 watts, and it operates at frequencies
of 1800 Hz and 480 Hz.
The magnetic field caused by an alternating current in
the transmitting coil induces an alternating current into any
conductive medium within the range of the magnetic field. The
conductive medium emits its own magnetic field (secondary mag
netic field), and the combination of these two fields produces
a resultant magnetic field. When the plane of the receiving
coil is positioned in the direction of the resultant field,
there is a minimal amount of current induced into the coil,
and an audial null is noticeable in the earphones. A dip angle
is read from a clinometer when the receiving coil is in this
position. After the two men have reversed this procedure and
they each have taken a reading at the same station, the readings
are added together to obtain a resultant dip angle. When the
readings cancel each other out and the resultant dip angle is
zero, then there is not any subsurface conductivity. But when
the resultant dip angle is ;f3 or greater then an anomaly exists
and detailed readings are taken. This shootback method helps
to eliminate effects due to topographical relief and coil mis-
orientations. The readings are plotted always at the "chief's
position" which is either to the north or east of the helper
depending on the direction of the lines.
RESULTS ^ DISCUSSION
The claim group was staked to include nine airborne con
ductors. It is quite possible that we do not have all of these
conductors particularly the six channel anomalies recorded in
the western portion of the claim group.
The J.E.M. survey recorded an anomaly on all but one line
on this property. Unfortunately the western half of the pro
perty is covered with a thick layer of conductive overburden
which is disguising if not completely masking the effects of
a true conductor. The poor frequency ratios and the noisey
nulls are inductive of the terrain found on this portion of the
property. From line 20SE to line 36SE the anomalous readings
are due to conductive overburden and to small streams. This is
also true of the three channel airborne anomalies recorded in
this area. From 12SE to the west and north the overburden is
masking some very strong airborne anomalies. Several vertical
loop set ups were made; however nothing was found. Some of
these anomalies may be off the property to the west. We will
do a Radem search for these anomalies and then check our find
ings with the vertical loop.
From line 40Se there are several conductive axial trends
and isolated conductors but only two of these have any interest,
On line 40SE at 14 4- DON we pick up a stream which runs north
west to south east. This same stream gave a J.E.M. indication
on line 44SE at 17 + 3 5N. The stream then turns and runs para
llel to the 19 + DON tie line and continues off the property.
A conductor of interest starts on line 40SE at 25 -*- OON.
and runs parallel to strike over to line 60SE. Due to several
reasons the J.E.M. does not have distinct crossovers and the
axial trend does not appear continuous over the complete length
such as on 52SE and 56SE; however the Radem carries the con
ductor off the east end of the property. This conductor para
llels the high magnetic anomaly, but just to the north. The
second conductor of interest is on the top end of line 56SE.
Both the J.E.M. and Radem picked this anomaly up and it may
very well extend to the east off the property. The rock here
is a chert, but there is not any indication of a conductor.
MAGNETIC SURVEY
The magnetometer survey was conducted at the same time
as the E.M. with equally qualified personnel using a
Fluxgate M
The same grid was used with readings everyllOO feet, this
being reduced to 50 foot readings over anomalous areas.
The idea of the survey was to give additional information
to the E.M. survey.
RESULTS 6-jnSCUSSIQN
The airborne survey indicated two magnetic areas on the
claim group, and this is what the ground survey found. The
first anomaly is on the bottom aid of lines 32SE, 36Se and 40SE.
This area is well covered with overburden and we have no idea
what is the cause of this anomaly.
The second magnetic anomaly is in a linear belt of sedi
ments stretching from line 28SE around 21 * OON. over to line
60Se. There is a strong concentration of iron in many places
in this belt.
CONCLUSION
There are a few additional checks to be made on this pro
perty and in particular the locating of the six channel anom
alies on the west end. Many of the other anomalies on this
property are not of significant interest to do more work on
them * Submitted by,
.A.Peter G. Cooper, Geophysici st.
Type of Survey
Township or Area.
jhief Line Cutter, or Contractor
ASSESSMENT WORK DETAILS
MAGNETIC
HORNEA separate form is required for each type ol
52AieSW88)62 2.634 HORNE
A. GAMBLEName
Walsh Rd. ( Thunder Bay, OntarioAddress
Party Chief. RAY WILLETTName
253 Lincoln St.. Thunder Bay. Ont.Address
i:---
Consultant PETER G, COOPERName
253 Lincoln St,, Thunder Bay. Ont.'Address
Geological field mapping by R* TURNERName
253 Lincoln St., Thunder Bayj Ontario.
COVERING DATES
y ne fating AUG.15 to 24. 1970________________.
Field OCT. 1-7. 1970_____________________Instrument work, geological mapping, sampling etc.
nffirp OCT. 10-20, 1970-————————-^—,^——
INSTRUMENT DATA
Make, Model and Tyr McPHAR FLUXGATE MAGNETOMETER ^ M -700
Scale Constant or Sensitivity____________________' ' '" Or provide copy of instrument data from Manufacturer's brochure.
Radiometric Background Count ———^—^-,
Number of Stations Within Claim Group
Number of Readings Within Claim Group
Number of Miles of Line cut Within Claim Group
Number of Samples Collected Within Claim Group
489
489
8/5
tfe
CREDITS REQUESTED
Geological Survey
Geophysical Survey
Survey
20 DAYS per claim
D
D
40 DAYS per claim
D
D
D
' - Includes (Line cutting)
Show Cheeky
SIGNED. r
300MINING CLAIMS i KA VfcKSfcU
i- List numerically -
TB 277354
TB 277355
TB 277356
TB 277357
TB 27Z358
TB
TB^27t36b
TB 27T361
TB 277362 " '
TB Ul. '4:
TB 277364
TB 277365
TB 277366
TB 27736?
n
l
SUPER visbiumojEcfs SECTIONDEPARTMENT OF MINES ic NORTHERN AFFAIRS'""
f ORONfO, ONTARIO
Performance and coverage credits do not apply to airborne surveys
SUBMISSION OF GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL SURVEYS
AS ASSESSMENT WORK
In order to simplify the filing of geological, geochemical and ground geophysical surveys for assessment work, the Minister has approved the following procedure under Section 84 (8a) of the Ontario Mining Act, This special provision does not apply to airborne geophysical surveys.
If, in the opinion of the Minister, a ground geophysical survey meets the requirements prescribed for such a survey, including:
(a) substantial and systematic coverage of each claim(b) line spacing not exceeding 400 foot intervals(c) stations not exceeding 100 foot intervals.or(d) the average number of readings per claim not less than 40 readings
*
it will qualify for a credit of 40 assessment work days for each claim so covered. It will not be necessary for the applicant to furnish any data or breakdown concerning the persons employed in the survey except for the names and addresses of those in charge of the various phases (linecutting contractor, etc.). It will be assumed that the required number of man days were spent in producing the survey to qualify for the specified credit.
i * Each additional ground geophysical survey using the same grid system and otherwise
meeting these requirements will qualify for an assessment work credit of 20 days.
A geological survey using the same grid system, and meeting the requirements for submission of geological surveys for maximum credits will qualify for an assessment work credit of 20 days. If line cutting has not previously been reported with any other survey and is reported in conjunction with the geological survey a credit of 40 days per claim will be allowed for the survey.
Similarly, a geochemical survey using the same grid system with the average number of collected samples per claim being not less than 40 samples, and meeting the requirements for the submission of geochemical surveys for maximum credits, will qualify for an assessment work credit of 20 days. If line cutting has not previously been reported with any other survey and is reported in conjunction with the geochemical survey a credit of 40 days per claim will be allowed for the survey.
Credits for partial coverage or for surveys not meeting requirements for full credit will be granted on a pro-rata basis.
If the credits are reduced for any reason, a fifteen day Notice of Intent will be issued. During this period, the applicant may apply to the Mining Commissioner for relief if his claims are jeopardized for lack of work or, if he wishes, may file with the Department, normal assessment work breakdowns listing the names of the employees and the dates of work. The survey would then be re-assessed to determine if higher credits may be allowed under the provisions of subsections 8 and 9 of section 84 of the Mining Act.
If new breakdowns are not submitted, the Performance and Coverage credits are confirmed to the Mining Recorder at the end of the fifteen days.
ASSESSMENT WORK DETAILS
Type of Survey ELECTROMAGNETIC SURVEY______ ""~*. A separate form is required for each type of survey
'or A,., HORNE——^---———————————
Tlhief Line Cutter, or Contractor
A. GAMBLEName
Walsh Rd. t Thunder Bay, Ontario
Party Thief RAY WILLETTAddress
Name253 Lincoln St., Thunder Bay, Ont.
Consultant PETER G. COPPERAddress
Name253 Lincoln St., Thunder Bay, Ontar.
Address
Geological field mapping by R. TURNERName
253 Lincoln St., ThunderAddress ~~~"Bay, Ontario.
COVERING DATES
Line fating AUG.15 to 24. 1970
Field_____OCT - i" 7 ' 1 970Instrument work, geological mapping, sampling etc.
Office_____OCT. 10-20, 1970__________
INSTRUMENT DATA
Make, Model and Type A CRONE JUNIOR ELECTROMAGNETIC 'f U NIT
Scale Constant or Sensitivity———^————^—————^-^—^---— Or provide copy of instrument data from Manufacturer's brochure.
Radiometric Background Count ——————————
Number of Stations Within Claim Group ——
Number of Readings Within Claim Group ——
606
606
Number of Miles of Line cut Within Claim Group
Number of Samples Collected Within Claim Group ——^
8.5
20 DAYS per claim
D
CREDITS REQUESTED
Geological Survey
Geophysical Survey D
)chemical Survey D
nATF OCTOBER 6X71sTr. NF.n-
- Includes (Line cutting)
Show Checks
D
SPECIAL PROVISION CREDITSfor
PERFORMANCE Se COVERAGE
MINING CLAIMS TRAVERSED _____List numerically^^^^^
TB 277354
TB 277355
TB 277356
TB 277357
TB 277358
TB 277359
TB 277360
TB 27736.1
TB 277362
.T.B....277363.,
TB...277.364,
TB 277365
TB 277366
TB 277367
M
f
TOTAL CLAIMS.14
Send in Duplicate to:FRED W. MATTHEWS SUPERVISOR-PROJECTS SECTION DEPARTMENT OF MINES Se NORTHERN AFFAIRS WHITNEY BLOCK QUEEN'S PARK TORONTO/ONTARIO
Performance and coverage credits do not apply to airborne surveys
SUBMISSION OF GEOLOGICAL, GEOPHYSICAL AND GEOCHEMICAL SURVEYS
AS ASSESSMENT WORK
In order to simplify the filing of geological, geochemical and ground geophysical surveys for assessment work, the Minister has approved the following procedure under Section 84 (8a) of the Ontario. Mining Act. This special, provision does not apply to airborne geophysical surveys.
If, in the opinion of the Minister, a ground geophysical survey meets the requirements prescribed for such a survey, including: t ,
(a) substantial and systematic coverage of each claim(b) line spacing not exceeding 400 foot intervals(c) stations not exceeding 100 foot intervals or(d) the average number of readings per claim not less than 40 readings
it will qualify for a credit of 40 assessment work days for each claim so covered. It will not be necessary for the applicant to furnish any data or breakdown concerning the persons employed in the survey except for the names and addresses of those in charge of the various phases (linecutting contractor, etc.). It will be assumed that the required number of man days were spent in producing the survey to qualify for the specified credit.
Each additional ground geophysical survey using the same grid system and otherwise meeting these requirements will qualify for an assessment work credit of 20 days.
A geological survey using the same grid system, and meeting the requirements for submission of geological surveys for maximum credits will qualify for an assessment work credit of 20 days. If line cutting has not previously been reported with any other survey and is reported in conjunction with the geological survey a credit of 40 days per claim will be allowed for the survey.
Similarly, a geochemical survey using the same grid system with the average number of collected samples per claim being not less than 40 samples, and meeting the requirements for the submission of geochemical surveys for maximum credits, will qualify for an assessment work credit of 20 days. If line cutting has not previously been reported with any other survey and is reported in conjunction with the geochemical survey a credit of 40 days per claim will be allowed for the survey.
Credits for partial coverage or for surveys not meeting requirements for full credit will be granted on a pro-rata basis.
If the credits are reduced for any reason, a fifteen day Notice of Intent will be issued. During this period, the applicant may apply to the Mining Commissioner for relief if his claims are jeopardized for lack of work or, if he wishes, may file with the Department, normal assessment work breakdowns listing the names of the employees and the dates of work. The survey would then be re-assessed to determine if higher credits may be allowed under the provisions of subsections 8 and 9 of section 84 of the Mining Act.
If new breakdowns are not submitted, the Performance and Coverage credits are confirmed to the Mining Recorder at the end of the fifteen days.
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LEGEND
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5aA12SWM62 2.634 HORNE 210
REVISEDe.
APPROVED
PROJ, N9 63i
DWG. N2
MAGNETOMETER SURVEY MQRNE 2
BAY M/M/MGPROJECT iSURVEYED BY^ /f., wttf-rr DATE :DRAWN BY:..............
NORANDA EXPLORATION CO. LTD.
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