Unnamed Occurrence (ARDF - WI042; northeast of Ernie Lake), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - WI042; northeast of Ernie Lake) | - 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° 24' 43'' North , 152° 52' 26'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201920
Long-form identifier:
mindat:1:2:201920:1
GUID (UUID V4):
bce17b82-f002-4b2e-b3d0-02451cafb95d
Location: This occurrence is about 3 miles northeast of Ernie Lake. It is at an elevation of about 1,240 meters, about 0.4 mile east-northeast of the center of section 22, T. 30 N., R. 24 W., of the Fairbanks Meridian. The occurrence is the site of sample 57 of Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: This occurrence consists of magnetite, sphalerite, and pyrite in dark green tactite at the contact of a granite pluton (Dillon and others, 1981 [AOF 133B]). A grab sample from an outcrop of the tactite contains 500 ppm zinc and more than 20% iron. The rocks in the area are mainly Proterozoic(?) granitic rocks, but there is none at this occurrence.
Workings: Only surface sampling.
Commodities (Major) - Zn; (Minor) - Fe
Development Status: None
Deposit Model: Fe skarn (?) (Cox and Singer, 1986; model 18d)
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
3 valid minerals.
Detailed Mineral List:
ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
ⓘ Pyrite Formula: FeS2 |
ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Magnetite | Fe2+Fe23+O4 |
S | Sulfur | |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Sphalerite | ZnS |
Fe | Iron | |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Fe | ⓘ Pyrite | FeS2 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
Other Databases
Link to USGS - Alaska: | WI042 |
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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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