Occurrence Details


Occurrence Number:
105D 214
Occurrence Name:
Gem
Occurrence Type:
Hard-rock
Status:
Deposit
Date printed:
11/14/2024 5:53:07 PM

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General Information
Capsule
Work History
Assessment Reports
References

General Information

Primary Commodities: copper
Secondary Commodities: gold, molybdenum, silver
Aliases: Whitehorse Copper
Deposit Type(s): Skarn
Location(s): 60°34'50.61" N - -134°57'18.78" W
NTS Mapsheet(s): 105D10
Hand Samples Available: No
Last Reviewed:

Capsule

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 Gem deposit is a skarn located at the contact between the diorite of the Whitehorse batholith and the limestone of the Lewes group. In 1971 reserves calculated totalled 625 044 tonnes at 1.01% Cu.

Work History

Date Work Type Comment
12/13/1968 Drilling
12/13/1968 Geology
12/13/1968 Ground Geophysics
12/13/1968 Ground Geophysics

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
096680 2014 Summary Report Documenting the Cowley, Keewenaw and Gem Copper Deposits on the Lobo Property Research/Summarize - Pre-existing Data
095193 2008 Drilling and Geophysical Assessment Report on the Whitehorse Copper Belt Project Diamond - Drilling, Drill Core - Geochemistry, IP - Ground Geophysics 21 2134.10
094024 1998 [Geological Report on the Sue,Jim,Ace,Dennis,Gem and Lobo Claims] Rock - Geochemistry, Soil - Geochemistry
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
090945 1970 [Drilling, Stripping and Road Construction on the Whitehorse Copper Belt Project] All Weather Road - Development, Surface, Drifting/Raising - Development, Underground, Diamond - Drilling 5 206.96
091116 1968 [Diamond Drilling on the Gem 1 Claims] Diamond - Drilling 10 950.21

Related References

Number Title Page(s) Reference Type Document Type
ARMC004838 Longitudinal section map - Gem and Brown Cub Property File Collection Geoscience Map (General)
ARMC004836 Map of Gem claims Property File Collection Geoscience Map (Geological - Bedrock)
ARMC004841 Geology and geophysics map - Chargeability milliseconds - Gem and Keewenaw Property File Collection Geophysical Map
ARMC004839 Geology map - Gem-Keewenaw Property File Collection Geoscience Map (Geological - Bedrock)
ARMC004840 Map showing chargeability contours - 4 m/sec, 20 ppm contour - Gem and Keewenaw Property File Collection Geophysical Map
1984-1 The Whitehorse Copper Belt - A Compilation Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division Open File (Geological - Bedrock)