Unnamed Occurrence (ARDF - WI037; northwest of Colorado Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Unnamed Occurrence (ARDF - WI037; northwest of Colorado Creek) | - not defined - |
Koyukuk Mining District | Mining District |
Yukon-Koyukuk Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
67° 23' 57'' North , 152° 45' 28'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201915
Long-form identifier:
mindat:1:2:201915:7
GUID (UUID V4):
769b773f-444c-43cd-9d42-f58b6eda3ace
Location: This occurrence is located about 1.2 miles northwest of the mouth of Colorado Creek and about 6 miles east of the east end of Ernie Lake. The occurrence is at an elevation of about 1,160 meters; it is about 0.2 mile south-southwest of the top of hill 1224, about 0.5 mile northwest of the center of section 29, T. 30 N., R. 23 W., of the Fairbanks Meridian. The occurrence is the site of sample 225 in Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of azurite- and malachite-stained, garnet-epidote skarn that contains bornite and sphalerite (Dillon and others, 1981; sample 225 [AOF 133B]). A sample of skarn contains 7 ppm silver, 200 ppm bismuth, 5,000 ppm copper, 1,000 ppm tin, and 3,000 ppm zinc. The rocks in the area are Proterozoic(?) granitic rocks in contact with Proterozoic(?) marble, quartzite, and metabasite (Dillon and others, 1986).
Workings: Only surface sampling.
Alteration: Skarn development. Oxidation of copper mineral(s).
Commodities (Major) - Ag, Cu, Zn; (Minor) - Bi, Sn
Development Status: None
Deposit Model: Cu skarn deposit (Cox and Singer, 1986; model 18b)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
5 valid minerals.
Detailed Mineral List:
ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
ⓘ Bornite Formula: Cu5FeS4 |
ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
ⓘ | Sphalerite | 2.CB.05a | ZnS |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 9 - Silicates | |||
ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Unclassified | |||
ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | ⓘ Garnet Group | X3Z2(SiO4)3 |
Al | Aluminium | |
Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | Silicon | |
Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
S | Sulfur | |
S | ⓘ Bornite | Cu5FeS4 |
S | ⓘ Sphalerite | ZnS |
Ca | Calcium | |
Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | Iron | |
Fe | ⓘ Bornite | Cu5FeS4 |
Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Cu | Copper | |
Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
Cu | ⓘ Bornite | Cu5FeS4 |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
Other Databases
Link to USGS - Alaska: | WI037 |
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Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainDomain
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