EXTECH IV ATHABASCA URANIUM DEPOSIT DATABASE
Geological Survey of Canada, Saskatchewan Industry and Resources, and Alberta Geological Survey


DEPNO COUNTRY LOCATION ALLNAMES COMMODITIES
2317 Canada (Nunavut) 65.42.16 N -- 100.06.29 W GAR 1-30, RAY 1-10, Permit 649; Garry Lake (Pan East Resources); Garry Lake Radioactive Boulder Train; Garry Lake Prospect U; Cu; Mo

Database name: Uranium Deposits, Athabasca Basin
Custodial agency: Geological Survey of Canada
Compilers: Sunil S. Gandhi
Release date: 2007-03-02
   
Deposit name(s): GAR 1-30, RAY 1-10, Permit 649 (claim name); Garry Lake (Pan East Resources) (occurrence name); Garry Lake Radioactive Boulder Train (occurrence name); Garry Lake Prospect (occurrence name)
Political location(s): Canada; Province or state: Nunavut; Nearest community: Baker Lake settlement (260 km 215°)
NTS map data: 066F09
Deposit clan (type): Unconformity-associated
Deposit (sub) types: Unconformity-associated - Proterozoic - fracture-bound; radioactive boulders represent fracture-controlled mineralization in meta-arkose of upper Amer Group, located close to the base of Thelon Formation which is eroded in the source area of the boulders; Reference: Jewett, D. A.; Duncan, D. R., 1983: 1982 Exploration Report, Thelon Uranium Joint Venture, GAR 1-30, Ray 1-10 Claims and Permit 649, Garry Lake Area, Keewatin (081640); Mineral Assessment Report, Kidd Creek Mines Ltd, Indian and Northern Affairs Canada, Publication code 081640
Deposit status: showing; Size category: unknown; Status comments: Distribution of high grade mineralized boulders is indicative of potential undiscovered economic uranium deposits; exploration for them in the claims area is however dormant since 1983
Geologic province: Churchill - Rae Craton
Geologic subprovince: Amer Fold Belt
Geologic district: Northern Thelon Basin
Deposit object located: mineralized boulder field
Commodities: U; Cu; Mo
Mineralization styles: fracture fill (mineralization zone); disseminated (mineralization zone); breccia - matrix (mineralization zone)
Geological ages: Late Paleoproterozoic (host rocks)
Late Paleoproterozoic - Middle Mesoproterozoic (mineralization)
Tectonic setting: epicontinental deformation zone-fold belt; transpressive; Formal name: Amer Fold Belt (country rocks)
continental basin-intracratonic; stable; Formal name: Thelon Basin (country rocks)
Regional tectonic structure: fault (NE-trending boundary zone of granulitic Queen Maude Block, with the claims area in its amphibolitic marginal part, and the Rae Craton to the southeast) Tectonic structure name: Slave-Chantrey Mylonite Zone
Country rocks: (1) gneiss; (layered granitoid gneisses, with minor amphibolite and biotitic paragneiss); Country rock name: Garry Lake Complex; Metamorphic grade: amphibolite - middle
Country rock protoliths:granite-granodiorite (plutonic rocks predominant; include coarse K-feldspar porphyritic granite and tonalite; minor gabbro, mafic volcanics and pelitic sediments); Country rock protolith name: Garry Lake Complex
Individual lithologies:granitic gneiss (layered quartz-feldspar-biotite gneiss, K-feldspar augen gneiss, gneissic granitoids, amphibolitic rocks, biotite schist; intruded by younger plutons)

(2) metasediments; (strata of upper part of the group are exposed in the claims area and are intersected in drill holes; they are folded into a NE-trending open syncline ); Country rock name: Amer Group; Metamorphic grade: amphibolite
Country rock protoliths:arkose-siltstone-mudstone; Country rock protolith name: Amer Group
Metallogenic signatures: U-Cu
Mineralogy: (gangue / mineralization zone): hematite, kaolinite
(mineralization / mineralization zone): pitchblende, pitchblende - botryoidal, pitchblende - sooty, chalcopyrite
Qualified comments: (Applies to: discovery and development) In 1979, Kidd Creek Mines Ltd explored 4 permit areas S of lower Garry Lake on Back River, covering NTS 66F9 NE, SE and 66G12 NW/SW. The 1979 work included geological mapping, prospecting, geochemical lake sediment and water surveys, and airborne spectrometric, magnetic and VLF-EM surveys. Exploration in 1981 included prospecting, geological mapping, geochemical and ground radiometric surveys and airborne magnetic and INPUT EM surveys. A high grade meta-arkose boulder which assayed 22.9 % U led to staking of claims GAR 1-30 and RAY 1-10, and intensive exploration in 1982. The LAK 1-15 claims to the SW were staked in 1983. 1982 work included additional prospecting, airborne and ground geophysical surveys, soil geochemical surveys, Track Etch survey, and diamond drilling of 1038.49 m in 8 holes. Ground work revealed 17 more high grade quartzite and meta-arkose boulders ranging from 0.87 to 25.23 % U; 14 of these, including the 1981 boulder, averaged 6.1 % U. The main concentration of radioactive boulders is found in southern part of GAR-24 claim, and form a 'boulder train' about 3 km long and 0.5 km wide trending 320-330°, located at a drumlin trending 344°. The dominant glacial striation direction is 320°. Six of the high grade boulders occur a few km to the NW in claims RAY 15 and 16, and two to the SW in claims GAR 22 and 23. Two other high grade boulders occur 10 km to the W-SW and two more occur15 km S-SE of the main boulder train outside the claim area. The most significant result of the surface exploration was the location of a Track Etch anomaly about half a km up-ice from the boulder train. Drilling was done prior to delineation of the anomaly, and tested the stratigraphic/EM anomaly targets away from it. Drill holes intersected graphitic phyllites of the Amer Group that are the source of EM anomalies. Pan East Resources Ltd optioned the Garry Lake property in1989 from Falconbridge and Kerr Mines Ltd. All claims lapsed by 1994.

(Applies to: regional stratigraphy) Geological mapping revealed that the permits are underlain mainly by meta-arkose, phyllite and quartzite beds of Paleoproterozoic Amer Group. The overlying Mesoproterozoic Thelon Formation occurs close to the S boundary instead of extending over the permits as indicted by earlier mapping (Wright, 1967). The geological setting of the region of radioactive boulders investigated on this property is favourable for Unconformity-associated uranium deposits as seen in the comparable and coeval Athabasca basin.

(Applies to: mineralization) The boulders at Garry Lake are small, and uranium mineralization in them is fracture-controlled. The host meta-arkose is competent, hence prone to fracturing during folding and brittle faulting undergone by the Amer Group. The a transitional unit between the lower and upper parts of Amer Group, namely the Showing Lake Formation, hosts stratabound disseminations of uranium, molybdenum and copper minerals in rhythmically interbedded feldspathic sandstone and siltstone-mudstone (Young, 1979). The metal concentrations are regarded as synsedimentary or syndiagenetic. This unit probably extends to the Garry Lake region. Folding and faulting of such mineralized strata may have caused local remobilization of uranium to form vein-type concentrations. This may explain the mineralization in the boulders, an alternative to unconformity-associated mineralization. Fracture-filling is also a significant component of the post-Athabasca basement-hosted unconcoformity-related uranium deposits.

(Applies to: rock analysis and sample assays) The following assays on 14 high grade boulders are from Table II of Jewett and Duncan (1983, p.18), and were performed by Bondar-Clegg, Ottawa. The boulder descriptions are abbreviated from Appendix IV of the same report (p.138-163). All the boulders are of meta-arkose, fine grained and a few medium grained. Most of them are less than 10 cm in diameter, more of pebble size than boulders. They range from buff grey to greyish green, with variable intensity of red due to hematite associated with mineralization. Boulder # % U Description GL82-1 5.06 GL82-3 0.98 GL82-4 6.63 GL82-6 9.45 GL82-7 4.02 GL82-8 2.15 GL82-10 0.74 GL82-11 1.13 GL82-12 21.4 GL82-13 1.69 GL82-14 0.91 GL82-18 2.96 GL82-19 4.83 GL81-17* 23.0
Links to other databases: GSC U-Th File (Prasad); Key value: 10325
NUMIN; Key value: 066FNE0001
Geophysical-chemical signature: Signature type: Airborne Radiometrics; Response type: negative (weak)
Signature type: Ground Radiometrics; Response type: positive (moderate)
Signature type: Geochemistry Soil / Till; Response type: positive (moderate)
Signature type: Ground EM; Response type: positive (strong)
Sample data: (1) Sample type: float
References:
Brophy, J. A.; et al, 1983
Northwest Territories EGS 1983-9 (1979)
Government Mining-Exploration Overview, CS Lord Geoscience Centre, Yellowknife, Department of Indian Affairs and Northern Development, Publication code 1979

Brophy, J. A.; Gibbins, W. A.; Laporte, P. J.; Lord, C. C.; Padgham, W. A.; Seaton, J. B. Editor(s)), 1984
Mineral Industry Report 1980/81, Northwest Territories (EGS-1984-5)
Government Mining Exploration Overview, CS Lord Geoscience Centre, Yellowknife, Indian and Northern Affairs Canada, EGS 1984-5, 460 p..

Brophy, J. A.; Crux, J. C.; Gibbins, W. A.; Laporte, P. J.; Lord, C. C.; Padgham, W. A.; Seaton, J. B., 1985
Mineral Industry Report 1982-83, Northwest Territories (EGS 1985-4)
Economic Geology Series Open File Report, CS Lord Geoscience Centre, Yellowknife, Indian and Northern Affairs Canada, Publication code 1985-4, 378 p..

Gall, Q., 1994
The Proterozoic Thelon Paleosol, Northwest Territories, Canada
Precambrian Research, Volume 68, p. 115 - 137

Gandhi, S. S., 1989
Geology and Uranium Potential of the Thelon Basin and Adjacent Basement in Comparison with the Athabasca Basin Region
In Uranium Resources and Geology of North America, Edited by Anonymous, TECDOC, International Atomic Energy Agency, Vienna, International Atomic Energy Agency, Vienna, Austria, 500, 529 p., p. 411 - 428

Gandhi, S. S., 1995
An Overview of the Exploration History and Genesis of Proterozoic Uranium Deposits in the Canadian Shield
Exploration and Research for Atomic Minerals, Department of Atomic Energy, India, Volume 8, p. 1 - 48

Heslop, J. B., 1979
Geological and Geochemical Report on Mineral Permits 613-616, Garry Lake Area, Keewatin (081037)
Mineral Assessment Report, Texasgulf Inc, Indian and Northern Affairs Canada, Publication code 081037

Jewett, D. A.; Zang, M. W., 1982
Geological and Geochemical Report on Prospecting Permits 613 - 616, Garry Lake Area, Keewatin (081468)
Mineral Assessment Report, Kidd Creek Mines Ltd, Indian and Northern Affairs Canada, Publication code 081468

Jewett, D. A.; Duncan, D. R.; Slankis, J. A.; Zang, M. W., 1983
Geophysical Report for the Thelon Uranium Joint Venture, Mineral Claims GAR 21-25 and 1982 Exploration Report for Mineral claims GAR 1-30, RAY 1-10 and Permit 649, Garry Lake Area, Keewatin (081630)
Mineral Assessment Report, Kidd Creek Mines Ltd, Indian and Northern Affairs Canada, Publication code 081630

Jewett, D. A.; Duncan, D. R., 1983
1982 Exploration Report, Thelon Uranium Joint Venture, GAR 1-30, Ray 1-10 Claims and Permit 649, Garry Lake Area, Keewatin (081640)
Mineral Assessment Report, Kidd Creek Mines Ltd, Indian and Northern Affairs Canada, Publication code 081640

Knox, A. W., 1980
The Geology and Uranium Mineralization of the Aphebian Amer Group, Southwest of Amer Lake, District of Keewatin, NWT (1980-AWKNOX)
M.Sc., University of Calgary, 207 p.

Laporte, P. J., 1974
Mineral Industry Report 1969 and 1970, Northwest Territories, East of 104 Degrees West Longitude, Volume 2 (1974-1)
Economic Geology Series, CS Lord Geoscience Centre, Indian and Northern Affairs Canada, Publication code 1974-1, 191 p..

Lord, C.; et al; Gibbins, W. A.; Seaton, J. B.; Goodwin, J. A.; Padgham, W. A., 1983
Northwest Territories EGS 1983-2 (1983-2)
Economic Geology Series Open File Report, CS Lord Geoscience Centre, Yellowknife, Indian and Northern Affairs Canada, Publication code 1983-2

Miller, A. R.; Cumming, G. L.; Krstic, D., 1989
U-Pb, Pb-Pb, and K-Ar Isotopic Study and Petrography of Uraniferous Phosphate-bearing Rocks in the Thelon Formation, Dubawnt Group, Northwest Territories, Canada
Canadian Journal of Earth Sciences, Volume 26, p. 867 - 880

Patterson, J. G., 1986
The Amer Belt: Remnant of an Aphebian Foreland Fold and Thrust Belt
Canadian Journal of Earth Sciences, Volume 23, p. 2012 - 2023

Tella, S.; Thompson, D. L.; James, D., 1984
Geology of Parts of the Deep Rose Lake and Pelly Lake Map Areas, District of Keewatin
Current Research - Geological Survey of Canada, Volume 84-1A, p. 313 - 322

Tella, S., 1984
Geology of the Amer Lake (NTS 66H), Deep Rose Lake (NTS 66G), and Parts of the Pelly Lake (NTS 66F) Map Areas, District of Keewatin, NWT
Open File, Geological Survey of Canada, Publication code 1043, 1 maps.

Tella, S., 1994
Geology, Amer Lake (66H), Deep Rose Lake (66G), and Parts of the Pelly Lake (66F), District of Keewatin, N.W.T. (Colour Digital Map)
Geological Survey of Canada, Open File 2969, Scale 1:250000

Tippett, C. R.; Heywood, W. W., 1978
Stratigraphy and Structure of the Northern Amer Group (Aphebian), Churchill Structural Province, District of Keewatin
Current Research - Geological Survey of Canada, Volume 78-1B, p. 7 - 11

Wright, G. M., 1967
Geology of the Southeastern Barren Grounds (350)
Memoir, Geological Survey of Canada, Geological Survey of Canada, Publication code 350, 91 p., 1 maps.

Young, G. M., 1981
Geology of the Western Part of the Amer Belt, Keewatin (081354)
Mineral Assessment Report, Westmin Resources Ltd; Western Mines Ltd (operator), Indian and Northern Affairs Canada, Publication code 081354


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