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41P1SNE8841 2.2258 POWELL
t
REPORT ON THE PROPERTY
OF
COPPER LAKE EXPLORATIONS LTD
POWELL TOWNSHIP
DISTRI CT OF TIMISKAMING
ONTARIO
010
NOV l Z w
PROJECTS UNIT
tToronto, Ontario August 8, 1975
Thomas Skimming, P. Eng
-•HUDSON S A C
Location of COPPER LAKE EXPLORATIONS LTD
Property
PALEOZOIC AND MESOZOIC
[ j
PRECAMtRIAN
t
THOMAS SKIMMING fi ASSOCIATES LIMITED
Property Location Map
Powell Township Claims——
COPPER LAKE EXPLORATIONS LTD
District of Timiskaming, Ontario
August, 1975 Plan No. l
fINTRODUCTION
As a result of a new discovery of gold In a pyrttfc alteration zone in quartzite of Timiskaming age In the former gold mining camp of Matachewan, Ontario, Copper Lake Explorations Ltd. negotiated an option agreement to acquire the property and to carry out a systematic exploration programme to assess the economic potential of the discovery.
This report reviews the results of the limited amount of explora tion work completed on the property to date and, in addition, discusses the nature of the gold mineralization and proposes a two phase exploration programme to assess the significance of the gold discovery.
The report is based principally on an examination of the property by the writer and on a study of all the pertinent technical data published by the Ontario Department of Mines.
DESCRIPTION OF PROPERTY
The property of Copper Lake Explorations Ltd. consists of a group of ten, contiguous, unpatented mineral claims, each approximately forty acres in size. The claims are illustrated on Plan No. M241, published by the Surveys and Mapping Branch of the Ontario Ministry of Natural Resources and titled "The Township of Powell, District of Timiskaming, Larder Lake Mining Division".
The Copper Lake claims are Identified on Plan No. M2^1 as fo l lows:
L367899 L372908L367900 L372909L372901 L372910L37290^4 L372911L372905 -
These claims are outlined and coloured in yellow on a copy of Plan No. M2**l accompanying this report.
LOCATION AND ACCESS
t
The property is located k O m iles by road, west of the town of Kirkland Lake, Ontario and more specifically in the centre of Powell Township in the District of Timiskaming, approximately k m iles by road, northwest of the community of Matachewan.
-2-
tAccess to the property Is by way of Highway 66 from Kirkland Lake to the town of Matachewan, a distance of 36 miles, then by way of Highway 566, northwest from Matachewan for a distance of 4 miles to Ryan Lake, which is situated on the eastern end of the property. An unimproved road, suitable only for a k wheel drive vehicle,leads westerly from Ryan Lake for a distance of approximately one mile across the property to the gold occur rence which is the subject of this report.
The location of the Copper Lake property is shown on Map N.T.S. 41 P/NE (Elk Lake Sheet) published by the Ontario Ministry of Natural Resources and on Plan l prepared by Thomas Skimming 6 Associates Limited, both of which accompany this report.
TOPOGRAPHY AND VEGETATION
The property of Copper Lake Explorations Ltd, Is characterized by a gentle relief, typical of the Superior province of the Pre cambrian Shield. It is well forested with second growth black spruce and jack pine. Large stands of white birch and popular are common, particularly in areas previously ravaged by forest fires.
The community of Matachewan, located 4 miles southeast of the Copper Lake property, served the mines In the district when they were operating. Today, it functions mainly as a base fdr supplies for logging operations and as a tourist attraction.
An electric power transmission line leading from Matachewan to Ryan Lake, crosses the eastern end of the Copper Lake Explora tions Ltd. p rope rty.
t
HISTORY AND PRODUCTION
The history of exploration and mineral production of the Matache wan area within which the property of Copper Lake Explorations Ltd. is located, is summarized chronologically in Geological Report 51, published by the Ontario Department of Mines as fo l lows:
"In the Matachewan area, prospecting has been carried on since the discovery of silver near Elk Lake In 1906. During the early years, gold was discovered in the southeastern part of Alma township and In the north central part of Cairo township. In 1916, Jake Davidson discovered gold near Davidson Creek, on what Is now part of the property of Young-Davldson Mines Limited. Shortly thereafter, Sam Otisse discovered gold on claims that now belong to Matachewan Consoli dated Mines Limited. The Young-Davidson property was investigated chiefly by Porcupine Goldfields Develop-
f
t
-3-
ment and Finance Company Limited, and the property of Matachewan Canadian Gold Limited was Investigated by Colorado-Ontario Development Company Limited. In 1919, Matachewan Canadian Gold Limited,was reorganized under the name of Matachewan Gold Mines Limited. From about 192** until the price of gold was raised in January 193^, the properties lay idle. Then, after intensive sampling of the Young-Davidson property, Hollinger Consolidated Gold Mines Limited erected a mill and, on 8 September 193**, production was begun at the rate of 500 tons per day. By 1956, when the mine was closed, 6,128,272 tons of ore con taining 585,690 ounces of gold and 131,989 ounces of silver had been produced. Ventures Limited completed a program of drifting, diamond-drilling, and sampling on the property of Matachewan Gold Mines Limited, and then erected a mill. Production began on August 193^, at the rate of 85 tons per day. In 195^, when the mine was closed, 3,535,200 tons of ore had been mined, from which 370,J)27 ounces of gold and 133,710 ounces of silver were recovered. The Ryan Lake property of Pax International Mines Limited has been In production intermittently under various company names since 1950, The property had produced '4,753,650 pounds of copper, 1,309 ounces of gold, and 3^,589 ounces of silver by the end of 1956, Since August 196^ a bulk concentrate of molybdenum and copper has been recovered from tail ings produced by former operations on the property."
Prior to the discovery of gold In the spring of 1975 on the property under option to Copper Lake Explorations Ltd., previous work was limited to basic prospecting involving some exploratory trenching and pitting. The most aggressive programme was under taken by Mr. Harold King of Matachewan subsequent to his discover ing gold on the property. This work consisted of trenching and sampling of the gold-bearing pyritic zone In the north central portion of the claim group. A longitudinal section (Plan No. 2) of the trench in the vicinity of the gold discovery Illustrating the location and results of samples collected from the auriferous zone accompanies this report.
REGIONAL GEOLOGY
The regional geology of the Matachewan area may be seen on Map 2110 "Powell and Cairo Townshlps, Timiskaming District", which accompanies Geological Report 51 published by the Ontario Department of Mines.
This area forms a small part of a large belt of "greenstones" extending from southwest of Timmins, Ontario to Chlbougamau, Quebec. The oldest rocks in the area are volcanic and are
t
overlaln by tightly folded sedimentary rocks. Both the volcanic and sedimentary rocks are cut by mafic and silicic intrusions. The Intrusive rocks, In turn, are cut by a north- south trending swarm of diabase dikes. Flat lying sedimentary rocks overlie all of the above and are Intruded by a few late d i aba se d lkes.
The volcanic rocks in the map area are folded into a syncline whose axial trace trends approximately northeast from the south- west quadrant of Powell Township. On the southern limb of the syncline, a relatively strongly magnetic stratum trends south- east to the western part of Powell Township. Evidently, the syncline plunges southeast. Both limbs appear to be offset (left-hand) by a fault that runs through Mistinlkon Lake, and truncated a short distance farther east.
Prospecting in the Matachewan area has been concentrated in quartz veins near the borders of granite and syenite stocks and cupolas, in shears or faults, and in gossan zones. The gold deposits are all in or near quartz veins that follow shears or closely spaced fractures or faults.
LOCAL GEOLOGY 6 MINERALIZATION
Based on a study of Map 2110 (Powell and Cairo Townships) published by the Ontario Department of Mines, the property of Copper Lake Explorations Ltd. Is underlain largely by steeply dipping quartzite, argillite and conglomerate beds of Timiskaming age. Because of the deformation in the area, the attitude of the sediments is highly variable; however, in the Immediate vicinity of the "gold discovery", the beds strike east-west and dip steeply to the north (75-85 degrees).
A medium grained syenite with some porphyritic phases outcrops In the south central portion of the property. it is within this syenite that most of the known gold deposits in the Matachewan area occur.
A north-south trending swarm of diabase dikes occur on the eastern portion of the property where the density of outcrop is highest.
The gold-bearing, pyritlc, alteration zone occurs In the north central portion of the property (see modified Map 2110 accom panying this report) within a fine grained quartzite member of the Timiskaming sedimentary group.
The alteration zone is characterized by a boxwork of wispy randomly oriented stringers and veinlets of bull quartz which rarely exceed l inch in width. Small fragments and particles
•5-
of shale, invariably containing pyrite, are common but appear to be confined to the alteration zone. Pyrite Is ubiquitousin the altered zone, occurring stringers but a l so associated wi hairline fractures in the rock, disseminated grains within the tural cont ro l .
principally In the quartzth the shale fragments and along
Occasionally, It occurs as quartzite with no obvious struc-
Although field evidence is limited at this time, the pyrltlc, alteration zone may represent a silicified shear zone into which gold and pyrite was Introduced at a later stage. Consi derably more field work is required before the structural setting of the gold mineralization will be evident.
The results of the grab and chip samples collected from the trench, within which the gold-bearing pyrite zone Is exposed, are tabulated be low:
Samples Collected by T. Skimming
Samp l e Number
HK-1 HK-2
HK-3 HK-4
HK-5
Gold (Au) o z/1on
0. 1420.047
0.0160.0430.039
SMver Zinc (Ag) oz/ton (Zn) 5
0.12 0.020.02 0.01
0.03 0.01
0.01 0.01
0.06 0.02
Cert l f Icateof
Ana lysis
T-9629 ^ T-9629 ' T-9629 ! T-9629 r T-9629 '
Samples Collected by H. King
Samp l e Number
l
151521
1
2
3 DC-1
Gold (Au) oz/ton
0. 12
0.23
0. 19
0.02
0.05
0.07
0.03
SI Iver (Ag) oz/ton
0.31
N/A
N/A
N/A
N/AN/A
Q.Ok
Zinc (Zn) %
0.27
N/A
N/A
N/A
N/AN/A
0. 19
Cert l f tcateof
Ana l ys Is
45379 17 45366 "' 44889 l'' 45443 ^
45443 7 4S443*7
44889 *"
The locatlonsof the above samples are graphically Illustrated in Plan No. 2 accompanying this report where it Is evident the highest gold values are from the pyritlc altered zone at the north end of the trench.
-6-
SUMMARY 6 CONCLUSIONS
The results of the limited sampling oftheauriferous pyrite zone carriecl out to date suggests an intimate relationship between the gold and pyrite. The highest gold values from the trench sampling coincided with the highest pyrite content and converse l y, the lowest gold values were obtained In the quartzite where, the pyrite content was only minor. In effect, an induced polarization could represent an Indirect but effective method of exploring for gold on the property.
Anomalous quantities of silver and zinc appear to occur with the gold In the pyrltic zone which suggest soil geochemistry as a useful supplemental exploration technique to the l.P. su rvey.
RECOMMENDATIONS
On the basis of the encouraging results obtained from the work carried out both by the property owners and Independently by the writer, further work on the property Is warranted.
A two phase exploration programme Is recommended wherein the first phase will consist essentially of geological mapping, trenching, soil geochemistry and an Induced polarization survey for the purpose of developing targets for further test ing by diamond drilling. The second phase will be contingent on favourable results from the first phase and will consist exclusively of diamond drilling.
A grid to provide the necessary control for the proposed exploration programme should be constructed in the vicinity of the gold-bearing, pyrite zone. The grid should consist of a baseline, 4,000 feet in lenth, oriented east-west with cross lines, each 2,000 feet in length, at intervals of 200 feet along the baseline. Pickets should be located every 100 feet along the grid.
Because of the disseminated nature of the pyrite coupled with the affinity the gold displays for the pyrite, an Induced polarization survey is recommended to define the boundaries of the gold-bearing pyritic zone beneath the glacial over burden and to explore for other pyritic zones In the Immediate area of the "gold showing" that may also be auriferous.
Because of the apparent association of silver and zinc with the gold, a systematic soil geochemical survey should be carried out in the general vicinity of the "gold showing". The results of this survey could prove extremely useful In interpreting the results of the l.P. survey.
Further trenching and trench sampling Is recommended to obtain some information on the uniformity and grade of gold In the favourable zone.
-7-
ESTIMATE OF COSTS
PHASE l
Line Cutting (Control Grid) $ 1,700 (1)
Geological S Geochemical Surveys 4,200 (2)
Geophysical Survey (Induced Polarization) 7,500 (3)
Chemical Analyses 3,500 ( k)
Trenching S Trench Samplirig 1,500 (5)
Transportation 1,500 (6)
Supplies 6 Equipment 1,600 (7)
Engineering S Supervision 6,000 (8)
Contingencies 2,500 (9)
$30,000
PHASE l l
Diamond DM l l Ing $J*0,000 (1)Engineering 6 Supervision 3,000 (2)
Contingencies 2,000' (3)
$i*5,000
EXPLANATION OF COSTS (PHASE l)
The foregoing estimate of costs is based on an exploration programme consisting essentially of geological mapping, trench ing, a soil geochemical survey and an Induced polarization survey. The costs are further based on the assumption that the field programme will require approximately li months to complete.
(1) The sum of $1,700 estimated for line cutting allows for 10 line miles (base line and grid lines) of cutting and picketing at a cost of S170 per line mile. '
(2) The sum of $4,200 estimated for the geological and geo chemical surveys allows for the employment of one senior geologi s t-geochemi s t for li months at a rate of $1,800 per month ^2,700) and a Junior geologist for li months at a rate of ^1,000 per month ^1,500).
(3) The sum of $7,500 estimated for the Induced polarization (l.P.) survey allows for 10 line miles of l.P. survey using a 200 foot electrode spacing, requiring an estimated
t
-8-
15 days of survey time at a basic cost of $500 per geo physical crew day.
The figure of $3,500 estimated for chemical analyses allows for 350 combined soil and trench samples at a unit cost of $10 per sample.
(5) The sum of $1,500 fof trenching and trench sampling allows for the employment of a field assistant, ex perienced In the use of a rock drill and explosives, for a period of H months at $1,000 per month.
(6) The sum of $1,500 estimated for transportation provides for the mobilization and demobilization of personnel and equipment, the routine transportation of geochemical samples to the laboratory and all other field transporta tion requirements.
(7) The amount of $1,600 estimated for supplies and equipment includes the cost of camp equipment, general field equip ment, equipment rental, food and fuel.
(8) The sum of $6,000 estimated for engineering and supervi sion Is based on a rate of $3,000 per month for a period of two months which would Include programming and logis tical planning, direct programme supervision and the compilation and Interpretation of all field data.
(9) The figure of $2,500 represents a contingency factor of approx i ma te l y. 83; of the total estimated programme cost.
EXPLANATION OF COSTS (PHASE M)
Phase M of the programme proposed herein Is contingent on favourable results from the exploration programme recommended in Phase l. The estimate of costs in Phase II, which would consist essentially of diamond drilling, Is based on a nominal programme Involving 2,000 feet of drilling and on the assump tion that the programme will require approximately one month to complete.
(1) The sum of $^^0,000 estimated for diamond drilling allows for 2,000 feet of drilling at an all inclusive price of $20 per foot or a basic price of S15 per foot ^30,000) and an allowance of $10,000 for mobilization and demobill zatlon of drill equipment, tractor rental, additional costs In long drill moves, core boxes, sample bags, apportioned salary of a senior geologist applicable to drill programme (i.e. logging and sampling drill core, spotting drill holes and general supervision of drill programme), general supplies, fuel, transportation and all other costs not included In the basic footage price.
-9-
(2) As In Phase l, the estimate of $3(000 for engineering and supervision Is based on a rate of^3*000 per month for a period of l month and would Include the planning and supervision of the drill programme and the compila tion and interpretation of all the field data,
(3) The figure of $2,000 represents a contingency factor of approximately H& of the total estimated programme cos t.
Respectfully submitted,
Toronto, Ontario August 8, 1975
{111 p* CHKMICAL NEBCAMCH AN 1 '
* CONTHACT LABOKATOMICS
GEC2VOCCOIVIIION Of (UKOINKK TiCHNICAk IMTfKfHIHt LIMITIO
518 EVANS AVE.,TORONTO. ONT., M8W 2V4 CANADATELEPHONE: 252-5895-AREA 416
CABLE ADDRESS: T ECSERVpj
,,jCERTIFICATE OP ANALYSIS
6AMPLB(S) FROM Thomas Skimming and Associates Ltd.,f-f Wh.*. V ^ db 4 .h. f B *' *~ * *W*W ^
Islington, Ontario M9A 4X9
SAMPLEtS) OF ROCKS
HK-1 '
HK-2 '.' -"
HK-3 '
HK-4 '
HK-5 s
Gold (Au) oz/ton
0.142
0.047
0.016
0.043
0.039
REPOP
T-96;
Inv.
Silver Zinc (As) oz/ton (?n)^
0.12 0.02
0.02 0.01
0.03 "*0t01.
0.01 ^.01f
0.06 0.0 e
.T NO.
29
0513
Notes Samples from the gold showing ofCopper Lake Explorations Ltd, Powell Township, Matachewan area, Ontario
Samples, Pulps and Rejects discarded after two months
DA HiCi A
Swastika, Ont, POK 1TO, ...,.T,.,,,.,,,r,r,,r,....,..,.19, , June 13/7!)SWASTIKA LABORATORIES LIMITED
of
We have assayed..........^™.........-..OI16--~"—-•"••••••——"-———--••••-samples of .......-.............................................(jjrQ..............
Received.M.,....J.vm0..-l-lT1.97"S--"8nd submitted by™.....4J^ni*y:~4y:nj?j-|--BsqT-"-—"——-———"-——
..u....—..-........-...."..-............~~..-.™~~-,...........-....with the following results:
Sample Gold No. Ozs/ton
1515 ' 0.23
SWASTIKA LABORATORIES LIMITED,
In accordance with long-established North American custom, unless it is specifically stated otherwise gold and silver values reported on those sheets have not been adjusted to compensate for losses and gains inherent in the fire assay process.
S\v Mika, Ont,, POK 1TO,
SWASTIKA LABORATORIES LIMITEDAtudpis
We have assayed __ .................Si*™ _______ . _ - _ -samples of __ ,. _ .i _ ..9.L?...
SampleMo.
123^56
Gold Ozs/ton0.120.06Nil0.120.010.01
™, —— -,.......w........,..™..™,...— .................with the following results:' *"'
•Silver Zinc Ozs/ton f0
0.31 0.27
SWASTIKA LABORATORIES LIMITED,
^.-- ^ ^ " l.-, IV, .;per:
In accordance with Ion?-established North American custom, unless it is specifically stated otherwise gold and Eilver values reported on these sheets have not been adjusted to compensate for losses and gains inherent in the fire assay process.
Swastika, Ont., POK 1TO, ...j^.y,.^,..^^
SWASTIKA LABORATORIES LIMITED(Emifirate of Aualpta
We have assayed-.,—,-~—..,..—•h^rnec—~~'-™-————samples of.
Received——t1Ti-~r,—R....a..fia,c..———and submitted by—
..with the following results:
Sample GoldNo* Ozs/ton
l 0*02 J
2 0 .05 V3 0*07 J
SWASTIKA LABORATORIES LIMITED
port
In accordance with lone-established North American cuatom.unless it is specifically stated otherwise gold and silver values afceet* have not been adjusted to compensate for losses and gains inherent in the fire assay process.
Swas '"ika, Ont., POK 1TO,,...,,19.X.. 6 ,.1.97419..
SWASTIKA LABORATORIES LIMITED(fertiftcute of Analpte
No 44339*l WtM*MM**t*IMt*IMI*l**l**4M
We have assayed,...™.,..,.....—L.V.HJ........................_................samples of ......,..-.....,.,.,
ReceivecN&Y . 2 fc. 4/74 And submitted bv Dan Campbell. Esq.*.WnlWl VV.'UhKJWt*Xxllll'nri l |i..MV(ll(.l|I.1.1ftHol(l((X4I.MH*OIMHHIHl.l*(*IIIlU BUUIII* VVCU IJjrH.HM('l(IMI'it(IM*4l*l(*ritl**'tl.|IM*tIlt*M*ll(*'"HHt.llMltinill1M.Ot.O.MtlA4I'...l*l'O.IMIIIl*COt((..4l.ll..*l.KM(.KI^*ttM
—...............i——.,n..........,,,..,with the following results:
Sample Gold Silver ZincNo. ' :Ozs/tan Oas/ton ^
i
pc-/ 0 .03 0.04 ! 0.192 Nil
]2 N^j__^21 """O.I?"
SWASTIKA LABORATORIES LIMITED,
per: '""' ' f ~ - ' ""*"*-Jk- "
In accordance with Ions-established North American custom, unions it is specifically stated otherwise gold and silver values reported on these sheets have not been adjusted to compensate for losses and gains Inherent In the fire assay process.
41P15NE8241 2 .2258 POWELL 020
MINING LANDS SECTION
REPORT ON AN INDUCED POLARIZATION SURVEY
ON BEHALF OF RECEIVE^
MOV l b 197b
PROJECTS UNIT THOMAS SKIMMING AND ASSOCIATES
NEAR MATACHEWAN, ONTARIO
BY
GEOTERREX LIMITED
Project No. 85-397
OTTAWA L. Wilson, B 0A 0 OCTOBER 1975 Geophysicist
P. Norgaard, P. Eng Geophysicist
R. Keith, B. Se. Geophysicist
ggoterrex
lo INTRODUCTION
In the period from October 2 to October 9, 1975,
Geoterrex Limited of 2060 Walkley Road, Ottawa, Ontario, com
pleted an Induced Polarization survey on behalf of Thomas
Skimming and Associates of Suite 1417, 52 ("labelle Avenue,
Islington, Ontario.
The induced polarization survey was completed on a
claim group located approximately 4 miles northwest of Mata
chewan, Ontario.
The purpose of the loPo survey was to test a known
mineralized showing for its polarization response/ map the
extent of the zone if possible and then cover the remainder of
the precut grid in a reconnaissance fashion in an attempt to
map the distribution of other similar zones of disseminated
metallic sulphides.
The field work was carried out under the direction
of L.Mo Wilson, B.A., a Geoterrex staff geophysicist 0 The
project was completed under the direction of Ro Keith, senior
geophysicist. Mr. J 0 Perkins, representing Thomas Skimming
and Associates, was on site for the duration of the survey to
oversee the operation.
gioterrex
2.
II. PERSONNEL
The following is a list of the Geoterrex personnel
necessary to the completion of the induced polarization survey
as well as the time spent by each person on the project during
the field operation and in the office for the completion of
the compilation and the final report:
Field Survey
Name and Address Number of Production Days
LoMo Wilson, Geophysicist 2450 Southvale Crescent Ottawa, Ontario
J. Crook, Geophysical Operator 1735 Rhodes Crescent Ottawa, Ontario
Office Compilation and Report
LoMo Wilson, Geophysicist 2450 Southvale Crescent Ottawa, Ontario
Jc, Crook, Geophysical Operator 1735 Rhodes Crescent Ottawa, Ontario
P 0 Norgaard, Geophysicist 2 Rebecca Crescent Ottawa, Ontario
gjgoterrex
3.
In addition, two survey assistants were provided for
the field work by Thomas Skimming and Associates.
The Geoterrex personnel and equipment arrived in Mata
chewan on October 2, 1975, but due to lack of survey assistants
at this time, the field work did not commence till October 4,
1975 and was completed on October 8, 1975,
OROteirex
4.
Ill o GEOPHYSICAL SURVEY INSTRUMENTS
"Time Domain" induced polarization equipment was
used for the completion of the present project.
Two transmitters were provided for the survey namely
a portable battery powered 250 watt unit manufactured by Crone
Geophysics Limited of Mississauga, Ontario, and a 1.5 kilowatt,
motor generator powered unit manufactured by the Elliot Geo
physical Company, Tucson, Arizona. It was anticipated that
most of the survey grid could be covered employing the portable
transmitter as there is very little overburden in the area
except possibly for the south-west corner of the grid which is
covered by swamp.
A Scintrex manufactured IPR-8 induced polarization
receiver was used throughout the survey. It is a state-of-the-
art instrument capable of measuring up to six points on the decay curve using a two second current on-time followed by a
two second current off-time as was employed for the present survey. The waveforms, modes of operation and times involved in the automatic programme are shown in the appendix to this
report. For the present survey the receiver was operated in
the "three slice" mode and readings were taken for the middle
slice only. For this slice integration takes place from 650
to 1170 milliseconds with zero time being the cut-off time of
the transmitted signal.
gRoterrex
All chargeability readings have been converted to
the "Newmont Standard" so that the polarization responses
noted are equivalent to those which would have been obtained
with a timing cycle of three seconds current on-time, 3 sec
onds current off-time and integration over one second.
Detailed specifications for the various instruments
used are included in the appendix to this report.
ggoterrex
6.
IV. GEOPHYSICAL SURVEY
l. General Description of the I 0 Po Method
The induced polarization method is based on the
electro-chemical phenomenon of overvoltage, that is, on the
establishment and detection of double layers of electrical
charge at the interface between ionic and electronic conducting
materials when an electrical current is caused to pass across
the interface. In practice, two different field techniques,
namely, Time Domain dnd Frequency Domain have been employed
to execute surveys with this method. These techniques can
yield essentially equivalent information.
All naturally occurring sulphides of metallic lustre,
some oxides and graphite, give marked induced polarization res
ponses when present in sufficient volume, even when such mater
ials occur in low concentrations and in the form of discrete
non-interconnected particles.
Each rock and soil type exhibits appreciable induced
polarization response, usually confined to a relatively low
amplitude range, which is characteristic of the specific rock
or soil. Certain clays and platey minerals including serpen
tine, sericite and chlorite, sometimes give rise to abnormally
high responses. These effects are attributed largely to so
called "membrane" polarization.
g&oterrex
7.
2. Data Acquired
The field measurements taken were as follows:
i) The applied current, la, flowing through the two
current electrodes during measurement.
ii) The primary voltage, Vp, which exists between the
potential electrodes while the current is flowing.
iii) The apparent chargeability, Ma, which is the I 0 P 0
effect noted for one complete cycle; i.e., for two
current pulses applied in opposite directions.
3. Data Reduction
The apparent chargeability, Ma, in millivoltseconds per
volt is read directly on the I.P 0 receiver,, As mentioned above,
the chargeability is measured for one complete cycle rather
than per single pulse.
From the observations of primary voltage Vp, and the
applied current, la, the apparent resistivity is calculated at
each station as follows:
P- -
ggoterrax
8.
where :
Pa s apparent resistivity in ohm meters
Vp x primary voltage in volts
la ^ applied current in amps
K ~ c onstant dependent on the array geometry
4. loP., Survey Procedure
The induced polarization survey was completed along
picketed lines prepared in advance of the field survey by per
sonnel from Thomas Skimming and Associates. The survey was
conducted along north-south lines spaced at 200 foot intervals;
the lines are numbered O, IE, 2E . . .HE and 1W, 2W . . . 5W
so that the distance of a line from the zero line is not indi
cated by the line number. For example, line 2W, is located
400 feet from the zero line. Along the lines, pickets were
placed and marked at 100 foot intervals.
The survey was completed using the double dipole
electrode configuration and a 100 foot dipole except for the
swampy area in the south-west corner of the grid where a 200
foot dipole was employed for better penetration.
After completing the detailed coverage over the
showing area using the 100 foot dipole (a) and dipole separa
tions na for n^l,2,3 a single spacing of n=3 was selected for
the rapid reconnaissance coverage of the grid east of line O
with subsequent detailing of zones of interest with ns2 and 3.
gioterrex
9.
The 100 foot dipole coverage was completed using the portable
250 watt transmitter; this was possible due to the limited
amount of overburden present coupled with the fact that the
underlying rock types exhibited very high resistivities. To
achieve better penetration in the swamp area in the southwest
corner of the grid a dipole size of 200 feet and n =2 was used
on lines O, 1W and 2W from the base line to the south boundary*,
Details regarding the double dipole electrode config
uration are included in the appendix to this report.
g&oterrex
10,
Vo DATA PRESENTATION
At the choice of Thomas Skimming and Associates the
data is presented as field plots only as opposed to formally
draughted results.
The data presentation consists of apparent charge
ability and apparent resistivity plan maps, standard pseudo
sections, and some profile plots.
In detail the following data accompanies this report:
Plate I - Apparent Chargeability Contour Plan (0=100 ft., ns3
Plate II - Apparent Resistivity Contour Plan (0=100 ft., n=3)
Plate III - Apparent Chargeability Contour Plan (a*100 ft 0 , n^
Pseudo Sections for 0=100, nrl,2,3 for the following lines:
L5W 5N - IS
L4W 8N - IS
L3W 8N - IS
L2W 7N - BL
L1W 9N - IS
LO 9N - US
L6E BL - US
L7E 3N - 9S
L8E 5N - 9S
L10E 6N - 10S
gioterrex
11.
Profile Plots for 0=100, r^l,2,3
LO 9N - US
L1W 9N - 2S
Profile Plots for 0=200, r^(l), 2
LO IN - 9S
L1W BL - 8S
L2W BL - 6S
The plan maps are presented at a scale of l" - 200
feet with a contour interval of 5.0 milliseconds for the appar
ent chargeability plan and a logarithmic interval for the appar
ent resistivity plan.
The prof iles are plotted at a scale of l" B 200 feet,
l" - 10.0 milliseconds and a two inch logarithmic cycle for the
apparent resistivity.
gfioterrex
12.
VI. DISCUSSION OF RESULTS
Generally speaking, the apparent resistivities in
the area covered are high with a large percentage of values
greater than 10,000 ohm meters. Where the resistivities are
of the order of 10,000 ohm meters the soil cover is most likely
very thin; i.e 0 , less than 10 feet in thickness and zones with
apparent resistivities greater than 20,000 ohm meters probably
correlate with outcrop areas. Apparent resistivities of the
range noted in this area are usually related to very silicious
rock types; however, such a correlation is not possible at this
time as no geological information is available to the writer.
The initial test work over the showing area, located
in the northwest corner of the survey grid, was successful in
establishing that the mineralization here does cause anomalous
polarization responses and it was thus possible to map the dis
tribution of mineralization involved in the showing. The well
defined anomalous zone is situated north of the base line and
extends west from line 0; it is possibly open towards the west
off the present grid. The detailed work completed over the(Stt'srtine-t"
showing indicates that two district mineralized bands are in
volved as indicated on Plate III. The north band extends from
about stations 6+50N on line 1W through stations 2+50N on line
5W for a length of at least 800 feet, and the shorter south
band from station 2+50N on line 00 to station 1+50N on line 1W
for a strike length of about 200 feet. Along the axis indicated
on plate III the polarizable material is located very close to
gfioterrex
13.
the surface and probably outcrops for most of the strike length.
The exact position of the mineralized showing is not known to
the writer but it is most probably located along or at least
very close to one or both anomaly axes. The highest concentra
tion of near surface polarizable material in the north zone
appears to be situated at or near station 4+50N on line 4W where
an apparent chargeability of 63 milliseconds was observed for
0=100, 0=1. O n line 1W, there is probably an increase in the
concentration of anomalous material with depth as indicated on
the pseudo section plot of this line. On the south zone, an
apparent chargeability of 52 milliseconds observed at station
2+50N on line 00 for 0=100, n =l s uggests the higher concentra
tion of polarizable material to be situated here in this band.
The amplitude of apparent chargeabilities noted in the showing
area could relate to concentrations of polarizable material of
the order of 5jfc - 6/5 average by volume; in view of the high
resistivity of the host rock,higher concentrations are not very
likely to be the cause of the chargeabilities observed.
Apart from the showing area discussed above, most of
the area surveyed east of line IE is characterized by anomalous
chargeability responses. The region bounded by 800S and 400N,
and line 4E and line HE has very high apparent chargeabilities
in the 40-100 millisecond range generally with correlating high
apparent resistivities of the order of 10,000-20,000 ohm meters,
the latter suggesting very little if any overburden to be pres
ent. This major zone appears to be open towards the east.
QSOtETO
14.
The anomalous area is very complex and consequently
it is difficult to resolve separate zones or individual bands
of concentrations of material which might be involved. The
detailed work completed on lines 6E, 7E , 8E and 10E does indicate
the presence of at least two near surface bands of higher con
centrations of polarizable material as indicated on Plate III.
As much as 10?S coverage by volume is possible in the zone ex
tending from station 4+50S on line 7E through 3+50S on line 8E
and probably to station 2+50S on line 10E. About half this
concentration should be expected in the south zone which appears
to extend from station 8+50S on line 8E to station 6+50S on line
10E.
If the high resistivity area related to this zone
expresses a single geological unit then the mineralization res
ponsible for the above two anomaly axis is likely local concen
trations of the widespread source material. With little or no
overburden being indicated on these two zones of higher concen
tration of polarizable material, an investigation by trenching should be possible.
Because of the complexity of both the showing area and the larger eastern anomalous area it is not possible to
determine the dips of the source material from the geophysical
results alone.
The amplitude of the apparent resistivities observed
in the swamp area using the larger dipole size confirm that
ggoterrex
15.
penetration has been adequately achieved; however, no anomalous
polarization responses were noted here. A rise in the charge
ability profile at the south end of line 1W suggests that polar-
izable material might be situated just south of the grid at this
point .
Respectfully submitted,
P. Norgaard, P. Eng /?Geophysicist
f rt,*C4 t'" *'"*
R. Keith, B. Se. Geophysicist
L.M. Wilson, B.A. Geophysicist
geoterrex
5. SCINTREX IPR8 I.P. RECEIVER
SPECIFICATION SHEET
Input Impedance:
50 or 60 Hz Powerline Rejection
Primary Voltage Range
Accuracy of Vp Measurement
Vs/Vp Range
Vs/Vp Accuracy
Primary SP Buckout Range
Automatic SP Tracking Range
Continuity Meter Reading
Required Stability of Transmitter Timing
Operation Temperature Range
Dimensions
Weight, Complete with Lid and Batteries
Power Supply:
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-30 0 C to *60 0 C-22 0 F to -f!40 0 F
31 cm x 15 cm x 17 cm
3.6 kg
4 D cells - Eveready #1050 or equivalent; estimated battery life 2 months intermittent duty at 25 0 C
1 Alkaline cell Eveready-E91 or equivalent; estimated life l year.
* 50 or 60 Hz depending on local frequency
geoterrex
ELLIOTT GEOPHYSICAL COMPANY
1.5 KW I.P. TRANSMITTER
SPECIFICATIONS:
INPUT POWER
OUTPUT POWER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT IMPEDANCE DRIVE
TIME CYCLE
TEMPERATURE RANGE (AMBIENT)
WEIGHT, COMPLETE WITH CASE
DIMENSIONS, INCASE
120 volt 400 Hz single phase at 1800 VA, relatively insensi tive to input voltage/frequency regulation
1500 watts
200 to 3000 volts in 12 switch selected steps
5 amp. maximum
40 ohms to over 10,000 ohms
On/off periods (symmetrical) adjustable at factory from 0.5 to 10 seconds
-15 0C to *600C (*5 0 F to 1400 F)
45 pounds
10.5 inches high by 16 inches wide by 11*5 inches deep
gROterrex
OUTPUT:
PHASE:
FREQUENCY:
POWER:
ENGINE:
FUEL:
POWER RATING:
STARTER:
ALTERNATOR:
COOLING:
OVERALL DIMENSIONS;
NOMINAL WEIGHT:
1.5 KW I.P. GENERATOR
SPECIFICATION SHEET
Model P-15A
120 volts
single
400 Hz
2 KVA
Briggs d Stratton type 100232
gasoline
4 H.P.
recoil
Alleco Brushless
none
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72 pounds
17 inches 25 inches 18 inches
ggoterrex
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PARAMETERS MEEASURED WITH TIMES OF RECEIVER PROGRAMIN MILLISECONDS.
geoterrex
—LONGITUDINAL SECTION— (EXPLORATION TRENCH)
COPPER LAKE EXPLORATIONS LTD
'•'
Powell Township, Ontario
J 3(0-07) ' ——I7~~II(0-23) y PC-f f 0.03)
(3) Narrow (3 ft. wide) pyritic shear zone i n guartzlte
r*
Quartzite containing appreciable pyrite and quartz stringer development (si l i c l- f i ea t ion)
( 2 ) Ouartz'Jte. moderately mineralized with pyrite and exhibiting weak
{5) Narrow zjojie... (5 f t j wide) of appreciable pyrite and quartz stringer development
(M Quartzite containingminor shale ?nterlayers-
kly mineralized withstringer deve 1 oproejit (s 1 l i c i f i ea t ion)
pyr T te , con f i ned 1 a r gel yto fracture. No appreciables i 1 i c i f i ea t i on
15 30 feet-^^. - J
scale:
LSQEKIP
oLol at***y i. i o*./*1**l*- M/icLVH in
4 /M
THOMAS SKIMMING 6 ASSOCIATES LIMITED
Trench Samp ling
Powell Township Claims
CHOPPER LAKE EXPLORATIONS LTD.
District of Timiskaming, Ontario
August, 1975 j Plan No. C-2
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DATE OF ISSUE
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MINISTRY OF NATURAL RESOURCESSURVEYS AND MAPPING BRANCH
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