General Information
Secondary Commodities: asbestos
Aliases: Dick, Et, Johnnie, Nigger, Toc, Wc
Deposit Type(s): Ultramafic-hosted asbestos
Location(s): 64.299720 N, -139.963060 W
NTS Mapsheet(s): 116B05
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Nigger, etc cl (58196) in Aug/55 by V.C. Mellor and associates, who explored with bulldozer trenching and hand pitting in 1956. The Gaymont Prospecting Synd tied on Johnnie and ET cl (78040) in Jun/56 and performed trenching later in the year.
Restaked as Dick, etc cl (79331) in Sep/63 by Canadian Johns-Manville CL, which conducted ground mag, mapping and bulldozer trenching in 1964. Restaked as WC cl (87609) in Jul/66 by Sphere Dev Corp L, which flew an aeromag survey in 1967.
Restaked as TOC cl (YA50101) in Jun/80 by Teslin JV (Cassiar Res L, Cominco & Exploram Mls L), which explored with 45 excavator pits in 1981. Cassiar changed its name to Brinco Mg L in 1981.
Capsule Geology
Trenching was performed at two serpentinite exposures located on either side of a high, gravel-covered plateau between the Yukon River and Woodchopper Creek. An intense northeast-trending aeromagnetic anomaly extends for 1.5 km between the showings but overburden over 5 m deep has hampered exploration in that area. A third ultramafic exposure located close to the mouth of Woodchopper Creek contains no visible asbestos and has never been trenched.
Chrysotile fibres up to 12 mm long occur within sporadic lenses of dark coloured, massive serpentinite that form envelopes around small bodies of altered diorite. The serpentinite lenses measure less than 5 m by 2 m and contain less than 2% total fibre. Surrounding serpentinites are highly sheared and contain no fibre. The ultramafitc rocks are surrounded by black graphitic argillite, graphitic schist and chlorite schist of the Nasina Series.
Coarsely crystalline, tan dolomite outcrops a few hundred metres to the south and a thin quartz-feldspar porphyry dyke occurs on the northeast side.
References
MINERAL INDUSTRY REPORT 1941-59, p. 112, 126.
SPHERE DEVELOPMENT CORP. LTD, Oct/66. Prospectus Report by G.P. White.
SPHERE DEVELOPMENT CORP. LTD, Aug/67. Assessment Report by D.R. Cochraine (Geo-X).
TESLIN JOINT VENTURE, Jan/82. Assessment Report *#090958 by J.S. Murray.
YUKON EXPLORATION AND GEOLOGY 1981, p. 238.
Staked as Nigger, etc cl (58196) in Aug/55 by V.C. Mellor and associates, who explored with bulldozer trenching and hand pitting in 1956. The Gaymont Prospecting Synd tied on Johnnie and ET cl (78040) in Jun/56 and performed trenching later in the year.
Restaked as Dick, etc cl (79331) in Sep/63 by Canadian Johns-Manville CL, which conducted ground mag, mapping and bulldozer trenching in 1964. Restaked as WC cl (87609) in Jul/66 by Sphere Dev Corp L, which flew an aeromag survey in 1967.
Restaked as TOC cl (YA50101) in Jun/80 by Teslin JV (Cassiar Res L, Cominco & Exploram Mls L), which explored with 45 excavator pits in 1981. Cassiar changed its name to Brinco Mg L in 1981.
Capsule Geology
Trenching was performed at two serpentinite exposures located on either side of a high, gravel-covered plateau between the Yukon River and Woodchopper Creek. An intense northeast-trending aeromagnetic anomaly extends for 1.5 km between the showings but overburden over 5 m deep has hampered exploration in that area. A third ultramafic exposure located close to the mouth of Woodchopper Creek contains no visible asbestos and has never been trenched.
Chrysotile fibres up to 12 mm long occur within sporadic lenses of dark coloured, massive serpentinite that form envelopes around small bodies of altered diorite. The serpentinite lenses measure less than 5 m by 2 m and contain less than 2% total fibre. Surrounding serpentinites are highly sheared and contain no fibre. The ultramafitc rocks are surrounded by black graphitic argillite, graphitic schist and chlorite schist of the Nasina Series.
Coarsely crystalline, tan dolomite outcrops a few hundred metres to the south and a thin quartz-feldspar porphyry dyke occurs on the northeast side.
References
MINERAL INDUSTRY REPORT 1941-59, p. 112, 126.
SPHERE DEVELOPMENT CORP. LTD, Oct/66. Prospectus Report by G.P. White.
SPHERE DEVELOPMENT CORP. LTD, Aug/67. Assessment Report by D.R. Cochraine (Geo-X).
TESLIN JOINT VENTURE, Jan/82. Assessment Report *#090958 by J.S. Murray.
YUKON EXPLORATION AND GEOLOGY 1981, p. 238.
Location Map
Last Updated: Sep 5, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1981 | Geology: Bedrock Mapping | |
| 1981 | Trenching: Mechanical | Dug 45 trenches. |
| 1967 | Airborne Geophysics: Magnetic | |
| 1964 | Geology: Bedrock Mapping | |
| 1964 | Ground Geophysics: Magnetics | |
| 1964 | Trenching: Mechanical | |
| 1956 | Trenching: Hand | |
| 1956 | Trenching: Mechanical |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Finlayson
Formation:
Member:
Terrane: Yukon-Tanana
Period Max: Devonian
Age Max: 365 MA
Period Min: Carboniferous
Age Min: 345 MA
Rock Major: quartzite/gr-quartzite/qt-ms-cl-schist
Rock Minor: conglo/grit
Reference: Mortensen - unpublished compilation
Geological Unit (1M): DMF
Geological Unit (250K): DMF4
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 090958 | 1981 | Geology, Fibre Dispersion Survey and Trenching on the TOC 1-28 Claims | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Petrographic - Lab Work/Physical Studies, Prospecting - Other, Backhoe - Trenching | ||
| 019108 | 1967 | Geophysical Report Airborne Magnetometer Surveys on the MON, TON, BIG, EAST, GIBB, CLIN. CHIN , W.C, and CALEY Groups | Magnetic - Airborne Geophysics | ||
| 018932 | 1967 | Report on Sphere Development Corporation Ltd. Clinton and Cassiar Creek Asbestos Areas | Electromagnetic - Airborne Geophysics, Bedrock Mapping - Geology, Magnetics - Ground Geophysics, Prospecting - Other | ||
| 017945 | 1967 | Geological Report [on the ABW Claims] | Rock - Geochemistry, Soil - Geochemistry, Prospecting - Other |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC013235 | "The Magic Mineral" - Sphere Development Corporation Ltd. | News Release | |
| ARMC013234 | New issue prospectus - Offering 200,000 shares - Sphere Development Corporation Ltd. - 116-C | News Release | |
| ARMC013227 | Sketch of claims on Woodchopper Creek, Dawson, Y.T. | Geoscience Map (General) |
| Citations |
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