General Information
Secondary Commodities: molybdenum, copper
Aliases: Co, Cofield, Dr, Iten, Kokup, Oke, Ray
Deposit Type(s): Porphyry Cu-Mo-Au
Location(s): 62.647780 N, -138.489440 W
NTS Mapsheet(s): 115J09
Location Comments: 1 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
The northwest edge of the property was partially staked as Ray cl (97882) in Jan/66 by Nordex EL, which performed a geochem survey later in the year. Staked in Jul/69 as CO cl (Y35756) by Newmont on the northwest end, and as DR and Patsy cl (Y35652) in Jul/69 by Dawson Range JV (Straus E Inc, Martin Marietta Corp, Molybdenum Corp of America, Trojan Cons M, and Great Plains Dev C of Can L) on the southeast end. Both groups were explored with mapping and geochem surveys later in the year.
In 1970, the CO group was optioned by United Keno E (United Keno Hill ML, Falconbridge and Can Superior EL), which explored with geochem and IP surveys and 6 drill holes (1479.5 m) and prepared a topographic map from airphotos in 1972.
Restaked as Cofield cl (YA7532) in Aug/76 and as Kokup cl (YA22201) in Aug/79 by Archer, Cathro & Assoc Ltd and optioned in 1980 by Denison ML, which performed mapping and a geochem survey. Cominco tied on the Battle cl (YA48695) in Apr/80 and carried out mapping and a geochem survey.
Archer, Cathro added OKE & Hen cl (YA92164) in Jun/85 and sold the property to Nordac Mg Corp, which optioned it briefly to Gyro Energy & Mls Corp. Nordac, which conducted mapping and geochem sampling in 1986, became Big Creek Res L in 1987.
The Hud & Barr cl (Y49181) were tied on to the south and east in Jan/70 by London Pride Silver ML. Kerr Addison ML tied on KOE cl (YA78417) to the southeast in Sep/83 and explored with mapping and geochem sampling in 1984 and 1985, VLF-EM surveys and hand trenching in 1985 and 5 holes (443.6 m) in 1986.
Walhala Exploration Ltd staked Bat cl (YB35850) northwest of Mt Cockfield in May/91. Both Noranda and Placer Dome visited the property in Aug/91 and took silt, soil and rock samples. This work was compiled for Walhala by Aurum Geological Consultants Inc. in 1992. Galleon Mining Ltd purchased a 20% interest in Walhala's assets in Dec/91.
Capsule Geology
Disseminations and veinlets of pyrite, chalcopyrite and molybdenite occur in a complex intrusive and volcanic setting. The mineralization is best developed in and around a small weakly altered quartz monzonite stock which cuts Paleozoic Nisling Terrane schist and Triassic Klotassin granodiorite at the head of West Battle Creek. The 1970 drilling indicated a fairly uniform grade averaging about 0.03% Cu and 0.013% Mo.
Cominco outlined a number of Cu-Mo anomalies associated with the stock. Chalcedonic quartz veins and clay-sericite-pyrite alteration occur along a major northwest-trending fault. Float from the fault zone is highly anomalous in gold, silver, antimony and arsenic.
The 1986 soil sampling by Nordac returned scattered anomalous gold values as high as 305 ppb, while Kerr Addison's trenches along the northwest-trending fault zone produced a few high values from fault breccia and drusy or massive quartz veins containing arsenopyrite.
Aurum's 1992 compilation shows a strong 500 x 1000 m copper anomaly (>500 ppm Cu) approximately 1.5 km west of Mt Cockfield, and a Noranda rock sample from the same area contained 42 ppb Au, 1035 ppm Cu and 314 ppm Mo.
References
COMINCO LTD, Dec/80. Assessment Report #090792 by A. Denton.
DAWSON RANGE JOINT VENTURE, 1970. Assessment Report *#061373 by R.J. Cathro.
DAWSON RANGE JOINT VENTURE, 1970. Assessment Report *#061124 by D.D. Rand.
DENISON MINES LTD, Mar/81. Assessment Report *#090767 by R.J. Cathro.
GYRO EXPLORATION AND MINING CORP., Dec/85. Engineer's Report by J.M. Dawson.
KERR ADDISON MINES LTD, Oct/84. Assessment Report *#091568 by H. Copland and D. Arscott.
KERR ADDISON MINES LTD, Jan/86. Assessment Report *#091725 by D. Arscott.
MINERAL INDUSTRY REPORT 1969-70, p. 64-68.
NEWMONT MINING CORPORATION OF CANADA LTD, 1969. Assessment Report *#060215 by C.P. Costin and W. Dolan.
UNITED KENO HILL MINES LTD, 1970. Assessment Report *#091346 by I.D. and R.E.V.
WALHALA EXPLORATION LTD, Jan/93. Assessment Report #093064 by R.A. Doherty.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 265-266.
YUKON EXPLORATION AND GEOLOGY 1984 (Open File).
YUKON EXPLORATION 1985-86, p. 361; 1987, p. 279.
The northwest edge of the property was partially staked as Ray cl (97882) in Jan/66 by Nordex EL, which performed a geochem survey later in the year. Staked in Jul/69 as CO cl (Y35756) by Newmont on the northwest end, and as DR and Patsy cl (Y35652) in Jul/69 by Dawson Range JV (Straus E Inc, Martin Marietta Corp, Molybdenum Corp of America, Trojan Cons M, and Great Plains Dev C of Can L) on the southeast end. Both groups were explored with mapping and geochem surveys later in the year.
In 1970, the CO group was optioned by United Keno E (United Keno Hill ML, Falconbridge and Can Superior EL), which explored with geochem and IP surveys and 6 drill holes (1479.5 m) and prepared a topographic map from airphotos in 1972.
Restaked as Cofield cl (YA7532) in Aug/76 and as Kokup cl (YA22201) in Aug/79 by Archer, Cathro & Assoc Ltd and optioned in 1980 by Denison ML, which performed mapping and a geochem survey. Cominco tied on the Battle cl (YA48695) in Apr/80 and carried out mapping and a geochem survey.
Archer, Cathro added OKE & Hen cl (YA92164) in Jun/85 and sold the property to Nordac Mg Corp, which optioned it briefly to Gyro Energy & Mls Corp. Nordac, which conducted mapping and geochem sampling in 1986, became Big Creek Res L in 1987.
The Hud & Barr cl (Y49181) were tied on to the south and east in Jan/70 by London Pride Silver ML. Kerr Addison ML tied on KOE cl (YA78417) to the southeast in Sep/83 and explored with mapping and geochem sampling in 1984 and 1985, VLF-EM surveys and hand trenching in 1985 and 5 holes (443.6 m) in 1986.
Walhala Exploration Ltd staked Bat cl (YB35850) northwest of Mt Cockfield in May/91. Both Noranda and Placer Dome visited the property in Aug/91 and took silt, soil and rock samples. This work was compiled for Walhala by Aurum Geological Consultants Inc. in 1992. Galleon Mining Ltd purchased a 20% interest in Walhala's assets in Dec/91.
Capsule Geology
Disseminations and veinlets of pyrite, chalcopyrite and molybdenite occur in a complex intrusive and volcanic setting. The mineralization is best developed in and around a small weakly altered quartz monzonite stock which cuts Paleozoic Nisling Terrane schist and Triassic Klotassin granodiorite at the head of West Battle Creek. The 1970 drilling indicated a fairly uniform grade averaging about 0.03% Cu and 0.013% Mo.
Cominco outlined a number of Cu-Mo anomalies associated with the stock. Chalcedonic quartz veins and clay-sericite-pyrite alteration occur along a major northwest-trending fault. Float from the fault zone is highly anomalous in gold, silver, antimony and arsenic.
The 1986 soil sampling by Nordac returned scattered anomalous gold values as high as 305 ppb, while Kerr Addison's trenches along the northwest-trending fault zone produced a few high values from fault breccia and drusy or massive quartz veins containing arsenopyrite.
Aurum's 1992 compilation shows a strong 500 x 1000 m copper anomaly (>500 ppm Cu) approximately 1.5 km west of Mt Cockfield, and a Noranda rock sample from the same area contained 42 ppb Au, 1035 ppm Cu and 314 ppm Mo.
References
COMINCO LTD, Dec/80. Assessment Report #090792 by A. Denton.
DAWSON RANGE JOINT VENTURE, 1970. Assessment Report *#061373 by R.J. Cathro.
DAWSON RANGE JOINT VENTURE, 1970. Assessment Report *#061124 by D.D. Rand.
DENISON MINES LTD, Mar/81. Assessment Report *#090767 by R.J. Cathro.
GYRO EXPLORATION AND MINING CORP., Dec/85. Engineer's Report by J.M. Dawson.
KERR ADDISON MINES LTD, Oct/84. Assessment Report *#091568 by H. Copland and D. Arscott.
KERR ADDISON MINES LTD, Jan/86. Assessment Report *#091725 by D. Arscott.
MINERAL INDUSTRY REPORT 1969-70, p. 64-68.
NEWMONT MINING CORPORATION OF CANADA LTD, 1969. Assessment Report *#060215 by C.P. Costin and W. Dolan.
UNITED KENO HILL MINES LTD, 1970. Assessment Report *#091346 by I.D. and R.E.V.
WALHALA EXPLORATION LTD, Jan/93. Assessment Report #093064 by R.A. Doherty.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 265-266.
YUKON EXPLORATION AND GEOLOGY 1984 (Open File).
YUKON EXPLORATION 1985-86, p. 361; 1987, p. 279.
Location Map
Last Updated: Aug 31, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1991 | Geochemistry: Soil | Also rock and silt sampling. |
| 1986 | Geochemistry: Soil | |
| 1986 | Geology: Bedrock Mapping | |
| 1980 | Geochemistry: Soil | |
| 1980 | Geology: Bedrock Mapping | |
| 1972 | Drilling: Diamond | Six holes, 1,397 m. |
| 1972 | Geochemistry: Soil | |
| 1972 | Ground Geophysics: IP | |
| 1969 | Geochemistry: Soil | |
| 1969 | Geology: Bedrock Mapping | |
| 1966 | Geochemistry: Soil |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Carmacks
Formation:
Member: upper
Terrane:
Period Max: Cretaceous
Age Max: 73 MA
Period Min: Cretaceous
Age Min: 68 MA
Rock Major: basalt, andesite
Rock Minor:
Reference: Ryan et al. (2013) - GSC CGM 116
Geological Unit (1M): uKC
Geological Unit (250K): uKC1
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 093064 | 1992 | Geological and Geochemical Assessment Report on the Battle Mountain Property | Historical Drill Core - Geochemistry, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Prospecting - Other, Data Compilation - Pre-existing Data | ||
| 091924 | 1986 | Report on Geochemical Survey-Mt. Cockfield Property-Mt. Cockfield, Y.T. | Rock - Geochemistry, Soil - Geochemistry, Prospecting - Other | ||
| 090767 | 1980 | Report on Geology and Geochemistry-Kokup 1-24 Claims | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | ||
| 061124 | 1972 | Photogrammetric Mapping-Dr and Patsy Claims | Photogrammetry - Remote Sensing | ||
| 061373 | 1970 | Geological Mapping and Geochemical Sampling-Dr 1-64 and Patsy 1-8-Mt Cockfield Area | Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | ||
| 091346 | 1970 | 1970 Diamond Drill Statistics-Mount Cockfield | Diamond - Drilling, Drill Core - Geochemistry | 6 | 1397.20 |
| 060215 | 1969 | Geophysical and Geochemical Reports on the CO Claim Group | Silt - Geochemistry, Soil - Geochemistry, Magnetics - Ground Geophysics |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC004700 | 1986 program report on the Koe claims | Report | |
| ARMC016555 | Photo interpretation map of geology with coloured sections - 115J/9 - Selwyn River | Geoscience Map (Geological - Bedrock) | |
| ARMC016554 | Photo interpretation map showing claims - 115J/9 - Selwyn River | Geoscience Map (General) | |
| ARMC016556 | Geology map - 115J/9 - Selwyn River | Geoscience Map (Geological - Bedrock) |
| Citations |
|---|
Drill Core at YGS Core Library
| Number | Property | Year Drilled | Core Size | Photos | Data |
|---|---|---|---|---|---|
| YK-86-01 | Cockfield | 1986 | BQ | 0 | 3 |
| YK-86-02 | Cockfield | 1986 | BQ | 0 | 2 |
| YK-86-03 | Cockfield | 1986 | BQ | 10 | 2 |
| YK-86-04 | Cockfield | 1986 | BQ | 8 | 2 |
| YK-86-05 | Cockfield | 1986 | BQ | 4 | 2 |
