S2M0tO*l24 2.34, HAMMELL LAKE

010

REPORT

ON

SURVEY

ON THL PKOPERTX OF

COIN LAKK GOLD MINES LTD.

TODD TOWNSHIP

RED LAKE ARKA. ONT.

INTRODUCTION

An electromagnetic survey has been carried put on

the lake portion of the property of Coin Lake Ooid Mines

Ltd. in Wolf Bay, Red Lake Area. It waft originally planned

to carry out the survey with a vertical loop unit to obtain

p.rcater penetration and a small portion was covered with

this equipment. However, it wae found that the conductive

responses were very strong and test work showed that the

horizontal loop equipment gave very good responses. It

was therelor dooided to carry out the entire survey using

horizontal loop equijxnent as the interpretative data is

rnort? cornvlote with this type of survey.

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Yh* l o) Lowlijf' report and a ccompanying maps describe

tin i * i u i 1 1 of the i-urvcy i.nd f ive A geological inter-

- r. t,;,:t.\o)i of tin- r t, M/.ltr .

O.1 * J y I-'H: Kke j'ortiorj of the property was covered

the- iirci't ut, turvoy end this covers the greater portion

tVo'i f R; y f i what i fi ref'errfui to ac the wtk nt portion

fuo i.: \ : o .

'fm . rc^: t.j'i y M. this- t imw of year is accessible by

! 'i''o a. 1 .'.-.i. , ; .v;. ji ; j'C -: /, i i \. r,-; f t fror-i Rod La Jet, a d istance

' !:v .i ' .".'*.t ,' ! v st-, v f. M i..i5 3 1 f ,

y o .i' I-'"', f.rea li. ahovrn on Man 49o of the

by the Ontario

M' fftir.jT.Jly .ncifrihdn by intennediate and

(U'i', c. ' '',-ttM o i' Torii f^camin^ aedimonts

' ,.i..(ji ; .1 y 'vii'i.j ...t) of UK; t'u't:fc K, u r ve- y s* c!

in- c- 1 ' ' . frorn t No ri\\i u; i cd], man, All of

"li-; M MIH.- '* vx"ob^hj.y underlain

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by sediments but the north shore is mapped as volcanics.

The contact between the volcanios and the sediments lies

somewhere- between the north shore and the base line.

The Temiskaminp sediments include greywacke, as the

most abundant rook tyoes, while slate, quartzite and con

glomerate are also found. In Wolf Bay outcrops of con

glomerate are found and also numerous outcrops of slate

occur in th* northeast end of the bay.

SURVEY i^THQDS AND .INSTRUMENT DATA

The electromagnetic survey was carried out over

previously cut lines in a northwest direction at 200 foot

intervals.

The vortical loop equipment used was a McPhar type

unit with a 45 foot perimeter transmitting loop and read

ings wen. taken with coil spacing up to 1,000 feet, as

shown on the accompanying map. The transmitter 8et~uj)B.

were laid out along the strike of the indicated conductive

zones and the dip angles are plotted as profiles on a a**' ""H***""* l*-'-****'*V"*"'*JW''

scale of 1 M equals 20 degrees.

The horizontal loop electromagnetic survey was

carried out using the Konka Mark H horiaontal loon

PROSPECTING GEOPHYSICS LTD.

equipment with a 300 foot ooll Interval. In the horiaon-

tal loop type of survey both the In-phase and out-of-phase

components of the secondary field are measured, whose

special characteristics make possible a fairly accurate

evaluation of the conductivity. A conductor caueed by

eulphide mineralization will produce a curve going from

oositive readings throng sero to negative and back again

to positive. Both the in-phsse and out-of-phase readings

show the same general curve* The ratio between the in-

phase and out-of-phase readings over a conductor is an

indication of the conductivity of the body. A good con

ductor would cause a greater deviation of the In-phaae

co:n?.onant than the out-of-phase component. The opposite

is true of a poor conductor.

RESULTS OF THg l^LECrROMAQNETXC SURVbY AND ir'TSflPftETATION

The electromagnetic survey outlined a series of

more or less parallel conductive eones In a northeast direc

tion. The conductors vary in length and width but generally

are quite continuous and in some oases in the south end

of the area surveyed, extend beyond the lake onto the9

shore.

^ f ^ PROSPECTING GEOPHYSICS LTD.y *

The majority of the conductor* would appwar to 11*

within the sedimentary rooke although "A" son* along th*

north contact le within the volcanic rooks. The conductori

Arc generally quite strong and In Bom* eases, from th*

intensity of the readings, they appear to b* at a relatively

shallow depth. A brief description of each of the conductive

zones follows:

"A" ZONK

This conductor is quite strong and very continuous,

following the shore line throughout the survey. The con*

ductor was picked up in both the vertical and horisontal

loop surveys. Unfortunately, it was not possible to obtain

the full width of the eone due to a sharp rise at the

shore line. It was also difficult to determine the din

of the zone but it is t-robably to the south.

The conductor probably lies along either a contact

or a fault eone. Prom the continuity, either graphite or

iron formation le suggested and nagnetic information would

help determine* the cause of the conductivity. Geological

examination along the ehore may also be of assistance.

PROSPECTING GEOPHYSICS LTD.- 6 -

"B" ZONfc

This zone i 6 at the south side of the bay and Ho

within the sediments, it ie pretty well continuous

acroes the bay 6nd continuet onto the shore in both direc

tions. At the west end it appears to show a very great

width but it nut y possibly be made up of a number of closely

spaced narrower zones. This could be particularly true

if the conductor is due to graphitic slates. Further north*

east the conductor ie shown as two or three separate

zones which include "I" and "J", It seems apparent that

these conductors are similar and would be caused by the

same type of mineralization.

The conductivity is quite high, esoecially at the

weat end where it goes onto the shore. Examination for

outcrops in thin area may give a clue as to the cause of

the conductor.

"C" ZONE.

This parallels "B" zone but ie much weaker and does

not appear to bt. as continuous. However, "I" zone may

well be the continuation of this zone to the east. It

prob&bly represents the Bame material as MB W zone.

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"D" ZONE

Thin conductor also parallel* "B* clove to the shore.

Only the north edge of the conductor ha* been outlined

as the line* would have to be extended to the south to

determine the full width and extent of the tone. This

again is interpreted ae representing the same Material as

"B" *one.

It is not possible to determine the dip of these

zones because of their elose proximity to each other but

it le likely they are near vertical or conform with the

regional schistosity.

"E" AND "G* 30NE3

"S" aone has a length of 2,600 feet and "G" Bone is

offset to the south at the east end and continues for

another 3*000 feet. The two conductors appear to be

similar and lie within the sediments. Prow the continuity

of these conductors and the fact that they are within the

sediments, one suspects graphite but magnetic information

should help in the Interpretation as it could possibly

represent sulphides or a band of iron formation with

sulphides.

PROSPECTING GEOPHYSICS LTD.

"F* ZONE

This zone has an indicated length of 1,000 f t e t but

may poaalbiy extend further in both directions and it

weaker arid masked by overburden. This ie suggested by

the profiles ana the vertical loop survey showed a con

ductive resoonee on line /*6W that could be the extension

to the southwest. The conductor shows the best response

on lino e 38W and 36 W and since this zone could be in the

volcanics, it may well represent sulphide mineralisation.

"H* , "I*. AND,*! J

These zones show as closely spaced parallel conduc

tors within the aedimdnts and could represent graphitic

slates with or without sulnhidos. Geological examination

on the point of land should helt* to determine the cause

of the conductor. This r.rour) of conductors can probably

be grouped with B, C and D zones and information from one

of these should determine the significance of the others.

"K"

This* ah owe as a weaker and shorter conductor along

the some strike as "B" zone. It may well be masked by

PROSPECTING G EOPHYSICS LTD.. 9 .

overburden fur-the r alonp strike. This is probably

located olooe to the volcanic-sedimentary contact and the

dip appe&rs to be steeply to the north.

"L" ZONE

This conductor only has a length of 200 feet but it

appears to continue in both directions and may be masked

by overburden. It lies within the sediments and shows

the greatest conductivity on line 22E and shows an

aoparerit steep dip to the north.

"M" ZONE

" M" Zone appears to be within the volcanic rocks and

has an indicated length of about 400 feet. It shows the

greatest. width on line 22B and the dip appears to be to

the south. This could well indicate sulphides within the

volcanic rocks.

"N" AND "Q" ...

Those two conductors are groupud together as they

have similar characteristics and also more or less Iden

tical geological environment. They ere both within the

sediments which are most likely slate in this area and in

- 10 - PROSPECTING GEOPHYSICS LTD.

both cases they appear to be almost along tht north eon-

tact of granite dyke*. They possibly represent a contact

shear cone which may contain graphite and/or sulphides.

The* full width of theae tone* haa not been indicated

&B they are both close to the short. This alao makes it

difficult to determine the dip but it probably ia ateep

to the north*

"P" ZQjfg

Thie ie another tone that lies within the volcanic*

and obvioualy oontinuea further eaat on land* The con

ductivity is not etrong but the geological environment

would favor aulphidea aa the cause of the conductor.

CONCLUSIQNS1 AMD REOOMMENDATIONS

The electromagnetic survey outlined multiple parallel

conductive aones striking in a northeast direction which

more or lees parallels the trend of the band of sediments

that underlie the southerly portion of the property*

It in apparent that most of the eonduetora within the

sedimentary rocks are similar in characteristics and

probably have a common cauae. In view of the continuity of

- 11 - PROSPECTING GEOPHYSICS LTD.

the conductors and tha known presence of slate, there

would appear to be a good chance that graphitic slat**

may be tho cause of the oonduotivity* However, many of the

zones show very big- conductivity and it is thus quite

possible that sulphide mineralisation nay also be a con

tributing factor. Geological examination of the shore

line and magnetic data on the conductors would be of great

assistance in interpreting the results prior to diamond

drilling. It does not eeem advisable to drill too many of

these zones unless initial drilling is encouraging as the

indications are that they are similar*

The conductors within the volcanics may be of signi

ficance and could well represent sulphide mineralisation.

Again t magnetic data would be of help in the interpretation.

Included in this category are "F", "M", and MP" aones

End poBcibly "K". Diamond drilling is recommended on these

cones unlese additional information dictates otherwise.

"A" zone is a very continuous Bone and geological

information should determine if drilling is warranted for

thie zone.

It is diflMcult to determine thf dip of the sones

PROSPECTING GEOPHYSICS LTD.- 12 -

due to the proximity of the conductors and the lack of

detail on others near the shore. Thie is due to the faot

that the survey was limited to the lake and lines were

not extended on land. However, the dip appears to be quite

R tee p and in roost oases it is probably to the north but

may vary locally.

Reoonunended drill locations are as follows: "F" - line

33W, "E" - line 34W, "B" ~ line UW, "M" - line 22B, "P" -

line WE, "K" - line aw, and "O" - line 62E. All holes

should be located armroxiotately 150 feet from the con

ductor and drilled at 50 degrees. In moet cases they should

orobably be drilled from the northwest side of the conductor.

Results of initial drilling and other interpretative

data obtainable will largely dictate whether all of the

aoove drilling chould be carried out.

Respectfully submitted,

PROSPECTING GEOPHYSICS LTD.

H. J; BergsJejin, PT En*

Montreal, Que. March 6, 1970.

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ADDENDUM

TO ftEPOH OH

ELKCTROMAONfiTIC SURVCf

IAKK QX.0 I TP.

TODD TOWNSHIP.

The following is an addendUui to the report, dated

Maroh 6, 1970, describing the electromagnetic survey

carried out in Wolf Bay, Todd township, for Coin Lake

Gold Mines* The original BUTTS? was dons on ths laks por

tion and sinos that tis* ths surrey has been extended to

the land portions on the east and west ends of the pre-"*-*..~^ i -, (.u.,, .'J-',." .-.-i *-- i'" - - ' -' '' r- -.- i , . .J ,... f. ; M. ...i-,. - ".v M, H- -i "ir "-iJ**. H ' '.-'-.-.rf-.-i .i,.- .......,...... , . , ,.j n, , , .,.i| ., ,... d ..^j,,,,. M, -,^.ia ,. l ,M ... ., r ,, ,. ... ( j. ,. .,...,.,-..,, ,. ^1U( h-,,, ,,r...rH rtt.hi( ,W.W"*1 *afirf*3H*t.' .

vioue survey. The results of the resent eleotroaiagnetio

surrey have been plotted on the sane nap and the revised

maps accompany this report.

A brief description of the results follows:

EAST END

The additional survey at the east end of the Bay

was oarried out along north-south lines previously cut.

This survey outlined the extension of "P* and also ooer-

pleted "O* Zone. To the south of "O", another series of

— j, ,, PROSPECTING GtOPHYSICS LTD

conductive bodies were alto outlined and these are

referred to ne "R" Zone.

"P* Zon,e

This zone was extended to the east, giving it a

total length of about 1,600 feet. It i* wider at the

east end and ie aleo stronger. This is in the volcanics

close to the volcanic-sedimentary contact*

"O" Zone

The extension of the survey here indicates the

width of the eon* which is fairly narrow as compared to

the other sones. The dip appears to be to the north*

"ft"

This is a sone containing very wide and strong

conductors trending in a northeast direction. They extend

further to the east and probably join up with "N" sone to

the west. It is difficult to determine from the profiles

in places whether it is one wide conductor or a series of

parallel conductors that give a wide response.

The conductor* are in the sediments but appear to

be on the south contact of a granite dyke. From the

PROSPECTING GEOPHYSICS LTD.

appearance of the conductor! and the geological environ

ment, the conductors are believed to b* eauted by graph It*

with possibly son* sulphides, These conductors lint up

with "I", "J", "B", and "D" tones and th*f probably all

are similar.

WEST END

The survey at this end was carried out along lines' " Wtton.*.*^-".

cut in a northeast direction* The Island on which the

survey was extended has a north-south contact between the

granite and the sediments. Some weak responses war*

obtained that may possibly represent the contact son*. They

do not appear to be of much significance.

However t in the narrows between the islands, strong

responses were obtained on l in e e 10S, 203, and 2J*8. It it

difficult to know if this represents a north-eouth trend

ing zone or whether they are the extensions of "B" and "D"

eones to the west. The two interpretations are shown with

the north-eouth conductor in red. If the sediments are

actually striking north-south, the north-south interpreta

tion is favored but if the sediments continue east-west

and butt up against the granite, the east-west interpretation

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- 4 -

is fuvorad.

CONCLUSIONS AND RECOMMENDATIONS

The extension to ths origins! surrey helped to

delineate some conductors and also outlined further strong

conductive aoru*s within the sedimentary rocks. These line

up on strike with previous s ones and it is apparent that

there are more or less continuous conductors within the

sediments in the south portion of the area surveyed. As

mentioned previously, these probably represent the same

type of conductive material and because of the character

istics and the geological environment, it seems likely

that graphite le the main cause.

Geological examination is recommended on the land

i/ortions of the conductors as it is quite possible this

may determine the cause. Some trenching could possibly be

done in areas of light overburden in an effort to determine

if drilling is justified.

Respectfully submitted,

PROSPECTING GEOPHYSICS LTD.

Montreal, Que., H. J. Bergmartn, P. May 7, 1970.

atlv\KJi

DISTRICT K\TmciA

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Scale 40G]flins -l I pel?

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KKNORA•M.22IONTARIO

DEPARTMENT OF MINES AND NORTHERN AFFAIRS

"'^ y AW.^/*S

S2MetSEeiS4 2 .341 HAMMELL LAKE

A3 Transmitter set-up and number

Profile s^ale - l"*20 0 j;' i\ - :

Profile of jEM readings from Transmitter set-up No.3 Electrical Conductor i

VERTICAL LOOP

ELECTROMAGNETIC SURVEYfor

COIN LJVKE GOLD MINES LTDWo J f Bay Grid, Ontario

SCALE 200 400 600 FEET

M A R. 1970

PROSPECTING GEOPHYSICS LTD.

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