General Information
Secondary Commodities: copper, tungsten
Aliases: Hi-Min, Omo
Deposit Type(s): Skarn W
Location(s): 62.776940 N, -129.869440 W
NTS Mapsheet(s): 105I13
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
First staked in Aug/60 as Pete cl (75156) by Canol Met ML. Restaked as Pete cl (Y13001) in June/66 by A. McLeod, and by Hudson Bay Mg as Hi cl (Y22001) in Aug/67, Min cl (Y28114) in Sept/68, Omo cl (Y41528) in Sept/69 and Lan cl (Y42389) in June/70. Hudson Bay explored with mapping and geochem sampling and one 10.7 m packsack hole in 1968, 2 holes (612.7 m) in 1969, hand trenching and 6 holes (334.7 m) in 1970, and 6 holes (477.8 m) in 1971 and sold its claims in 1976 to Placer Dev L & Essex Mls C, which added Clea cl (YA978) in Sep/76.
Yukon Revenue ML added on the He cl (YA11289) to the east in Sept/76. Placer and Essex explored with mapping and geochemical surveys in 1977, 21 holes (3230.9 m) in 1978, 8 holes (1280 m) in 1979, 33 holes (905.6 m) in 1980 and 5 holes (1616.1 m) in 1981.
Restaked by Placer Dome Canada as 182 Clea claims (YA00978) in Feb/94.
Capsule Geology
Two skarn showings occur about 1.6 km apart in Silurian or Devonian limestone and argillite near a stock which is 370 m in diameter.
The showing drilled by Hudson Bay in 1968-72 (Min & Omo groups), consists of almost massive pyrrhotite with minor amounts of chalcopyrite, scheelite and sphalerite in siliceous skarn within the large contact aureole around the stock. Host rocks are argillite and limestone of probable Silurian or Devonian age. The best core assays obtained by Hudson Bay were 1.4% WO3 and 0.2% Cu across 1.6 m in Hole 2 and 2.3% WO3 and 1.0% Cu across 2.2 m in Hole 3.
The Clea showing consists of scheelite, pyrrhotite and chalcopyrite in strongly deformed quartz-biotite-diopside-garnet skarn that occurs both in a hornfelsed roof pendant and in a complex contact setting above the flat-lying roof of the stock. Isoclinal folds with axial planes which strike northwest and dip southwest have repeated the 45.7 m thick calc-silicate unit at least eight times. All Placer and Essex drilling has been on the Clea. The only reported assays (1981) indicate intersections of 0.46% WO3 over 0.7 m and 0.19% WO3 over 2.6 m.
Both the Clea and Omo showings contain abundant vesuvianite, calcite and fluorite, an unusual assemblage for this type of occurrence. Both showings also have outer skarn alteration zones with narrow selvages containing cassiterite, molybdenite, and tin-bearing andradite and epidote.
References
CANEX PLACER LTD, 1977. Assessment Report *#090240 by J.M. Kowalchuk.
CANEX PLACER LTD, 1979. Assessment Report *#091196 by J.M. Kowalchuk.
CATHRO, R.J., Apr/69. Tungsten in Yukon. Western Miner, p. 29.
DICK, L.A., 1980. A comparative study of the geology, mineralogy and conditions of contact metasomatic mineral deposits in the northeastern Canadian Cordillera. Unpublished Ph.D. thesis, Queen's University, p. 29, 42-45, 75-79, 101-106, 353-358.
GEOLOGICAL SURVEY OF CANADA Paper 78-1A, p. 288-289.
HUDSON BAY EXPLORATION AND DEVELOPMENT COMPANY LTD, 1970. Assessment Report *#091194 by I. Young.
HUDSON BAY MINING AND SMELTING CO. LTD, Dec/68. Assessment Report #018915 by R.T. McIntosh & R.L. Larson.
MINERAL INDUSTRY REPORT 1977, p. 92-93; 1978, p. 70-71.
PLACER DEVELOPMENT LTD, Aug/78. Assessment Report *#091195 by T. Schneider and J.M. Kowalchuk.
PLACER DEVELOPMENT LTD, 1978. Assessment Report *#091191 by C. Rennie.
PLACER DEVELOPMENT LTD, 1980. Assessment Report *#090705 by M.B. Gareau and J.M. Kowalchuk.
PLACER DEVELOPMENT LTD, Oct/81. Assessment Report *#090880 by M.B. Gareau.
THOMPSON, K.M., Apr/78. Geology of the Clea Tungsten Deposit. Unpublished B.Sc. thesis, University of British Columbia.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 190.
YUKON EXPLORATION AND GEOLOGY 1981, p. 147.
First staked in Aug/60 as Pete cl (75156) by Canol Met ML. Restaked as Pete cl (Y13001) in June/66 by A. McLeod, and by Hudson Bay Mg as Hi cl (Y22001) in Aug/67, Min cl (Y28114) in Sept/68, Omo cl (Y41528) in Sept/69 and Lan cl (Y42389) in June/70. Hudson Bay explored with mapping and geochem sampling and one 10.7 m packsack hole in 1968, 2 holes (612.7 m) in 1969, hand trenching and 6 holes (334.7 m) in 1970, and 6 holes (477.8 m) in 1971 and sold its claims in 1976 to Placer Dev L & Essex Mls C, which added Clea cl (YA978) in Sep/76.
Yukon Revenue ML added on the He cl (YA11289) to the east in Sept/76. Placer and Essex explored with mapping and geochemical surveys in 1977, 21 holes (3230.9 m) in 1978, 8 holes (1280 m) in 1979, 33 holes (905.6 m) in 1980 and 5 holes (1616.1 m) in 1981.
Restaked by Placer Dome Canada as 182 Clea claims (YA00978) in Feb/94.
Capsule Geology
Two skarn showings occur about 1.6 km apart in Silurian or Devonian limestone and argillite near a stock which is 370 m in diameter.
The showing drilled by Hudson Bay in 1968-72 (Min & Omo groups), consists of almost massive pyrrhotite with minor amounts of chalcopyrite, scheelite and sphalerite in siliceous skarn within the large contact aureole around the stock. Host rocks are argillite and limestone of probable Silurian or Devonian age. The best core assays obtained by Hudson Bay were 1.4% WO3 and 0.2% Cu across 1.6 m in Hole 2 and 2.3% WO3 and 1.0% Cu across 2.2 m in Hole 3.
The Clea showing consists of scheelite, pyrrhotite and chalcopyrite in strongly deformed quartz-biotite-diopside-garnet skarn that occurs both in a hornfelsed roof pendant and in a complex contact setting above the flat-lying roof of the stock. Isoclinal folds with axial planes which strike northwest and dip southwest have repeated the 45.7 m thick calc-silicate unit at least eight times. All Placer and Essex drilling has been on the Clea. The only reported assays (1981) indicate intersections of 0.46% WO3 over 0.7 m and 0.19% WO3 over 2.6 m.
Both the Clea and Omo showings contain abundant vesuvianite, calcite and fluorite, an unusual assemblage for this type of occurrence. Both showings also have outer skarn alteration zones with narrow selvages containing cassiterite, molybdenite, and tin-bearing andradite and epidote.
References
CANEX PLACER LTD, 1977. Assessment Report *#090240 by J.M. Kowalchuk.
CANEX PLACER LTD, 1979. Assessment Report *#091196 by J.M. Kowalchuk.
CATHRO, R.J., Apr/69. Tungsten in Yukon. Western Miner, p. 29.
DICK, L.A., 1980. A comparative study of the geology, mineralogy and conditions of contact metasomatic mineral deposits in the northeastern Canadian Cordillera. Unpublished Ph.D. thesis, Queen's University, p. 29, 42-45, 75-79, 101-106, 353-358.
GEOLOGICAL SURVEY OF CANADA Paper 78-1A, p. 288-289.
HUDSON BAY EXPLORATION AND DEVELOPMENT COMPANY LTD, 1970. Assessment Report *#091194 by I. Young.
HUDSON BAY MINING AND SMELTING CO. LTD, Dec/68. Assessment Report #018915 by R.T. McIntosh & R.L. Larson.
MINERAL INDUSTRY REPORT 1977, p. 92-93; 1978, p. 70-71.
PLACER DEVELOPMENT LTD, Aug/78. Assessment Report *#091195 by T. Schneider and J.M. Kowalchuk.
PLACER DEVELOPMENT LTD, 1978. Assessment Report *#091191 by C. Rennie.
PLACER DEVELOPMENT LTD, 1980. Assessment Report *#090705 by M.B. Gareau and J.M. Kowalchuk.
PLACER DEVELOPMENT LTD, Oct/81. Assessment Report *#090880 by M.B. Gareau.
THOMPSON, K.M., Apr/78. Geology of the Clea Tungsten Deposit. Unpublished B.Sc. thesis, University of British Columbia.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 190.
YUKON EXPLORATION AND GEOLOGY 1981, p. 147.
Location Map
Last Updated: Sep 15, 2011
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1981 | Drilling: Diamond | Number of holes drilled: 5 Amount of work done: 1616 METRES |
| 1980 | Drilling: Diamond | Number of holes drilled: 33 Amount of work done: 905.6 METRES |
| 1979 | Drilling: Diamond | Number of holes drilled: 8 Amount of work done: 1280.2 METRES |
| 1978 | Drilling: Diamond | Number of holes drilled: 21 Amount of work done: 3291.8 METRES |
| 1977 | Geology: Bedrock Mapping | |
| 1977 | Other | |
| 1971 | Drilling: Diamond | Number of holes drilled: 6 Amount of work done: 447.8 METRES |
| 1970 | Drilling: Diamond | Number of holes drilled: 6 Amount of work done: 334.7 METRES |
| 1970 | Trenching: Hand | |
| 1969 | Drilling: Diamond | Number of holes drilled: 2 Amount of work done: 612.6 METRES |
| 1968 | Drilling: Diamond | Number of holes drilled: 1 Amount of work done: 10.67 METRES |
| 1968 | Geology: Bedrock Mapping | |
| 1968 | Other |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Mayo
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 98 MA
Period Min: Cretaceous
Age Min: 93 MA
Rock Major: quartz monzonite/granodiorite/quartz diorite/syenite
Rock Minor:
Reference: Gordey (1992) - GSC Map 1762A
Geological Unit (1M): mKM
Geological Unit (250K): mKgM
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 091191 | 1978 | [Diamond Drilling on Clea Claims] | Diamond - Drilling | 4 | 898.70 |
| 091195 | 1978 | [Diamond Drilling on Clea, R and Don Claims] | Diamond - Drilling | ||
| 090240 | 1977 | 1977 Progress Report | Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Hand - Trenching | ||
| 018915 | 1968 | Geological Mapping Yukon Territory Mount Wilson Region | Rock - Geochemistry, Bedrock Mapping - Geology |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016515 | Geochem samples overlay maps - 105I/13 | Geochemical Map |
| Citations |
|---|
Drill Core at YGS Core Library
| Number | Property | Year Drilled | Core Size | Photos | Data |
|---|---|---|---|---|---|
| DDH-1 | Clea | 1970 | AQ | 2 | 1 |
| DDH-2 | Clea | 1970 | AQ | 4 | 1 |
| DDH-3 | Clea | 1970 | AQ | 2 | 1 |
