archer, cathro

42
ARCHER, CATHRO AND ASSOCIATES LTD. CONSULTING GEOLOGICAL ENGINEERS Box 4 127. WHITEHORSE Y.T. 667-44 15 BENTALL CENTRE, VANCOUYER. B.C. 688-2568 685 TWO BENTALL CENTRE 555 BURRARD ST. VANCOUVER 1. B.C. Report On 1973 Diamond Dri lling Program Carmacks Coal Teslin Exploration Ltd. Yukon Territorial Coal Licenses 15 NE Quarter - NTS 1151/1 16 East Half of NW Quarter - NTS 1151/1 17 SE Quarter - NTS 1151/1 M.P. Phillips November, 1973 ---L-.IY- --. ._- .- .._ .. I - - .. . This report has bacn oxsnined; ae- clarcd acceptable as Reprcren:atim Work urldsr Secticn 32 and Schedule 0 of the Caimch Mining Rsy~fations and valued in thc amauni of 5 1% fi

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Page 1: ARCHER, CATHRO

ARCHER, CATHRO AND ASSOCIATES LTD.

CONSULTING GEOLOGICAL ENGINEERS

Box 4 127. WHITEHORSE Y.T. 667-44 1 5 BENTALL CENTRE, VANCOUYER. B.C. 688-2568 I.

685 TWO BENTALL CENTRE 555 BURRARD ST.

VANCOUVER 1. B.C.

Report On

1973 Diamond D r i l l i n g Program

Carmacks Coal

Tesl in Exploration Ltd.

Yukon T e r r i t o r i a l Coal Licenses

15 NE Quarter - NTS 1151/1 16 East Half of NW Quarter - NTS 1151/1

17 SE Quarter - NTS 1151/1

M.P. Ph i l l i p s November, 1973

---L-.IY- --. ._- .- .._ .. I - - .. .

This report has bacn oxsnined; ae-

clarcd acceptable as Reprcren:atim Work urldsr Secticn 32 and Schedule 0 of the Caimch Mining Rsy~fations

and valued in thc amauni of 5 1% fi

Page 2: ARCHER, CATHRO

TABLE OF CONTENTS

Summary and Conclusions ...................................... 1

Property ................................................. 2

Location and Access, ..'.....,.................................. 2

Topography ................................................... 3

History ................................................... 3

Geology Regional ................................................ 4 Coal Licenses ........................................... 4

Core Logging and Sampling .................................... 6

Coal Analysis .............................................. 6

Diamond Dr i l l ing .............................................. 7

Road Construction ............................................ 7

Geophysical test^......^,..,...................,............ 8

Appendix

Table 1 - Results of Coal Analysis - Bir t ley Engineering(Canada ) Ltd., Calgary, Alberta

Diamond Dfill Hole Logs 73-1, 73-2, 73-3

I 1 lus t ra t ions

Figure 1 - Plan Showing Location , Scale 1:1,000,000 - following page 1

Figure 2 - Plan Showing Location of D r i l l Holes , Scale 1:50,000 - i n pocket

Figure 3 - Cross Section DDH 73-1 - i n pocket

Figure 4 - Cross Section DM 73-2 6 3 - i n pocket

Page 3: ARCHER, CATHRO

SUMMARY AND RECOMMENDATIONS

During the period October 21 t o 25, 1973, Tesl in Explorations Ltd.

constructed one mile of access road and d r i l l e d three core holes t o t a l l i n g

517 f e e t on Coal Licenses 15 and 17 i n the Carmacks area, Yukon.

License 15 - Two holes (262 and 15 f t . ) cut west dipping beds of the

Tantalus Formation t h a t contain par t ings and narrow bands of coal.

License 17 - Two core holes on License 17, one i n 1971 and one i n

1973, confirmed the presence of a ten foo t th ick seam (Tes l i n Seam)

of coking-quality coal i n the Laberge Ser ies sediments, about 115

f ee t below the base of the Tantalus Formation.

I f the economics of coal i n the Carmacks a rea appear favourable, a

geological trenching and diamond d r i l l i n g program should be conducted t o

prove the continuity and qua l i ty of the coking coal seam. In preparation

f o r t h i s , two coal mining leases should be staked north of Leases 2955

and 2956 i n Licenses 15 and 16, and four leases should be staked south and

e a s t of Leases 2949 and 2954 i n License 17, o r shown on Figure 2 i n the

pocket.

INTRODUCTION

The 1973 program w a s primarily aimed a t resampling the coal seam

intersected with poor recovery i n 1971 Hole 71-2 on License 17. This

seam was analyzed by the Fuel Research Centre, Mines Branch, Ottawa, which

described it as a high-ash coking coal which might be su i t ab l e f o r the

Japanese market if it could be su i tab ly cleaned. Dr i l l ing on License 15

i n 1973 was of an exploratory and geological nature, The program was supervised

Page 4: ARCHER, CATHRO
Page 5: ARCHER, CATHRO

- 2-

by M. P. Phi l l ips of Archer, Cathro & Associates Ltd., Whitehorse.

PROPERTY

Teslin Exploration Ltd. holds three Ter r i to r i a l Coal Licenses within

NTS map sheet 1151/1 i n the Carmacks area, central Yukon. They were issued

on September 2, 1970 and form a contiguous block comprising about 175

square miles, within which are several old coal leases awned by Anvil Mining

Corp. Ltd. The Teslin Licenses a re 15 (northeast quarter), 16 (east ha l f

of northwest quarter) and 17 (southeast quarter).

LOCATION AND ACCESS

Carmacks l i e s 100 miles north of Whitehorse, the terminus of the 120

mile narrow-gauge White Pass and Yukon Route railway from the port of

Skagway, Alaska. The extension of the railhead t o Carmacks has been discussed

a t recent meetings between White Pass and the Yukon Ter r i to r i a l Government

and it is rumoured tha t this extension may take place within the next f ive

years.

The Klondike Highway, an a l l weather gravel road from Whitehorse to

Dawson, para l le l s the western boundary of License 17 through Carmacks and

crosses License 16. The first twenty miles of th i s road has been paved

i n the past two years and pavement is scheduled t o reach Carmacks by

1978. The a l l weather gravel Campbell Highway s t a r t s a t Carmacks and

passes through the northern pa r t of License 17. A 5000 foot gravel

a i r s t r i p is s i tua ted three miles eas t of Carmacks on the Campbell Highway. The

Page 6: ARCHER, CATHRO

- 3-

Whitehorse-Faro power line,which supplies Anvil Mining Corporation crosses

License 17,

Access fo r the d r i l l i n g on License 15 is provided by a good one mile

bush road which leaves the Klondike Highway a t M. P. 107.7 , about four miles

north of Carmacks . License 16 is crossed by the Klondike Highway and access

t o the Five Fingers Mines area is provided by a 3.5 mile road constructed

by Teslin i n 1971. I n 1966, Anvil Mining Corporation cons t m c t e d an access

road from M.P. 100.5 on the Klondike Highway to coal leases south of Carmacks.

Teslin extended t h i s road 4000 f ee t during 1971. This road is only

passable by four wheel dr ive vehicles during freeze-up.

TOPOGRAPHY

These l icenses l i e within the Yukon Plateau . Relief is moderate,

consist ing of ro l l ing h i l l s and broad f l a t valleys. Elevations vary from

1700 t o 3000 f ee t , Glacial till covers large areas. Deep ravines and creeks

have i n places cut through the g lac ia l till and exposed bedrock. Permafrost

conditions e x i s t below spruce and pine covered, north-facing slopes . South facing slopes a r e usually covered by grass and aspen groves.

HISTORY

Dr. G.M. Dawson of the Geological Survey of Canada made the f i r s t

report of coal occurrences i n the Five Fingers and Carmacks area i n 1887.

Coal was produced from the Five Fingers and Tantalus Mines around the

"turnof the century f o r use on riverboats. The longest coal mining operation

has been a t the Tantalus Butte Mine which has produced from 1923 t o 1967

and from 1969 t o the present. Coal was supplied during t h i s period t o

Carmacks, Dawson and United Keno H i l l Mines a t Elsa. In 1969 the mine was

re-opened t o supply coal t o Anvil Mine where it is used for p lan t heating

and concentrate drying.

Page 7: ARCHER, CATHRO

In December, 1965, Anvil staked coal mining leases around the Tantalus

and Tantalus Butte Mines and acquired leased ground near the Five Fingers

. Mine. From 1966 t o 1968, Anvil constructed access roads and car r ied out

a trenching and d r i l l i n g program, and topographic surveys on the leases

south of Carmacks.

In 1971, Tesl in constructed a 3.5 mile road t o a point 4000 f ee t south

of t he Five Fingers Mine where a 188 foo t core hole was d r i l l e d on License 16,

On License 17, a 3/4 mile extension t o the Anvil access road permitted

the d r i l l i n g of a 310 foo t core hole. Details of t h i s work i s covered

i n a repor t by J . F . Hlavay , P.Eng. 1971.

In 1972 a reconnaissance photogeological map covering t he three l icense

areas was prepared by Tesl in Ewlorat ions Ltd.

G EO LOGY

Regional

Coal occurrencesin the Carmacks area occur i n c l a s t i c un i t s within

the Jurassic-Lower Cretaceous Laberge Ser ies and Tantalus Formation.

The Laberge Ser ies comprises a l te rna t ing sandstone and shale with narrow

conglomerate beds and is overlain disconformably by Tantalus Formation

conglomerates with subordinate sands tone and shale , The beds have been

folded i n t o tight,northwest trending synclines and an t ic l ines . Both un i t s a r e

intruded and overlain by volcanic rocks of the M t . Nansen and Carmacks

Series. Glacial and a l l u v i a l cover is extensive, resu l t ing if porn exposure

of coal bear ing rock, This fac tor has inh ib i ted coal exploration and

development.

Page 8: ARCHER, CATHRO

- 5-

of the Tesl in holes on leases owned by Anvil Mining Corporation. A s teeply

e a s t dipping, north t o northwest trending, 30 foo t th ick coal seam has been

exposed by trenching i n Tantalus Formation. This seam may be a southern

extension of the Tantalus Mine seam. Reflectance t e s t s by Dr . P.A. Hacquebard of

thecoal Section,Geological Survey of Canadashave shown t h a t the Tantalus

Mines seam and the Tantalus Butte seam are the same.

Hole 71-2, d r i l l e d t o the e a s t a t a dip of 60' was s i t e d on the bas i s

of airphoto in te rpre ta t ion t o cut beds on the e a s t limb of a t i g h t l y folded

syncline. Hole 73-1 was d r i l l e d beside Hole 71-2 (same dip and direct ion) and

intersected the base of the Tantalus Formation and upper beds of the

Laberge Series. Four coal seams less than 1.0 f e e t th ick and a 10 4 4 foo t

coal seam (Teslin Seam) interbedded with mudstone was cu t i n t h i s hole.

The following s t r a t i g r aph ic un i t s were recognized:

Laberge Ser ies

Sandstone - Dark grey i n color, generally very f i n e grained, r a r e

subordinate medium grained;massive t o f i ne ly bedded with

occasional black mudstone part ings.

S i l t s t one - Black t o dark grey; massive; ra re ly f ine ly interbedded

with black mudstone and f i n e grained sandstone.

Mudstone - Black; massive; sometimes s l i g h t l y s i l t y with carbonaceous

shale and br igh t shiny coal part ings and narrow lenses.

Coal - - The upper p a r t of the coal seams a r e interbedded par t ings

and lenses of carbonaceous shale, mudstone and coal,

gradually changing t o a b r igh t shiny coal. 5

The Tesl in seam is 10.4 f e e t thick and consqts of a lower

4.1 foo t coal band overlain by black mudstone with numerous

part ings, narrow lenses and bands of coal.

Page 9: ARCHER, CATHRO

Tantalus Formation

Conglomerate - Well packed; subangular t o subrounded pebbles of black

chert , white quartz and greenish qua r t z i t e up t o one

inch i n diameter i n a g r i t matrix of the same composition.

License 15

The c loses t bedrock exposure is Tantalus Formation g r i t which outcrops

about 2000 f e e t south of Hole 73-2. Bedding s t r i k e s north and dips steeply

east . Hole 73-1 was d r i l l e d t o the west t o cut the bedding but in te rsec ted

beds dipping pa ra l l e l t o the d r i l l hole. Hole 73-3 was d r i l l e d t o determine

the bedding a t t i t ude . The holes cut conglomerate, g r i t , sandstone, s i l t s t o n e

and mudstone of the Tantalus Fomxation and in t rus ive andesite. Coal partings

and lenses up t o 0.3 f e e t wide a re present i n a l l the sediments.

CORE LOGGING AND SAMPLING

A l l core was transported t o Whitehorse by truck where it was logged,

sampled and s tored a t the Core Library of the Yukon Resident Geologist,

Dept. of Indian Affairs and Northern Development. Logs f o r the holes ,

a re included i n the Appendix of t h i s report . Whole core sampling was carr ied

out only on the Teslin Seam i n Hole 73-1 and samples were s en t t o Bir t ley

Engineering (Canada) Ltd. of Calgary, Alberta f o r analysis. Details of the

sampling is as follaws:

Sample No. From - Length (f t) Recovery (f t ) Des cr ip t ion

A369 166.1 171.9 5.8 5.3 coal, muds tone 171,9 172.4 0.5 not sampled s i l t s t o n e

3 70 172.4 176.5 4.1 2.8 coal

COAL ANALYSIS

Results of Bir t ley Engineering's analysis a re shown i n Table 1 at the end

of t h i s report and a re discussed i n a separate report by Birt ley,

Page 10: ARCHER, CATHRO

DIAMOND DRILLING

Drill contractor was E. Caron Diamond Dr i l l ing of Whitehorse; which

supplied a Longyear 38 wirel ine d r i l l machine and anc i l l a ry equipment t o

d r i l l HQ (2.5 inch diameter) core holes. A D6 bulldozer was used t o move

the d r i l l . Coring charges were $9.75 per foot. Other work was charged

a t f i e l d cost . The d r i l l crew were lodged a t the Carmacks Hotel. The only

ser ious delay was i n Hole 73-2 when caving behind the core ba r r e l a t the

bottom of the hole resul ted i n the d r i l l rods separating from the core

barre l . Water was supplied t o the d r i l l from lakes near the d r i l l s i t e s .

A d r i l l i n g mud solut ion and various addi t ives was used as a c i rcu la t ion

medium. Core recovery varied from 98 t o 100 per cent and was s l i g h t l y

lower i n the s o f t coal and muds tone bands. The use of d r i l l i n g mud, large

core diameter , f i v e foo t core ba r r e l and experienced d r i l l e r s were responsible

f o r the excel lent core recovery. An ac id t e s t a t the bottom of Hole 73-1

shared t h a t the ho3e dip remained constant. No delays dere encountered

by mechanical breakdarns t o the d r i l l machine. Total d r i l l i n g cost including

mobilization and demobilization of equipment and lodging f o r the d r i l l e r s

was $24.60 per foo t t o d r i l l 517 f ee t .

ROAD CONSTRUCTION

In September 1973,A. Wheeler of Carmacks constructed a one mile road

from mile 107.7 on the Klondike Highway, using a D 8 bulldozer with blade

and ripper, t o provide access t o License 15.

Cleared brush and t r ee s were buried with d i r t as requested by the Yukon

Forest Service.

Page 11: ARCHER, CATHRO

GEOPHYSICAL TESTS

Induced Polarization(1,P.) Survey

On September 5, 1973, T.R.B. Dundas of Kenting Earth Sciences Limited,

Calgary, accompanied by the wri ter , carr ied out a t e s t I , P. survey across

the coal seams a t the Tantalus Butte and Tantalus Mines. Results of the

survey indicate t h a t the coal seams do not give a detectable I .P . response.

Detail of the survey a r e given i n a report by T.R.B. Dundas dated September,

1973.

Electromagnetic (EM 16) Survey

On October 27, the wr i t e r a s s i s t ed Steve Presunka i n conducting a

t e s t EM 16 survey.across two recent ly trenched coal seams located approximately

one mile north of the Tantalus Butte Mine and another t e s t l i n e across the

Tantalus Mine Seam. EM 16 measures the secondary f i e l d s s e t up when s igna ls

f r o m VLF submarine communications s t a t i ons meet conductive bodies.

Results of these t e s t s indicate t h a t the Carmacks coal seams have a higher

conductivity than the surrounding rocks and give detectable anomalies.

Conductivity t e s t s carr ied out i n Whitehorse on individual lumps of coal

showed t h a t t he coal was not conductive. Residual moisture must have been

l o s t when the lump of coal was exposed t o room temperature.

Respectfully submitted,

ARCHER, CATHRO & ASSOCIATES LTD.

p.1. Phi l l ips

Page 12: ARCHER, CATHRO

A REPORT TO TESLIN EXPLORATION LTD.

ON THE ANALYSES OF COAL FROM THE

CAR4AC KS AREA, W KON TERR IROTY

Prepared By

Dr. D . F . Symonds, P . Eng.

Coal Science and filinerals Testing Division

November 21st, 1973

Page 13: ARCHER, CATHRO

Subsidiary of Great West Steel Industries Ltd.

A REPORT TO T E S L I N EXPLORATION LTD. ON THE AYALYSES OF COAL FROM THE

CARbLX KS AREA, W KON TERRITORY November 21, 1973

1. IKTRODUCT ION

Two coa l samples, l abe l led A-00369 and A-00370 of approximately

10 l b s . each were received i n polyethylene bags from t h e Carmacks Area.

They were a i r d r ied and then analysed as shown i n Figure 1. It should

be noted t h a t a composite sample of t h e f l o a t s a t 1.50 S.G. (+28 mesh)

and t h e f r o t h concentrates (-28 mesh) was s en t t o t h e Fuels Research

Centre, Department Energy, blines and Resources, Ottawa f o r petrographic

analysis .

The r e s u l t s of t h e laboratory ana lys i s a r e shown on Tables 1

and 2.

Page 14: ARCHER, CATHRO

2. DISCUSSION OF RESULTS

The raw ash contents of the samples were high, p a r t i c u l a r l y f o r

sample A-00369 (69.6 a i r d r ied ba s i s ) . I t was not iceable , however,

t h a t both samples possessed agglomerating p r ~ p e r t i e s ~ e v e n a t t he high

ash contents (an F. S. I. of 7 a t an ash content of 30.4% is unusual).

Sink-float and f r o t h f l o t a t i o n t e s t s were c a r r i e d ou t on t h e

samples t o determine i f t h e elevated ash contents were due t o pure

rock mixed with t h e coal o r high inherent ash q u a l i t i e s . The tests

showed t h a t t h e samples were compsed of both high inheren t ash

contents and l a rge proportions of r e j e c t mater ia l .

The coal samples exh ib i t i ed exce l len t swel l ing p rope r t i e s

(F.S.I. values of 8 and 8% were encountered on t h e c lean coa l f rac t ions )

Even t he t a i l i n g s from sample 370 had an F.S. I. of 6% a t an ash content

We es t imate t he rank of t he coal as ASTM High Vo la t i l e A.

3. SUmirnY

After t h i s very preliminary examination, t h e ind ica t ions a r e

t h e t t he samples possess good swell ing c h a r a c t e r i s t i c s , but a l s o have

high inherent ash contents.

Page 15: ARCHER, CATHRO

FLOKSHEET FOR THE AhlALYSIS OF .............................

Figure 1

A I R DRIED SMIPLE

CRUSHED TO -1/4" SQ.

I

I SAiilPLE DRY - I

I I EXTRACTIOR OF RAY SAhlPLE 1 I

1 / 4 " x 28 Mesh

ANALY SED FOR ASH F . S. I. 4

r

SINK-FLOAT ANALYSIS AT

1.50 S.G.

SINK ' FLOAT PRODUCTS

WEIGHED AND ANALYSED

FOR ASH 6 F . S . I .

I

SCREENED AT 28 MESH TYLER

AND FRACTIONS WEIGHED

I F l o a t s @ 1 . 5 0 S.G.

P -28 Mesh r

i

FROTH FLOTATION ANALYSIS

PERFOMIED AT 10% PULP

DENSITY, WITH REAGEhT

DOSAGE OF 0 . 4 8 i b / t o n

KEROSENE/FIIBC, 4 / 1

COND ITIONIXG T IEIE : 1 $1 IN .

I FOR PETROGRAPHIC ANALYSIS 1

I

L * CO3IPOSITE SAMPLE

F r o t h Conc.

SENT TO DEPT. E . bl. &R, OTTAWA __* 4

Page 16: ARCHER, CATHRO

TESLIN EXPLORATION

A-00370

RAW ANALYSIS

Ash %

30.4

SIZE ANALYSIS

Size Fraction W t %

RM %

1.0

Ash %

33.2

21.2

SINK-FLGAT ANALYSIS: 1/4" x 28M

S. G. Fraction Wt % - Ash %

-1.50 42.3 13.7

FROTH FLOTATION: 28M x 0

Vbl % FC % - - 26.8 41.8

Cum W t ' %

76.5

100.0

Cum W t %

Table 1

November 2nd, 1973

F.S. I.

Cum Ash % F.S. I.

33.2 6%

30.4 7%

Cwn Ash % F.S.I.

Reagent Dosage - - 0.48 lb/ton, Kerosene:MIBC 4: 1

F. F. Fract ion Wt % Ash % CumWt% CumAsh% F.S.I.

Conc . 65.1 13.1 65.1 13.1 8% , Ta i l s 34.9 37.0 100.0 21.4 6%

* Conc. is f r o t h co l lec ted i n 1 1/2 minutes a f t e r 1 minute conditioning.

Page 17: ARCHER, CATHRO

SIZE AiiALYSIS

Ash %

Size Fraction \l't % Ash %

1/4" x 28M 89.0 73.8

28M x 0 11.0 37.6

SINK-FLOAT ANALYSIS: 1/4" x 28bl .

S. G . Fract ion Wt % - Ash %

-1.50 6.5 14.3

Table 2

November 2nd, 1973

Cum K t %

89.0

100.0

Cum W t %

6.5

100.0

Cum Ash % F . S . I .

CumAsh% F . S . I .

73.0 N.A.

FROTH FLOTATIOX: 28M x 0

Reagent Dosage - - 0.48 lb/ton, Kerosene:FIIBC 4: l

F. F. Fraction W t % Ash % C u m W t % CumAsh% F.S .I .

Conc. 49.7 18.0 49.7 18.0 8

Ta i l s 50. 3 58.8 100.0 38.5 1 l

* Conc. i s f r o t h col lected i n .l 1 /2 minutes a f t e r 1 ~ i n u t e conditioning.

Page 18: ARCHER, CATHRO

REPORT O N A N INDUCED POLARIZATION TEST SURVEY

OVER COAL IN .THE

YUKON TERRITORY FOR

ARJAY KiRKER RESOURCES LTD, BY

T. R. B. Dundas, M. Sc.

Page 19: ARCHER, CATHRO

REPORT O N

A N INDUCED POLARIZATION TEST SURVEY

OVER COAL

IN THE

YUKON TERRITORY

FOR

ARJAY KIRKER RESOURCES LTD.

KENTI N G EXPLORATION SERVICES LIMITED

CALGARY, ALBERTA

SEPT. 1973

Page 20: ARCHER, CATHRO

I NTRODUCTION

General

SURVEY SPECIFICAT

l nstrume~

TABLE OF CONTENTS

Page

ONS

tation

Calculations

Electrode Array

RESULTS

l NTERPRETATION

CONCLUSIONS AND RECOMMENDATIONS

ACCOMPANYING MAPS LOCATED

Fig. 1 - Location Map Fig. 2 - Apparent Chageability Contour Map Fig. 3 - Apparent Resistivity Contour Map

In Report In Pocket In Pocket

Page 21: ARCHER, CATHRO
Page 22: ARCHER, CATHRO

Genera I

This report describes the results of an Induced Polarization ( I . P.) Test

Survey carried out by Kenting Exploration Services Limited, over Coal Seams in the

Yukon Territory for Arjay Kirker Resources Ltd.

'The f ield work was carried out on September 4th and 5th, 1973 by T.R.B.

Dundas, Senior Geophysicist i n two different areas.

The first area was i n the Nordenskiold Coa! Area, Territorial Licence No.

10 where Line 0 was surveyed.

The selected sites i n the second area at Carmacks were inaccessable and

test work was carried out over Coal Seams at the Anvil Coal Mine and at a coal exposure

on the Bank of the Yukon River in Carmacks.

Page 23: ARCHER, CATHRO

SURVEY SPECIFICATIONS

A. lnduced Polarization Survey

Instrumentation

The equipment used for the lnduced Polarization survey consisted of a Huntec Mark

I l l pulse-type system.

The Huntec Mark II I Receiver presents digital ly the primary voltage, Vp, and four (4)

individual values (MI, M2, MJ and M4) of the decay curve i n a single reading. Additional points

on the decay curve may be obtained by changing the instrument parameters. The decoy curve may

be used to distinquish electromagnetic effects from the true ind"ced Polarization volkqe.

The fol lowinq specifications apply:-

Current - D.C.

Transrni tter Power Available

l nteqratinq Tine

Delay Time from "current off" to start of integration

- 2.0 seconds "current on1) 2.0 seconds "current off" A 1 terna te pulses have reversed polarity

- 30 mil 1 iseconds

Time from "currenk off" to centre of each integrated charqeabil ity:-

4 - 45 milliseconds

M2 - 90 rn i l l isxonds

M3 - 180 milliseconds

M4 - 360 m i l I iseconds

- 30 milliseconds

percentaqe of primary vol taqe,

Page 24: ARCHER, CATHRO

Calculations

The apparent resistivity is calculated by dividinq the primary voltacje, Vp,

by the current Iq flowinq between the current electrodes, C1 and C;! , and muftipl yinq by

a qeometrical factor appropriate to the electrode array beinq used. The apparent resistivity

is expressed in ohm-meters.

Electrode Array

The electrode array used was the qradient arranqement.

In this system the current electrodes C1 and $ a r e placed a larqe distance

apart compared t o the potential electrode separation Q - 9 . T h e current electrode separation C1 - C2 was approximately 700 fee t with a

q - f$ distance of 25 feet. Readings were taken a t station intervals of 25 f ee t alonq the

survey l i nes.

Page 25: ARCHER, CATHRO

RESULTS

The results are presented i n the form of profiles of both apparent resistivity

and apparent chargeability at a scale of 1 inch = 50 feet, (Fiqures 1, 2).

Page 26: ARCHER, CATHRO

A. Nordenskiold Coal Area Fiqure 1.

The Cairnes coal seam i s located af station 0 and is approximately 32

feet wide. There i s no indication of any major ~ h a r ~ e a b i l i t y response correspondinq

to this location or any chanqe i n the decay rate as shown by the four chaqeabil i ty curves.

There i s a local increase i n the apparent resistivity but this i s similar to values over other

rock types on this l ine and could not therefore be used to determine the location of the

main seam usinq the l nduced Polarization method.

B. Carmacks Area Fiqure 2.

This line crossed four coal seams at the Anvil coal mine. The sandstones

and conqlomerates qive hiqher values than over the locations where coal was expected.

Readinqs were also taken over a coal exposure on the bank of the Yukon

River i n Carmacks confirminq that the coals in this area aive relatively low values compared

to the other rocks in the area.

There are no obvious differences in the decay rate alonq this profile.

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CONCLUSIONS AND RECOMMENDATIONS

The test work i n the area has shown that there is very l i t t le response

over the coal seams i n contrast to what i s expected in the foothills area.

The Induced Polarization method would be of l i t t le value to locate

coals of similar quality i n the Yukon area,

Respectfully submitted,

KENTING EXPLORATION SERVICES LIMITED

T. R. B. Dundas, M.Sc. Senior Geophysicist

J.E. Wyder, Ph.D., P.Eng., Chief Geophysicist

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h . , . ;- . ' - ' - ~m ,NO . 2- '

DRl LL HOLE LOG FAGE i OF

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b. .. . HOLE No. 3, OR1 LL HOLE LOG PAGE 2 OF 4

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L , . . . HOLE NO. \ DRl LL HOLE LOG PAGE 3 OF 4

JESL /N EXPLORATION L TC? CARMACKS AREA

WORDifdATES CORE SIZE

ELEVATION HOLE STARTED

DIP HOLE COMPLETED

A Z I M U ~ H . LOGGED BY a

kL E 1.3 Ink t 10. Oft. COAl LICENCF NO. LABEUE SERIES

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r, - . HULL No. L

DRl LL HOLE LOG PAGE OF

CARMACKS AREA COORDINATES CORE SIZE b'-Q

- ELEVATION HOLE STARTED m o s ~e z\; 1473

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F . ,,. A- --. DRl LL HOLE LOG PAGE 2 OF

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L . . . HOLE NO. jl - DRl LL HOLE LOG PAGE J OF

TESL /N EXPLORAT/ON L 72). CARMACKS AREA

COORDINATES CORE SIZE -- ELEVATION HOLE STARTED

DIP HOLE COMPLETED AZ l MU1 H LOGGED BY

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I W S L .-. DRILL HOLE LOG PAGE 4. OF

TESL /N EXPLORAT/ON L7Z2 CARMCKS AREA

COORDINATES CORE SIZE HOLE STARTED , - ELEVATION HOLE COMPLETED D I P I

LOGGED BY

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L . . Hurt' FIO . 2 - DRILL HOLE LOG PAGE s OF 5

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i . .

CARMACKS AREA I

COORDINATES CORE SIZE t-4 Q

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