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Occurrence Details


Occurrence Number
116C 118
Occurrence Name
Fortymile
Occurrence Type
Hard-rock
Status
Prospect


General Information

Secondary Commodities: copper, gold, zinc, silver, lead
Aliases: Golden Gate, Queen Of North, Rose, Teehee
Deposit Type(s): Vein Polymetallic Ag-Pb-Zn+/-Au
Location(s): 64.418330 N, -140.560280 W
NTS Mapsheet(s): 116C07
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No

Capsule

Work History

Two old shafts are present at this point for which no history has been found. It is probably the gold-silver prospect mentioned by Ogilvie when he first visited the district in 1887 and, if so, is one of the first lode discoveries in Yukon. The earliest records found are for claim 795, recorded by Isabella M. Healy in Aug/1896, and Queen of the North cl (7257) in Sep/1905.
Restaked as Golden Gate cl (12944) in Dec/19 by J. Fournier. One shaft, at least 15 m deep, is present from this period.
Restaked as Teehee cl (YA32726) in Jun/79 by Teslin JV (Cassiar Asbestos Corp L, Cominco L & Exploram Mls L). The north side along the river was staked as Smokey cl (YA65555) in May/83 by T. Wylie.
Restaked as Ogil cl (YB4663) in Dec/87 by Homestake Ml Dev C, which performed mapping and geochem sampling in 1988 and tied on FMR cl (YB17256) to the north and east in Jun/88.

Capsule Geology

Mineralization on the shaft dump consists of a mixture of pyrite, galena, sphalerite, chalcopyrite and tetrahedrite in a quartz-carbonate gangue. A representative specimen assayed in 1979 returned 96.0 g/t Ag, 3.4 g/t Au, 5.7% Pb, 3.4% Zn and 0.3% Cu. Bedrock on the dump consists of graphite and chlorite schist.
The shaft was sunk through thick river gravels in a flat, swampy area and the nearest outcrop, situated on the bank of Fortymile River, is composed of south-dipping chlorite schist. A specimen assayed by Ogilvie in 1887 assayed 3123.4 g/t Ag and trace Au. He reported in 1895 that a large tonnage of gold ore was also present (Cone Hill?) and that two test shipments were made - 0.9 tonnes in 1895 and 4.5 tonnes in 1896.

 

Location Map

Last Updated: Apr 4, 2017

Work History

Year Work Type Comment
1988 Geology: Bedrock Mapping 1:50 000 scale.
1988 Other

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian


Regional Geology - Bedrock

Supergroup:
Group/Suite: Slide Mountain
Formation:
Member:
Terrane: Slide Mountain
Period Max: Carboniferous
Age Max: 359 MA
Period Min: Permian
Age Min: 260 MA
Rock Major: dunite/peridotite/harzburgite/diabase/serpentinite
Rock Minor:
Reference: Mortensen - unpublished compilation
Geological Unit (1M): CPSM
Geological Unit (250K): CPSM4

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096527 2012 Soil Geochemistry and Geophysical Survey Interpretation at the Magnum Property Soil - Geochemistry, Soil - Geochemistry, Process/Interpret - Pre-existing Data, Process/Interpret - Pre-existing Data
094762 2006 Assessment Report Describing Geophysical Surveys at the MAGNUM Property EM - Ground Geophysics, Magnetics - Ground Geophysics
094803 2006 Airborne Geophysical Surveys and Diamond Drilling at the MAGNUM Property Magnetic - Airborne Geophysics, VTEM - Airborne Geophysics, Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Prospecting - Other 2 368.81
092673 1988 1988 Geological Mapping and Ltihogeochemical Sampling on the FORTYMILE Property Rock - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other

Related References

Number Title Page(s) Document Type
Citations
Ogilvie, W., 1897. Information respecting the Yukon district. Reports of Wm. Ogilvie, Dominion Land Surveyor, and from other sources. Department of the Interior, Ottawa.

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