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Occurrence Details


Occurrence Number
116B 132
Occurrence Name
Blackstone
Occurrence Type
Hard-rock
Status
Prospect


General Information

Secondary Commodities: antimony, copper, silver, lead, gold
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 64.537220 N, -138.534440 W
NTS Mapsheet(s): 116B10
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Staked as the Tak cl 1-48 (YA52870) in Jul/80 by Mattagami Lake Exploration Ltd based on anomalous results from regional geochemical stream sediment sampling. The company carried out additional geochemical rock and silt sampling, detailed geological mapping and propsecting in 1981 and 1982.
Mattagami's assets were later acquired by Noranda Exploration Company Ltd, which carried out geochemical soil sampling, geophysical test surveying and drilled 3 holes (50 m) before staking Tak cl 49-52 (YA79129) to the west in Jul/83. In 1994, Noranda carried out additional geochemical soil sampling, VLF-EM surveying, hand trenching and drilled 3 holes (223.7 m).
Restaked as Tak cl 1-10 (YC03717) by Canadian United Minerals Inc in Feb/97, which carried out prospecting and hand trenching in 1998.

Capsule Geology

Disseminated galena occurs in veinlets cutting a thick-bedded quartzite unit, which occurs at the contact between the Upper Proterozoic to Lower Cambrian Hyland Group green and grey argillite and overlying Ordovician to Lower Devonian Road River Formation shale. The metasediments have been intruded by hornblende +/- biotite alkaki-feldspar syenite dykes of the Mid-Cretaceous Tombstone Plutonic Suite.
Followup of anomalous values of lead in silt samples resulted in the discovery of galena-siderite-quartz float boulders which assayed from 68 to 82% Pb, 39 to 250 oz/t Ag with up to 1% Cu and 1% Sb. Further prospecting, sampling and hand trenching in the area has located extensive float that is thought to be derived from two parallel northeast-southwest trending veins that have been located in subcrop and are approximately 100 m apart. Neither vein is well exposed due to extensive talus cover in the area, but Noranda estimated that the northernmost vein could be up to 40 cm wide assaying 11% Pb, 8 oz/t Ag and 0.2 oz/t Au.
Drilling was only partially successful due to poor ground conditions and problems with core recovery. Noranda was able to determine though, that the northernmost vein appears to be narrow and discontinuous. Only one hole was drilled to test the second vein and it never reached its projected depth, again due ground conditions.
This occurrence now lies within the boundaries of the Tombstone Territorial Park and the area has been withdrawn from staking.

References

BREMNER, T.J., 1994. Proposed Tombstone Park ¿ Preliminary Review of Mineral Potential. Exploration and Geological Services Division, Indian and Northern Affairs Canada. Open File 1994-2(T), 115 p.

CANADIAN UNITED MINES INC, Aug/99. Assessment Report #094120 by S. Ryan.

MATTAGAMI LAKE EXPLORATION LTD, Feb/82. Assessment Report #090980 by J. Biczok.

MATTAGAMI LAKE EXPLORATION LTD, Nov/82. Assessment Report #091417 by B. Jago.

NORANDA EXPLORATION COMPANY LTD, Jan/84. Assessment Report #091506 by J. Biczok.

NORANDA EXPLORATION COMPANY LTD, Feb/85. Assessment Report #091607 by W. Reid.

THOMPSON, R.I., ROOTS, C.F. AND MUSTARD, P.S., 1992. Geology of Dawson map area (116B, C) (northeast of Tintina Trench); Geological Survey of Canada, Open File 2849 (13 sheets, scale: 1:50 000).

THOMPSON, R.I., 1995. Geological compilation of Dawson map area (116B, C) (northeast of Tintina Trench), scale 1:250 000. Geological Survey of Canada, Open File 3223.

YUKON EXPLORATION AND GEOLOGY 1981, p. 240; 1982, p. 226; 1983, p. 279.

Location Map

Last Updated: Jul 16, 2018

Work History

Year Work Type Comment
1998 Other: Prospecting
1998 Trenching: Hand
1994 Drilling: Diamond Three holes, 223.7 m.
1984 Geochemistry: Soil
1984 Ground Geophysics: EM Also VLF survey.
1983 Drilling: Diamond Three holes, 50 m.
1983 Geochemistry: Soil
1983 Geology: Bedrock Mapping
1983 Ground Geophysics: EM Also VLF survey.
1982 Geochemistry: Silt
1982 Geochemistry: Soil
1982 Geology: Detailed Surficial Mapping 1:10 000 scale.
1981 Geochemistry: Silt
1981 Geochemistry: Water
1981 Geology: Bedrock Mapping
1981 Other: Prospecting

Regional Geology - Terrane

Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia


Regional Geology - Bedrock

Supergroup:
Group/Suite: Road River
Formation:
Member:
Terrane: Laurentia
Period Max: Ordovician
Age Max: 488 MA
Period Min: Devonian
Age Min: 398 MA
Rock Major: shale
Rock Minor: sandstone
Reference: Thompson et al. (1994) - GSC OF 2849
Geological Unit (1M): ODR
Geological Unit (250K): ODR

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
094120 1998 TAK 1-10 Prospecting and Trenching Rock - Geochemistry, Prospecting - Other, Handblast - Trenching
091607 1984 1984 Geology, Geochemistry, Geophysics and Diamond Drilling on the TAK 1-52 Claims Diamond - Drilling, Drill Core - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Line Cutting - Other 3 223.70
091506 1983 1983 Geology, Geochemistry, Geophysics and Drilling Tak 1-52 Claims Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Soil - Geochemistry, EM - Ground Geophysics, Magnetics - Ground Geophysics 3 50
091417 1982 1982 Geology and Geochemistry on the TAK 1-48 Claims Rock - Geochemistry, Silt - Geochemistry, Regional Bedrock Mapping - Geology
090980 1981 1981 Geology and Geochemistry on the TAK 1-48 Claims Rock - Geochemistry, Silt - Geochemistry, Water - Geochemistry, Detailed Bedrock Mapping - Geology

Related References

Number Title Page(s) Document Type
ARMC016779 Geochemical map - 116B/10 Geochemical Map
Citations

Drill Core at YGS Core Library

Number Property Year Drilled Core Size Photos Data
DDH-T-84-4 Tak 1984 NQ 0 1
DDH-T-84-6 Tak 1984 NQ 6 1

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