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Occurrence Details

Occurrence Number
105D 231
Occurrence Name
Pass Lake
Occurrence Type

General Information

Secondary Commodities: copper, gold
Aliases: Whitehorse Copper
Deposit Type(s): Skarn
Location(s): 60.615750 N, -135.075490 W
NTS Mapsheet(s): 105D11
Hand Samples Available at YGS: No


The Whitehorse Copper Belt is located west of Whitehorse and contains 30+ mines, deposits and showings. By 1900, most of the important deposits had been discovered and the first small ore shipment was made that year. Many of the occurrences in the Copper Belt are skarns. The skarns form on or near the contact between the Whitehorse batholith and the Lewes River group. The Whitehorse batholith is commonly a grey coarse-grained hornblende granite and ranges from quartz monzonite to granodiorite to diorite. The Lewes River group contains numerous different rock types, most importantly of which is the limestone group, which is essential in the formation of skarns in the area.  A small number of occurrences within the Copper Belt are vein and/or replacement and occur within the Whitehorse batholith granite. 

The skarn zone is 2 to 5 feet (0.61 – 1.5 m) wide and 100 feet (30 m) long and is composed largely of garnet, calcite, epidote and magnetite. This zone contains minor amounts of chalcopyrite and bornite. Assays contain traces of gold, 0.4% Cu, and 56.65% Fe.

Location Map

Last Updated: Apr 15, 2019

Work History

Year Work Type Comment
1968 Geology: Bedrock Mapping
1968 Ground Geophysics: EM
1968 Ground Geophysics: Magnetics

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Stikinia
Realm: peri-Laurentian

Regional Geology - Bedrock

Group/Suite: Whitehorse
Period Max: Cretaceous
Age Max: 112 MA
Period Min: Cretaceous
Age Min: 105 MA
Rock Major: quartz monzonite/granite/monzonite/syenite
Rock Minor:
Reference: Hart & Radloff (1990) - YGS OF 1990-4
Geological Unit (1M): mKW
Geological Unit (250K): mKqW

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
062018 1973 Preliminary Report on Geological Control to Ore Distribution in the Whitehorse Copper Belt Reverse Circulation - Drilling, Bedrock Mapping - Geology, Petrographic - Lab Work/Physical Studies 665 5555

Related References

Number Title Page(s) Document Type
1984-1 The Whitehorse Copper Belt - A Compilation Open File (Geological - Bedrock)
Kindle, E.D., “Summary of Research: Field, 1962”; Geological Survey of Canada, Paper no. 63-1, 1963, (Open Access)
The mineral industry of Yukon Territory and southwestern District of Mackenzie, 1968; Findlay, D C. Geological Survey of Canada, Paper 69-55, 1969, 71 pages, (Open Access)

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