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Occurrence Details


Occurrence Number
105J 008
Occurrence Name
Mt Sheldon
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: arsenic, bismuth, copper, gold, silver, tellurium, tin, tungsten
Deposit Type(s): Unknown
Location(s): 62.718330 N, -131.091390 W
NTS Mapsheet(s): 105J11
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

The occurrence was discovered in 1944 by E.D. Kindle of the GSC, who located three gold bearing quartz veins in and near the Mount Sheldon granitic intrusive. In 1990, a GSC released regional stream sediment and water geochemical open file reported anomalous values for a stream sediment sample collected from a creek draining the west slope of Mount Sheldon.
In Dec/91 Crysi Exploration Ltd. staked the Sheldon cl 1-48 (YB36641) to explore for a Fort Knox, Alaska, type mineralization. The next year the claims were optioned by Kokanee Explorations Ltd, which prospected, mapped and sampled the property. In 1993 Kokanee Explorations changed its name to Consolidated Ramrod Gold Corporation and conducted a program of lithogeochemical sampling. In 1994 Consolidated Ramrod continued geological mapping and prospecting on the property.

Capsule Geology

Gold occurs with arsenopyrite in quartz veins exposed on the flanks of Mt Sheldon. The showings occur near the contact between clastic rocks of the Ordovician-Silurian Road River Formation and a small stock of Cretaceous biotite granite.
Three veins were sampled by the Geological Survey of Canada. On the east side of the mountain, a 60 cm wide quartz vein cutting porphyritic granite is exposed for 15 m. A chip sample containing 5% arsenopyrite assayed 0.51 g/t Au. On the northeast side of the mountain, a chip sample from a 30 by 60 cm area of pyrrhotite in hornfels and limestone assayed 0.2% Cu and trace Au. On the south side of the mountain, a small quartz-arsenopyrite vein in granite assayed 0.69 g/t Au and 0.06% Sn.
In 1993, Kokanee Explorations assayed a specimen of quartz-veined megacrystic granite from the east flank of the mountain and obtained 230 ppb Au, 1.4 ppm Ag, 186 ppm As, 6 ppm Bi, 32 ppm W and 0.55 ppm Te. Work carried out by the company in 1994 showed that the best results were obtained from the granitic intrusions. Nine rock samples collected from hornfels adjacent to the granitic intrusive returned background or below detection limits for most elements including gold.
A total of 176 rock samples, 54 soil samples and 2 silt samples were collected by Consolidated Ramrod Gold. Eleven of the rock samples, all collected from granite returned values between 272 and 6 167 ppb Au. The samples are mostly megacryst, variably altered, weakly mineralized with arsenopyrite, pyrite, pyrrhotite and chalcopyrite and occasionally cut by quartz vein stockworks.

References

CONSOLIDATED RAMROD GOLD CORPORATION, Mar/94. Assessment Report #093169 by R.A. Doherty and J. vanRanden.

CONSOLIDATED RAMROD GOLD CORPORATION, Dec/94. Assessment Report #093220 by R.A.
Doherty and J. vanRanden.

KINDLE, E.D., 1945. Geological Reconnaissance along the Canol Road, from Teslin River to Macmillan Pass, Yukon. Geological Survey of Canada, Paper 45-21, p. 25.

HORNBROOK, E.H.W. et al, 1990. Regional stream sediment and water geochemical data, East-Central Yukon; NTS 105J GSC, Open File 2173.

KOKANEE EXPLORATIONS LTD, Jan/93. Assessment Report #093063 by R.W. Hulstein.

Location Map

Last Updated: Sep 15, 2011

Work History

Year Work Type Comment
1994 Geology: Bedrock Mapping
1994 Other
1993 Other Really lithogeochemical sampling.
1992 Geology: Bedrock Mapping
1992 Other
1992 Other

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/chert/siltstone/limestone/conglomerate
Rock Minor:
Reference: Gordey (1996) - GSC Map 19-1987, sheet 1
Geological Unit (1M): ODR
Geological Unit (250K): ODR

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
093220 1994 Report on the 1994 Geological and Geochemical Assessment Work on the Mount Sheldon Property Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other
093169 1993 Report on the 1993 Geological and Geochemical Assessment Work on the Mount Sheldon Property Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other
093063 1992 Report on the 1992 Geological and Geochemical Assessment Work on the Mount Sheldon Property Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other
018941 1968 Hess Project Report 1968 Laforce Lake - Mount Selous Area Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Regional Bedrock Mapping - Geology, Prospecting - Other

Related References

Number Title Page(s) Document Type
ARMC016688 Geochemical results and claim group map - 105J/09 - Ross River Geochemical Map
ARMC016686 Geochem samples map - 105J/11 - Sheldon Lake Geochemical Map
ARMC016687 Geochem samples map - 105J/11 - Sheldon Lake - With notes on Selwyn project Geochemical Map
Citations

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