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Occurrence Details


Occurrence Number
105D 233
Occurrence Name
Keewenaw
Occurrence Type
Hard-rock
Status
Past Producer


General Information

Primary Commodities: copper, gold, silver, molybdenum
Aliases: Whitehorse Copper
Deposit Type(s): Skarn
Location(s): 60.5780 N, -134.96 W
NTS Mapsheet(s): 105D11
Hand Samples Available at YGS: No

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 Keewenaw deposit is an oval-shaped zone about 500 feet (152 m) long and 250 feet (76 m) wide. The zone trends southeasterly and there are numerous dark, fine-grained diorite dykes (< 10 - 30 ft. wide, < 3 - 9 m wide) which cut the granite at a southeast trend. The granite is cut by felsite dykes and by feldspar porphyry dykes that also strike southeasterly. The oval shaped zone contains bornite and malachite and the fine-grained granite is strongly altered to epidote and chlorite with numerous fine-grained veinlets and fractures. The silicate chrysocolla is present in some rock cuts. Sheared granite zones contain bornite and occasional malachite.

Production during 1971 totalled 151 770 tonnes of ore at 1.02% and produced 1 596 tonnes of refined metal at 99% Cu. Calculated reserves at the end of 1971 totalled 202 653 tonnes of ore at 1.06 Cu.

Location Map

Last Updated: Apr 15, 2019

Work History

Year Work Type Comment
2014 Pre-existing Data: Research/Summarize
1998 Geochemistry: Rock
1998 Geochemistry: Soil
1970 Development, Surface: All Weather Road
1970 Development, Underground: Drifting/Raising
1970 Drilling: Diamond
1966 Studies: Feasibility
1964 Drilling: Diamond
1964 Ground Geophysics: IP

Regional Geology - Terrane

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


Regional Geology - Bedrock

Supergroup:
Group/Suite: Lewes River
Formation: Aksala
Member: Hancock
Terrane: Stikinia
Period Max: Triassic
Age Max: 217 MA
Period Min: Triassic
Age Min: 204 MA
Rock Major: conglo/limestone/dolostone
Rock Minor: chert
Reference: Wheeler (1961) - GSC Map 1093A
Geological Unit (1M): uTrAK
Geological Unit (250K): uTrAK2

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
097154 2017 Preliminary Geological Mapping on the Dennis 3, Lobo 1, and Gem 1 Claims Bedrock Mapping - Geology, Prospecting - Other
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
092025 1974 [Proposed 1974 Exploration of the Cowley Park and War Eagle Properties] Property Evaluation - Other
061172 1974 [Proposed 1974 Exploration of the Cowley Park and War Eagle Properties] Property Evaluation - Other
061173 1974 Report on Exploratory Work on Whitehorse Copper Belt Diamond - Drilling, Drill Core - Geochemistry, IP - Ground Geophysics 10 2222.29
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
062227 1966 An Evaluation of the New imperial Mines Ltd. Feasibility - Studies

Related References

Number Title Page(s) Document Type
094024 [Geological Report on the Sue,Jim,Ace,Dennis,Gem and Lobo Claims] Assessment Report
090945 [Drilling, Stripping and Road Construction on the Whitehorse Copper Belt Project] Assessment Report
062227 An Evaluation of the New imperial Mines Ltd. Assessment Report
ARMC004841 Geology and geophysics map - Chargeability milliseconds - Gem and Keewenaw Geophysical Map
ARMC004840 Map showing chargeability contours - 4 m/sec, 20 ppm contour - Gem and Keewenaw Geophysical Map
ARMC004844 Exploration composite map - Keewenaw and Cowley Park - Figure 7 Geoscience Map (General)
ARMC004839 Geology map - Gem-Keewenaw Geoscience Map (Geological - Bedrock)
ARMC004834 Exploration composite map - Keewenaw and Cowley Park Geoscience Map (Geological - Bedrock)
ARMC004842 Map showing Tavern Lake Geoscience Map (General)
1984-1 The Whitehorse Copper Belt - A Compilation Open File (Geological - Bedrock)
Citations
Carriere, J J, et al. “Copper Deposits and Occurrences in Yukon Territory.” Ottawa: Geological Survey of Canada, 1982., 1981, doi:10.4095/109350.
Kindle, E.D., “Summary of Research: Field, 1962”; Geological Survey of Canada, Paper no. 63-1, 1963, https://doi.org/10.4095/121464 (Open Access)
The mineral industry of Yukon Territory and southwestern District of Mackenzie 1964; Green, L H. Geological Survey of Canada, Paper 65-19, 1965, 94 pages, https://doi.org/10.4095/100981 (Open Access)

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