apr 'i * i* · 2017-01-17 · and rivers proved invaluable for shoreline geological...

42L15SW0ei2 2.372 TENNANT LAKE 010

APR 'i * i*

SECTION

MELCHETT LAKE PROJECT THUNDER BAY MINING DISTRICT NORTH OF NAKINA, ONTARIO

GEOLOGICAL AND GEOPHYSICAL REPORT

*U. Paltser H. Beckmann

March, 1971

LPart l

J

MELCHETT LAKE PROJECT

THUNDER BAY MINING DISTRICT

NORTH OF NAKINA, ONTARIO

42-L-10,11,14,15

GEOLOGICAL ftHP GEOPHYSICAL REPORT

t

TABLE OF CONTENTS

.CONCLUSIONS AND RECOMMENDATIONS

INTRODUCTION

LOCATION AND ACCESS

REGIONAL GEOLOGY

HISTORY AND ECONOMIC GEOLOGY

GEOLOGY OF CLAIM GROUPS

(i) LITHOLOGY(ii) STRUCTURE

(lil) NASS LAKE - GROUP I(iv) LAKE KAPIKOTONGWA - GROUP II(v) LITTLE NASS LAKE GROUP III

GEOCHEMICAL SURVEY

DISCUSSION OF GEOLOGICAL RESULTS

DISCUSSION OF GEOPHYSICAL RESULTS (by H. Beckmann)

PAGE NO.

2

3

3

4

4

5

557

' 8

9

10

11

13

4L 2545

GROUP 1W

G 4349-1,2,3E 4344M 4343GC 2549-1

-2-3

GROUP IE

G 4349 -4,5E 3329E 3346M 3330

GROUP 1NE

E 2551M 2552

GROUP 2

G 4346E 3328M 3347

GROUP 3

G 3333E 2543E 2547M 2542GC 2550-1

-2-3

Note:

LIST OF ILLUSTRATIONS

Location Map

Geological MapElectromagnetic surveyMagnetometer surveyCu. Soil SamplingPb. Soil SamplingZn. Soil Samplimg

--

Geological MapElectromagnetic surveyHorizontal Loop E. M. SurveyMagnetometer survey

Electromagnetic SurveyMagnetometer survey

Geological MapElectromagnetic surveyMagnetometer survey

Geological MapElectromagnetic surveyHorizontal Loop E. M. surveyMagnetometer surveyCu. Soil SamplingPb. Soil Sampling

. Zn. Soil Sampling

1-2545 Group 1W St IE are in part 1

1 NE Group 2, Group 3 are in part 2

1" - 2 miles

1" s 200'1" - 400'1" a 400'1" * 400 '1" ** 400'1" B 400'

1" s 200'1" e 400'1" ** 400'1" - 400'

1" * 400'1" s 400'

1" s 200'1" - 400'1" B 400'

1" e 200'1" B 400'1" B 400'1" = 400'1" s 400'1" s 400'1" s 400 '

APPEND1CIES

PAGE

APPENDIX I

APPENDIX II

CLAIM NUMBERS AND DISTRIBUTION

REFERENCE MAPS AND REPORTS

APPENDIX III ASSAY RESULTS

APPENDIX IV

APPENDIX V

APPENDIX VI

COMPILATION OF ASSESSMENT WORK ON FILE AT O.D.M.

MODEL SE 600 ELECTROMAGNETIC UNIT

FLUXGATE MAGNETOMETER MF l (SCINTREX)

17

18

19

20

22

23


THUNDER BAY MINING DISTRICT

42-L-10,11,14,15

GEOLOGICAL AND GEOPHYSICAL REPORT

SUMMARY

Beginning in May 1969, airborne E.M. conductorsystems were ground checked by .geological mapping and geophysical surveys^ Additional horizontal loop E.M. and geochemical soil sampling was carried out on unexposed conductors.

Detailed geological mapping over the grid systemon the three groups revealed that the rocks are well metamorphosed schists and gneisses associated with Barrovian (regional) type metamorphism. Conductors coincided with magnetite iron formation that occasionally contained pyrite. Assays returned negligible ( .0^) base metal content. On the whole, the geology differs from O.D.M. P.565 in that no large band of rhyolite tuffs or its metamorphic equivalent exists. Based on the rock types, the environment is metasedimentary and holds little possibility for Noranda type base metal deposits.

Group I

A corre]ation exists between the highly magnetic conductors and the iron formation. Anomalous geochemical soil values over unexposed conductors are highly suspect since they came exclusively from the organic horizon.

Group II

The conductors remain unexplained but evidence indicates they have been drilled previously. No drill core or results are available. Granite gneiss is exposed south of the conductor and probably underlies a great deal of the claim group.

Group III

No explanation of the conductor was found by geo logical mapping (ie. unexposed). Results from the soil sampling are uninspiring. Outcrop, limited as it is, indicates an un favourable geological environment.

PACE.

CONCLUSION

The area holds very little further interest since most conductors are explained and the geological environment is unfavourable.

RECOMMENDATIONS

No further work is advisable and the majority of claims allowed to lapse. In consideration of the anomalous geo chemical values on Group I a small number of claims can be re tained to cover the area of interest. Sufficient work has been done to fulfill requirements.

RIO TlriTO CANADIAN EXPLORATION LIMITED

PAGE.

INTRODUCTION

During the summer of 1969 the Ontario Department of Mines embarked on "Operation Fort nope" a mapping project covering the Melchett Lake area. The extensive navigable lakes and rivers proved invaluable for shoreline geological investigation When this means of coverage was inadequate, traverses at two mile intervals were necessary. A result of the project was the pre paration of preliminary map P. 565.

Rio Canex's interest in the area began in thewinter of 1969 when it was thought to be an area worthy of more work. Subsequently, an airborne survey was flown by Seigel Associates Limited. The Report on Airborne Geophysical Survey Melchett Lake Area, Ontario submittled in early 1970, contained the recommendations of Messrs. Klein and Campbell and a list of favourable anomalies.

Acting on these recommendations Rio Canex staked three claim groups totalling 110 claims as follows: group I - 62 ^laims at Nass Lake, ,qroup II - 30 claims S.W. of Lake Kapikotongwa, 'group III - 18 claims north of Little Nass Lake. Detailed lists of the claims appear in Appendix I. This phase of the project was contracted to Jean Alix Ltd. and completed in the spring of 1970.

geophysical and wasbegun in late May following break-up. The initial base camp was at Nass Lake from which geological mapping and geophysics was completed on group I West. Group II and III were next the object of geological and geophysical investigation. On completion of this work, base camp was moved to group I East and remained there until the end of the project.

The geophysical work and results are described by H. Beckmann in a separate section of this report.

A geochemical survey was completed ori portions of groups I West and III in late August with the intention of ex plaining unexposed conductors. Results of the geology and geo chemistry have been compiled as maps accompanying the report.

LOCATION AND ACCESS

The Melchett Lake claim groups are located 40 miles NNW of Nakina, a small town east of Lake Nipigon.


PACE.

Claim groups I and II are accessible by a gravel road from Nakina to the Anaconda installation on Melchett Lake 35 miles north of Nakina. The remainder of the trip can be made by boat or canoe and involves several short portages past rapids.

Group III is less accessible requiring air trans portation which can be obtained in Nakina from Superior or Austin Airways.

REGIONAL GEOLOGY

The regional geology consists of an east-west trending band of metasediments and metavolcanics that bulge to a width of nearly 10 miles at Melchett Lake. This metamorphosed complex pinches out to the east and west after attaining a length of 35 miles. The surrounding geology consists of granites and migmatites of acid intrusive origin.

From O.D.M. map 2102, Tashota-Geraldton Sheet and verification during mapping, the meta-sedimentary units exhibit steep northerly dips and a prefered east-west strike. However, north of Bury Lake, the dip is steep to the south which deviates from the general trend. Consequently, the Melchett Lake area may represent a tight fold whose southern limb is relatively intact but whose northern limb has been removed by erosion. Additional deformation during granitic intrusion has distorted the sequence producing a re-folding of the iron formation south of Melchett Lake.

In the preliminary O.D.M. Map P. 565, Makokibatan- Melchett Lakes Sheet a significant addition was made, namely the introduction of a rhyolitic unit that contradicts previous work. It was on this more recent information that the area was considered favourable for ore emplacement.

However, the new O.D.M. map proved to be over simplified as detailed mapping progressed.

HISTORY AND ECONOMIC GEOLOGY

The Kowkash-Ogoki area was once the site of active gold exploration and at one time supported several small scale gold operations.

To date, the main activity has been Anaconda's iron property east of Melchett Lake considered as a possible mine be fore the Labrador discoveries. Magnetite in banded iron formation

RIO TINTO CANADIAN EXPLORATION LIMITED

PAGE.

Iwould have been beneficiated at the mine site before being shipped by rail to Lake ports. Considerable expense in drilling and constructing installations occurred before it proved uncompetitive with the new Labrador finds.

The exploration for base metals has been restricted to the Lake Kapikotongwa-Little Nass Lake area where Cu, Zn, Pb mineralization was found by prospectors. Chimo Gold Mines, Nakina Gold Mines and United States Smelting and Refining have carried out geophysical, geological and drilling operations with varying degrees of success. Significant mineralization was found in several drill holes the lengths and assay results have been com piled in the appendicies. In the Bury Lake area covered by our geological reconnaissance, drill core and picket lines were discovered indicating that it had also undergone investigation. Unfortunately no records of the companies involved in or results were found in the assessment records.

The Melchett Lake metamorphosed rocks have thus undergone exploration for precious metals, iron and base metals and, with the exception of iron, there has been no potentially economic ore bodies discovered.

GEOLOGY OF THE CLAIM GROUPS

(i) LITHOLOGY

The rocks of the area have undergone regional dynamothermal metamorphism corresponding to the almandine- amphibolite facies. As a result of this intense process, original textures and features have largely been destroyed. Lithification, recrystallization and pressure forces imprinted volcanics and sediments with metamorphic characteristics. Only the chemical composition reflected by the mineralogy can aid in re-creating the pre-metamorphic geology.

From theory and observation the mineral assemblages correspond favourably to the highest temperature subfacies; the sillimanite-almandine-orthoclase. Theoretical considerations hypothesize a temperature range of 650O C and pressures of 8 and 9 Kbars.

(ii) STRUCTURE

Mappable rock units have a prefered east-weststrike and a northerly dip. Some variation exists in the magnitude of the dips but they are characteristicaly moderate to steep. (500 - 900 ).

RIO TltiTO CANADIAN EXPLORATION LIMITED

PACE

fKi'ieifLiKi

after H.G.F. Winkler, " Petrogenesis of Metamorphic Rocks "

RIO TltfTO CANADIAN EXPLORATION LIMITED

PAGE

L p Iron formations provide suitable markers since they

are continuous, narrow and can be traced by magnetic data in areas with no outcrop. On this criteria and lithologic boundaries, one fault zone running north-south exists between lines 140W and 144W on group I.

A major linear exists on group I sheet 2W marked by a steep sided valley with trends WNW-ESE.

Outcrops on groups II and III were not sufficient to reveal structure in any detail, however, fragmentary data conforms with the regional trend.

(iii) GROUP I (MASS LAKE) Dwg G 4349-1-5

Geological exposure was quite abundant in the area allowing mappable units to be traced over considerable distances. .Some portions were swampy or covered bv heavy over burden supporting huge spruce and poplar

1. Diabase

A post-metamorphic diabase dyke cutting across the regional foliation is found on map sheet 5E. It is typically fine grained, dark coloured with chilled margins.

2. Gabbro

Gabbro represents a coarse grained intrusive of mafic mineral constituents with minor disseminated pyrite in some outcrops. The rock is massive, jointed and weathers to reddish-brown colour. Epidote mineralization occurs in one out crop confined to the interstices of the mafic minerals. This unit is conformable with metamorphics suggesting a sill structure rather than an a circular intrusion.

3a. Amphibolite - Garnet Amphibolite

These two rock types are very similar and were differentiated during mapping just to examine their distribution.

The unit is coarse grained dark green-blackamphibole (hornblende) composing a schistose foliation. Large reddish-pink garnet porphyroblasts are present in the garnet amphibolite but absent in the amphibolite. Varying amounts of feldspar are present but the quantity is low.


PAGE.8

Medium grade metamorphism has erased all evidence of the original texture but on the basis of composition they are characteristic of basic rocks.

3b. Garnet - Amphibolite (Conglomerate)

The unit represents a transitional type composed I of garnet - amphibolite with stretched lensoid shaped felsic l fragments. Near the garnet - amphibolite unit, felsic fragments' make up a minority of the rock but as the distance from 3a in creases the lenses become continuous bands eventually forming a hornblende - feldspar gneiss with minor biotite, garnets and quartz.

4. Hornblende - Feldspar Gneiss

This unit is closely related to biotite - feldspar schist but represents a reduced amount of biotite and hence schis tosity. Some outcrops appear to be silicified containing horn blende prisms, garnet porphyroblasts and the fine grained appearance of rhyolite when broken. They are limited in extent and are adjacent to rocks of sedimentary origin.

5. Iron Formation

The iron Formation consists of medium grainedmagnetite with quartz which is either massive or medium grained and banded. Pyrite is disseminated in some iron formations but forms a distinct 2 ft. wide band on Dwg. ( G 4349 - 4)

The conductors coincide with these iron formations but assay results from them were discouraging.

Weathering forms a rusty limonitic surface that permeates the rock and makes fresh samples difficult to obtain. The rock is quite magnetic and can be traced by magnetic data and typically produces a strong conductor.

(iv) GROUP II (LAKE KAPIKOTONGWA) Efwg G-4346

Group II is located on the south shore of LakeKapikotongwa in the far western corner. Physiography is variable on the grid but generally covered by glacial debris and muskeg.

Outcrop exposure does not appear in sufficient, quantity to explain the conductive zones but does give an idea of geological environment. Previous drilling is suggested by a campsite and drill hose at baseline 4W but there are no results in assessment work files. ____________________.


PACE,

1. Metasediments

The mineral constituents include white feldspar, some quartz and amphibole. Biotite varies in amount, where it is plentiful the rock is schistose, grey with a buff weathered surface. In outcrops with predominately feldspar, the rock has a gneissic appearance with bands alternating light and dark minerals l" wide.

The mineralogy suggests a sedimentary origin, either an argillaceous arkose or greywacke.

2. Gabbro

One outcrop of this type was found In the areabut magnetic results indicate a north-south trend along the grid. The rock is massive, coarse grained, weakly jointed and contains an abundance of dark minerals (pyroxene and amphiboles) and feldspar. Weathering forms a weakly rusty surface.

3. Granite

Migmatite, a more accurate name, would suggest some metamorphic characteristics that occur within the rock. Basically, the minerals are a hypidiomorphic aggregate of feldspar and quartz with subhedral books of dark biotite. Weak, randomly oriented plastic deformation seems to have taken place during intrusion or succeeding metamorphism.

Outcrops west and south of the grid were investigated and found to be more foliated and biotite rich.

(v) GROUP III (LITTLE HAS S LAKE) Dwg G-3333

The grid for group III was cut on a airborneEM conductor approximately 3000 feet north of Little Nass Lake. Relief is very low, sloping away from the south-east to the north west with much of the grid covered by cedar swamp and muskeg.

Ver exposure made geological ex planation of the conductor impossible. The nearest outcrop is feldspar-biotite schist with small red garnets, a metamorphosed sediment. Heavy overburden and flat topography gave no opportunity for trenching or stripping away cover.

1. Biotite Feldspar Schist

This unit predominates in the claim group but it is


PAGE.10

mmcorl sup

confined to such a small area that its true extent must be supposition at this stage. Fundamentally, the rock consists of fine to medium grained schistose biotite and feldspar, in which small red garnet porphyroblasts, hornblende prisms or quartz can occur. Weathered surfaces vary from buff to grey and have a massive appearance Fresh samples exhibit fine banding and a strong schistosity developed by the dark biotite between which is a feldspar - quartz aggregate that contains garnet. Small quartz veins cut across the schistosity on one outcrop but generally quartz is concentrated in discontinuous stringers.

2. .Amphibolite

Only one large outcrop of amphibolite was foundin the extreme south-east. This consisted of predominately dark green-black prismatic amphibole (hornblende) producing a schistose texture interspersed with large (h" dia. ) reddish-pink garnets. Bands of light weathering finer grained feldspar 3" wide are found conformable with the schistosity of the amphibole. The weathered surface is dark coloured with the more resistant garnets standing out on the surface. Considering the mineralogy, the amphibolite represents a basic rock either a gabbro intrusive, andesite flow or a sediment rich in ferromagnesian minerals.

GEOCHEMICAL SURVEY

A geochemical survey was carried out over con ductors on groups I and III not exposed on surface, in the hopes of providing further information. Although the value of geochemistry is regarded with much apprehension in glaciated areas it is useful if interpreted as a positive test only. That is, the absence of a geochemical anomaly does not necessarily signify lack of mineralization but the presence of one indicates a favourable area providing it is not a product of transportation.

The soil sampling, conducted by D. Freckelton and J. Gray covered part of Group I West just east of Nass Lake to test parallel conductors and Group III in its entirety. Difficulty was encountered because of the nature of the soils necessitating the sampling of the organic horizon in swampy areas.

of Rio Algom.Samples were analvzed^at^the^LLLiQt Lake laboratory Procedure in the laboratory consisted of

1. Ashing the samples at 1600OF for 8 hours.2. Dissolving in HC1 and HNC*3 taking to dryness.with3. Made to volume in 10?6 HCl/volume and read by Atomic

Absorption for copper, zinc and lead.


11PACE

this report.

RESULTS

Results have been complied on maps accompanying

Group I West Dwg GC 2549-1-3

The values for all three elements are not anomalous on lines SOW to 52W where the best control was achieved in the uniformity of the sample. Geochemical anomalous values are pre sent at L72W 5S and CM-SON; L68W ON and IS; L64 ON, 3N, 4N for all the elements. These samples are from the organic section of the "A" horizon and at or near the swampy boundary. Therefore it can be expected that metallic ion will be concentrated where different chemical (ph) conditions exist. This anomaly formed by drainage of higher ground is "seepage" causing the accumulation of metal ions in the swamp environment. Uniformily high values should exist at all other swamp-high ground interfaces. From the results. organic soils in the swamp have higher values but abnormal values still exist at close proximity to the geophysical conductors.

Group III Dwg GC 2550-1-3. The geochemicalsurvey provided no anomalous values near the conductor. Coverage was poor in the northwest swamp but overall results are uniformily very low.

DISCUSSION OF GEOLOGICAL RESULTS

The detailed mapping failed to confirm the existence of siliceous rhyolite tuffs. Instead, the rock typoe at* 0 fnfiinlv^ metasedimentarv schisjts— and. gneJ-S-S-e-S^of cTrevwacJ^fi—Composition thatcontain several discrete horizons of iron formation. These iron formations are composed of fine grained magnetite interbanded with layers of quartz. Outcrops of iron formation are essentially barren of sulphides with the exception of minor pyrite. Samples of this pyritic rock contained negligible base metal values. Typically , the iron formation coincides, with high magnetic readings associated with the conductor. Therefore, it must be concluded that iron formation is responsible for conduction. Hence there is no encouragement to continue work in the area.

The rhythmic nature of the iron formations,rock types and uniformity of structure suggests a geosynclinal environment subject to periods of depositional activity or quiescence depending on orogenic activity of the source area. The presence of minerals associated with high-grade metamorphism creates a distinct possibility the sediments experienced high


12PAGE.

temperature and pressure conditions associated with basal sections of a geosynclinal pile. During the course of deformation, sill- like bodies of gabbro were intruded that now are conformable to the regional structure. Typically, they are coarse, grained massive and show no contamination by surrounding rock. The origin of the amphibolites is a matter of conjecture? some authors suggest a dual origin (ie. derived either from igneous or sedimentary rocks.) Considering the analgous chemical composition and reported pillow structures (none observed on property), the amphibolite may indeed represent a metavolcanic rock. On this premise, the geology of the Melchett Lake area is composed of rock types indicating a sedimentary-volcanic sequence but with no rhyolite members.

Toronto, Ontario March, 1971 U. Paltser


13

DISCUSSION OF GEOPHYSICAL RESULTS

Numerous conductor systems were detected by a helicopter- borne electromagnetic and magnetic survey carried out in early 1970 in the Melchett Lake area of Northern Ontario. The selection of conductor systems for geophysical ground follow-up was directed primarily by their geological setting as deduced from the Ontario Department of Mines preliminary geological map No. P 565 Makokibatan Melchett Lakes Sheet.

System l, 8, 10, 14, 15 and 16 were considered prime targets and at least partially staked, while system 11 and 12, directly correlating with an exceptional strong magnetic anomaly were left for reconnaissance investigations.

Line cutting, .geophysical surveys and geological mapping were started in jjud-Mayand carried on during the month of June July, 1970,. ThegeopTTysical survey results are reported in se quence with.the systems selected.

SYSTEM l

A minor multiple airborne conductor system was selected since it appeared to be associated with a circular magnetic anomaly, Only minor conduction was detected by the ground follow-up electro magnetic survey indicating two parallel conductive zones with minor direct magnetic correlation. A cross-cutting dyke, which gives rise to a positive magnetic anomaly, might have been the factor that gave this anomaly the circular shape. Claim Group II covers conductor system l and the data is illustrated on drawings E-3328 and M-3347.

SYSTEM 8

The electromagnetic survey traced this conductor over a strike length of 4,800 feet from line 12 west to 36 east and it remains open on both ends. Excellent conductivity was detected in the central portion of this system from line 12 east to 24 east with deflection of up to 55O p.p. by the detail vertical loop survey. Magnetic correlation is direct positive up to 1000 gammas.

Conductor system 8 is located in a low, swampy area devoid of outcrops and in order to gather additional information, horizon tal loop EM was run over 4 lines indicating good conductivity with a ratio of 2 over l, in phase over quadrature. Two minor parallel conductors are indicated in the eastern part of the line grid and south of the main zone. These also have direct magnetic correlation of 100 gammas positive.

PACE14

Claims covering this system are designated the No. Ill Group and the data us presented on drawings M-2542, E-2543 and E-2547.

SYSTEM 10

Located on claim block "Group I West". Conductor 10 is short, showing good conductivity on 4 lines only, namely, on line 144 west to 156 west where it terminates. The magnetometer survey places this conductor along a minor dipole high-low flank.

Drawing M-4343 and E-4344 include the data obtained over system 10.

SYSTEM 11

It was proposed to test system 11 on "Open Ground" and stake only if found of further interest. Six reconnaissance EM lines located the system and indicated excellent conductivity with strong, positive but narrow magnetic correlation which was found to coincide with barren iron formation.

E-4344.The survey results are a part of Drawings M-4343 and

SYSTEM 12

This system was also selected for reconnaissance follow- up. It was traced over a grid 3,600 feet long, returned excellent conductivity, however, the electromagnetic data indicates a grad ual plunge to the west of a relatively narrow zone (iron formation)

A minor conductive zone with minor magnetic correlation was detected some 500 feet north of system 12 and running parallel. The data is presented in drawings E-2551 and M-2552.

SYSTEM 14t

Conductor 14 was traced geophysically over a strikelength if 3,000 from line 40 east to 72 east, illustrated on drawings E-3329, M-3330 and E-3346. It coincides with an iron formation that was traced geologically for miles.

The conductivity displayed, varies from medium to strong, indicating a shallow narrow zone. Magnetic correlation is direct but varies from high positive to negative. The investigated portion of system 14 is located on claim group I East.

RIO TlrtfO CANADIAN EXPLORATION LIMITED

PAGE,15

ISYSTEM 15

Conductor system 15 was traced over a strike length of 6,800 feet on the I West claim block from line 52 west to 120 West and also on claim group I East, covering a strike length of 7,200 feet from line O to line 72 east. Conductivity is good to excellent with direct magnetic correlation.

This conductor system runs through low, swampy ground, but wherever outcrop was observed the conductive zone correlates quite well with detected iron formations or the contact of biotite feldspar schist and amphibolites.

The data for system 15 is on drawings M-4343, E-4344, E-3329, M-3330 and E-3346.

SYSTEM 16

System 16 was also traced over a considerable length. On the eastern portion on claim group I East and is illustrated on drawing E-3329, M-330 and E-3346. Conductivity is medium to good indicating a deep-seated conductor with the exception of an area between lines 32 east and 40 east. This is the most con ductive part of the system and the only portion where direct magnetic correlation is indicated. No outcrops were found in the vicinity of the conductor but it is interpreted to run along a contact of biotite feldspar schist and amphibolites. Continuation of conductor system 16 can be traced on the airborne survey westwards and it was surveyed again on lines 72 west to 52 west then running through Nass Lake and picked up again along the shore on lines 108 to 124 West. Conductivity is of medium strength but with stronger positive magnetic correlation on the No. I West claim block, as illustrated on drawings M-4343 and E-4344.

CONDUCTORS A,B,C,D,E,F,G,H,I,J,K,L, AND M

Several conductors were indicated by the ground follow-up survey, but not detected by the airborne survey. Of these only conductor F and M are considered of interest, all others are only minor with no magnetic correlation and approach overburden effects.

CONDUCTOR F

Illustrated on drawing E-3329, conduction is indicated from line 44 east to line 64 east. It is parallel and some 500 feet south of System 15.


PACE16

. Horizontal loop EM data shows good conductivity on lines 40 and 44 east only (E-3346) with negative magnetic correlation (M-330).

This anomaly has not been fully explained.

CONDUCTOR M

Also a short (one line) anomaly that was detected on the horizontal loop electromagnetic survey only. Conductor M, located on line 20 E at 17 -i- 000 south, displays good conductivity of 40% in-phase with 80 quadrature, a very good ratio and direct magnetic positive correlation of 2,000 gammas.

Conductor M is parallel to and north of system 16.

H. BeckmannToronto, Ontario March, 1971


17

APPENDIX I

CLAIM NUMBERS AND DISTRIBUTION

Group I248126 - 248161 248181 - 248206

362662

Group II248162 - 248180 248225 - 248235

191130

Group III 248207 - 248224 18

Total 110

PAGE.18

APPENDIX II

REFERENCE MAPS AND REPORTS

1. Ontario Department of Mines Annual Report, 1931 Vol. XL, Part 4, Map 40F, Kowkash Ogoki Area

2. Map 2102 Tashota - Geraldton Sheet, 1966

3. Prelim. Map P. 565 Makokibatan-Melchett Lakes Sheet, 1969

4. Aeromagnetic Series: 980G981G 990G 991G


PAGE.19

APPENIDX III

ASSAY RESULTS

Sample No.

C-21234

C-21235

C-21236

C-21237

C-21238

Location

28W, 40N

44W, 36N

52W, 16N

76W, 16N

22+50E, 24N

.009

.007

.004

.004

.008

.001

.004

.0007

.004

.003

Au

tr

tr

tr

N.D,

N.D,


APPENDIX IV

COMPILATION OF ASSESSMENT WORK

ON FILE AT O.D.M.

Reports

Drill Results

63-2322 Chimo Gold Mines63-2352 Nakina Gold Mines63-2359 Chimo Gold Mines63-2390 Chimo Gold Mines63A-374 Aldor Exploration63A-538 Chimo Gold Mines63E-15 Nakina Gold Mines

8-5-211 Little Long Lac G.M. Lun-Ker Prospect 8-1-212 " " " " " " "

All assessment work filed with the exception of 63A-374 is concerned with the copper, lead, zinc showings stretching in an east-west band south of Little Nass Lake. Reports 63-2322, -2352, -2359, -2390 deal with geophysics and magnetometer surveys which discovered no conductors on the properties.

Reports 63A-538 and 64E-15 are confined to geology and contain assay values of the showings.

Aldor Exploration in their report describe geology and results from surveys south-east of Nass Lake. Not compiled in the appendix are the reports by Anaconda American Brass whose interests are considerably south of Rio Tinto's Nass Lake property.

RIO TIN'TO CANADIAN EXPLORATION LIMITED

PAOE 21

800' to SW corw

OB-l

8-2

8-3

0-4 6-5

Au/o*.o101*t M.Insm iw/6I.9

tosrr

IOQ.O167.1

jta.a.m.i1213.

/21.2

/Of.O

115.6 I36.Z

Jt.l lOQJD ffO.O

K4.6

corV.f

tot.i1/23II7.ZUl.2

m t.1210

2.0

6.4 2.1

4.6 *.37.6

2At. sac/

X.OI.If.Os.of.O

f.O

1,9

.11

.01 .01

7r.

Tr. Tr.

Tf.

ofli aTr.

hi!

.02

.62

Tf.Tr.

Tr.

—— J— 2.6?

I.IO 1.11

Tr. Tr.Tr.

.BOsoys c

Tr.

~-Tr.

Tr..SO

TT-Tr.

/.ztI.U 3.33

.6,1 /.6S

•37X. f}

t

——.tff•*f/.tf7.•f?

^.46

DRILL RESULTS LUN-KERR PROSPECT 8-1-2I2 8-5-2II


22

APPENDIX V

GEOPHYSICAL SURVEYS


The SE 600 is a moving source electromagnetic unit

capable of measuring In-Phase and Out-of-Phase components .at- coil

separations up to 300 feet.

is with theReadings are recorded"""" ^ ^ ^*^ *^*"

reference point midway between the two coils.

A typical anomaly due to a sub-surface,conductor will

consist of a decrease in the In-Phase reading and a negative Out-of-

Phase reading. .

As a horizontal loop unit, both coils are moved along a

line, preferably cut across the strike of the formation. Penetration

is approximately one half of the coil separation.

A simple conversion enables the operator to employ the

SE 600 as a vertical loop unit. With this method the receiver and

transmitter can be run (a) in line (b) on parallel lines 400 feet

apart and (c) with the transmitter stationary and the receiver moving

on adjacent lines and up to 800 feet away. This increases the depth

penetration considerably. Readings are recorded in degrees of de-,

flection and interpretation is comparable to other vertical loop units.

The SE 600 is battery powered and operates on 1600 cps.

Horizontal loop data are plotted in per cent (y*) In-Phase

and Out-of-Phase signal while the vertical loop results are plotted

in degree ( o ) of deflection resulting in crossovers*over electro

magnetic conduction.

PACE 23

APPENDIX VI

GEOPHYSICAL SURVEYS.

FLUXGATE MAGNETOMETER MF l (SCINTRF.X)

The MF l Fluxgate Magnetometer is a hand held instrument.

It is orientation independent, measures the vertical component of the earths magnetic field directly in gammas over a range of ^ 1000 to 1000.000 gammas with an accuracy of feet*-'**- **"*n' jffi,

Readings are taken and recorded from a top mounted meter after levelling the magnetometer.

Periodic checks are made to base stations for diurnal drift.

Corrections for drift and day. to day changes have been applied to the presented data.

RIO TltJTO CANADIAN EXPLORATION LIMITED

bet

MELCHETT LAKE PROJECT THUNDER BAY MINING DISTRICT NORTH OF NAKINA, ONTARIO

42-L-10,ll,14,15 GEOLOGICAL AND GEOPHYSICAL REPORT

U. Paltser H. Beckmann

Part 2L

March, 1971

J

PAGE .

APPENDIX

GEOPHYSICAL SURVEYS

FLUXGATE MAGNETOMETER MF l fSCINTREXl

The MF l Fluxgate Magnetometer is a hand held instrument.

It is orientation independent, measures the vertical component of the earths magnetic field directly in gammas over a range of * 1000 to 1 00 O f 00 O gammas with an accuracy of better than

Readings are taken and recorded from a top mounted meter after levelling the magnetometer.

Periodic checks are made to base stations for diurnal drift.

Corrections for drift and day to day changes have been applied to the presented data.

mo nriro CANADIAN EXPLORATION LIMITED

APPENDIX

GEOPHYSICAL SURVEYS


The SE 600 is a moving source electromagnetic unit

capable of measuring In-Phase and Out-of-Phase components at coil

separations up to 300 feet.

Readings are recorded at 100-foot stations with the

reference point midway between the two coils.

A typical anomaly due to a sub-surface conductor will

consist of a decrease in the In-Phase reading and a negative Out-of-

Phase reading.

As a horizontal loop unit, both coils are moved along a

line, preferably cut across the strike of the formation. Penetration

is approximately one half of the coil separation.

A simple conversion enables the operator to employ the

SE 600 as a vertical loop unit. With this method the receiver and

transmitter can be run (a) in line (b) on parallel lines 400 feet

apart and (c) with the transmitter stationary and the receiver moving

on adjacent lines and up to 800 feet away. This increases the depth

penetration considerably. Readings are recorded in degrees of de

flection and interpretation is comparable to other vertical loop units,

The SE 600 is battery powered and operates on 1600 cps.

Horizontal loop data are plotted in per cent (04) In-Phase

and Out-of-Phase signal while the vertical loop results are plotted

in degree ( o ) of deflection resulting in crossovers over electro

magnetic conduction.

ULO PALTSER

PARTICULARS;

Qualif ica tions;

B.Se. (Eng.), Geological Engineering 1970 Queen's University at Kingston, Ontario.

Experience;

1968 - Student geophysical assistant, Oba, Ontario for International Nickel Company Limited.

1969 - Student geological assistant, Noranda, Quebec for Anaconda American Brass Limited.

1970 - Geologist - Rio Tinto Canadian Exploration Limited.

Party Chief on Melchett Lake, Ontario project.Party Chief on Waddy-Windrum Lake, Saskatchewanproject.Drilling supervisor on Estrees Twp., Quebecproject.

:kwMarch 11, 1971,

Ulo Paltser

PERFORMANCE

ASSESSMENT WORK DETAILS

Township or Area,

Type of Survey—

Z 42L15SW0812 Z. 372 TENNANT LAKE 900

A separate form is required for each type of survey

Chief Line Cutter or Contractor

rate

Name

Party 7

Consultant.

/y "

Address

Name

Address

COVERING DATES

Line Cutting————.

FieldInstrument work, geological mapping, sampling etc. '

Office.

INSTRUMENT DATA

Make, Model and Type.

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 .

C*

CREDITS REQUESTED

Geological Survey

Geophysical Survey

Geochemical Survey

DATE

20 DAYS 40 DAYS Includes per claim (Line cutting)

D

l—i ShowCheck ^

/Z, /77/7SIGNED

.(rw

TOTAL

Send in duplicate to:FRED W. MATTHEWS SUPERVISOR-PROJECTS SECTION DEPARTMENT OF MINES fe 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.

,- . '.. ' ' . A, ' ,,A

If, in the opinion of the Minister, a ground geophysical survey nieets the requirements prescribed for such a survey,1 including: , \ -,\ y\\ ,, i

(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 -, * - l

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 7the requirements for submission of geological surveys for maximum credits will qualify fot 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 averag'e 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.

A-V

lPERFORMANCE Se COVERAGE CREDITS


Township or Area

Type of Survey—A separate form is retired for each type of survey

Chief Line Cutter _____J . f/t/Un/Sf^^^_______ or Contractor ^Name

Party Chief.7 ' " Name

Address

Consultant—-——^-^^^—————————.^-—Name

Address

COVERING DATES

Line Cutting

Field___L.17

Instrument work, geological mapping, sampling etc. '

Office.

INSTRUMENT DATA

Make, Model and Type.

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

CREDITS REQUESTED

Geological Survey

Geophysical Survey

Geochemical Survey

DATE

20 DAYS per claim

n

D

D

Includes jne cutting)

Show Check •J

r SIGNED

MINING CLAIMS TRAVERSED List numerically

8I

TOTAL

Send in duplicate to:FRED W. MATTHEWS SUPERVISOR-PROJECTS SECTION DEPARTMENT OF MINES fc NORTHERN AFFAIRS WHITNEY BLOCK QUEEN'S PARK TORONTO, ONTARIO

Performance and covWagc credits do not apply to airborne surveys


AS ASSESSMENT WORK


If, in the opinion of the Minister, a ground geophysical survey jneets the requirements prescribed for such a survey, including: ,


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. ' " ,


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 f or-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 highdr credits may be allowed under the provisions of subsections 8 and 9 of section 84 of the Mining Act.


PERFORMANCE fc COVERAGE CREDITS

fcwnshipTownship or Area

Type of Survey

Chief Line Cutter or Contractor

Party Chief.


/P /Ust/utA^

A separate form is required fl5r ~each~ type of survey

Name

Address

Address

Consultant.Name

Address

COVERING DATES

Line Cutting^^.^^.

FieldInstrument work, geological mapping, sampling etc.

Office.

INSTRUMENT DATA

Make, Model and Type. O

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 —a* Jyi.

Number of Miles of Line cut Within Claim Group———————

Number of Samples Collected Within Claim Group _______

CREDITS REQUESTED

Geological Survey

Geophysical Survey Is

Geochemical Survey

20 DAYS per claim

40 DAYS Includes per claim (Line cutting)

D

n n

Show Check

DATE li,/ ?/SIGNED

MINING CLAIMS TRAVERSED List numerically \

2IMJ....

nx TO-I4o-r (-7-1-2.• ••(••••••••••t*!*****.*****..*....*.!*******!**.***.*.....

n \5*5(o

TOTAL

.a

Send in duplicate to:FRED W. MATTHEWS SUPERVISOR-PROJECTS SECTION DEPARTMENT OF MINES fc NORTHERN AFFAIRS WHITNEY BLOCK QUEEN'S PARK TORONTO, ONTARIO

Performance and coverage credits do not apply to airborne surveys


AS ASSESSMENT WORK


If, in the opinion of the Minister, a ground geophysical survey meets the requirements prescribed for such a survey, including: , \ *


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.


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.


200

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DATE OF ISSUE

OCT131971

OMT. DEPT. OF MINES AND NORTHERN AFFAIRS^

NATIONAL TOPOGRAPHIC SERIES 42 L

PLAN NO. M. 1649

ONTARIODEPARTMENT OF MINES

AND NORTHERN AFFAIRS

42L15SWC012 2.372 TENNANT LAKE 210

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Terrier Lake Area ( M-1938 )42L15SYil0ei2 2.372 TENNANT LAKE 220 506864

AREA OF

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THUNDER BAY MINING DIVISION

SCALE: l-INCH 1=40 CHAINS

LEGEND

PATENTED LAND

CROWN LAND SALELEASES

LOCATED LAND

LICENSE OF OCCUPATIONMINING RIGHTS ONLY

SURFACE RIGHTS ONLY

ROADSIMPROVED ROADS

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CANCELLED

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NOTES

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i

DATE OF ISSUE

JAN 2 51971

ONT. OEPT. OF MWES AND KORTHtRN AFFAIRS

NATIONAL TOPOGRAPHIC SERIES

PLAN NO. M. 2534

ONTARIODEPARTMENT OF MINE

AND NORTHERN AFFAIR

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248214

NO OUTCROP

248210 248209

cg.ga

boni lers?

2482H

cg.go.f.b

L -4E L -8E L -I2E L - I6E L - 20E L -24E L -28E L -32E L -36E

248218 248213 248212 248207

/i mz

LEGEND

Feldspar, Biotite Schist

Amphibolite

42L155W0012 2.372 TENNANT LAKE 450

eg Coarse groinedmg Medium groined

f g Fine groinedga Garnet*

1 OuortZosef Felsicb Bonding

O

Outcrop

Swamp

Claim pott

Schistosity, Gneissosity

Geologic boundary(assuroed)

Claim Line

N.T.S 42-L-15

SCALEzoo o zoo

i ii i nil mf"400 600

i'Till 1 ifeoo

On* Inch — 200 Feet


MELCHETT LAKE PROJECT ONTARIO

GROUP No. 3

GEOLOGICAL MAPT

JUNE 1970. UP DWG- G - 3333

42LI5SW0012 2.372 TENNANT LAKE

rt

2-

LEGENU:

i

Conductor Axis


Sample Location

Swamp

Stream

Cu Values in p.p.m

NTS

4? L - lp.lt> W.I5

400iri

SC AIE400 ace 130

One inch — 4CO

BASE LINE


MELCHETT LAKE PRO JECT - ONTARIO

SOIL SAMPLING — GROUP No. 3

COPPER

JUNL D.F. / DWG.GC-2550-l

4aL15SW0812 2.372 TENNANT LAKE

LEGEND

20

. Conductor Axis

. Transmitter Location

Sample Location

Swamp

Stream

Zn Values in p p m.

NTS 4?- L - I

4COSC At 6

4UO 120 .

One Inch — 400

RIO TINTO CANADIAN EXPIORATION ITD,


SOIL SAMPLING — GROUP No. 3

ZINC

JUNE I&70 D. F. DWG.GC-2550-2

TENNANT LAKE 480

LEGEND

AX

Conductor Axis


Sample Location

Swamp

Stream

Pb Values in p.p.m.

NTS

4? - L -10,11, 14. IS

2 One Inch = 40C



SOIL SAMPLING — GROUP No.

LEAD

JUNl DF DWG.GC-2550-3

apr 'i * i* · 2017-01-17 · and rivers proved invaluable for shoreline geological...

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