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Unnamed Occurrence (ARDF - WI033; near the head of Colorado Creek), Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
67° 21' 40'' North , 152° 39' 14'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is about 3 miles east of the junction of Colorado and Mettenpherg Creeks. The occurrence is at an elevation of about 1,160 meters, about 0.3 mile north of the center of section 3, T. 29 N., R. 23 W., of the Fairbanks Meridian. The occurrence is the site of sample 228 in Dillon and others (1981 [AOF 133]). The location is accurate.
Geology: This occurrence consists of mineralized, calcareous, biotite-quartz-chlorite-albite schist probably derived from intermediate meta-igneous rock (Dillon and others, 1981 [AOF 133B]). A grab sample contains 100 ppm silver, more than 20,000 ppm copper, 100 ppm bismuth, and 5,000 ppm manganese. No sulfides are noted in the sample description. The rocks in the area are Proterozoic(?) banded schist (Dillon and others, 1986). No other information is available.
Workings: Only surface sampling.
Commodities (Major) - Ag, Cu; (Minor) - Bi, 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: | WI033 |
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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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