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Unnamed Occurrence (ARDF - WI071; in headwater fork of Crevice Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
67° 23' 45'' North , 151° 40' 44'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is on the divide at the head of the northern, headwater fork of Crevice Creek, and about 5 miles south-southwest of the south end of Wild Lake. The occurrence is at an elevation of about 4,000 feet, about 0.4 5 mile east-northeast of the center of section 25, T. 30 N., R. 19 W., of the Fairbanks Meridian. This occurrence is the site of sample 372 in Dillon and others (1981 [AOF 133B]). The location is accurate.
Geology: Dillon and others (1981 [AOF 133B]) collected a float sample of scoriaceous ferricrete at this location. The sample contains 2,000 ppm copper, 3,000 ppm arsenic, 5000 ppm manganese, and 20% iron. The ferricrete float covers an area of about 3 square meters and probably represents a weathered product of the underlying rocks. The occurrence is near the thrust contact between Devonian, Hunt Fork Shale and a unit of Devonian black calcareous phyllite and thin, dark limestone (Dillon and others, 1986).
Workings: Only surface sampling.
Commodities (Major) - As, Cu; (Minor) - Fe, Mn
Development Status: None
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | WI071 |
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Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainVolcanic Arc
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