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Unnamed Occurrence (ARDF - BH004; north end of Greenstone Ridge), Aniak Mining District, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - BH004; north end of Greenstone Ridge) | - not defined - |
| Aniak Mining District | Mining District |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
60° 29' 23'' North , 160° 11' 24'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This lode prospect is on the north end of Greenstone Ridge, about 3/4 mile southwest of Golden Gate Falls on the Kisaralik River. It is approximately located, perhaps within 1/2 mile. It is locality 1 of Cobb (1972 [MF 455]) and of Hoare and Cobb (1977).
Geology: Hoare and Coonrad (1959) reported traces of copper minerals in a fault zone in green amphibole schist derived from Jurassic mafic volcanic rocks. It appears that this site is along or near the high-angle reverse fault mapped along the west side of Greenstone Ridge (Box and others, 1993). Hoare and Cobb (1977, p. 16) note that this occurrence may also have been referred to in the literature under the names Golden Butte Mines, Inc., Rigagalik River, and Royal Quartz Mines. The Golden Butte Mines occurrence is reported to be quartz veins carrying some gold that were traceable for several hundred feet (Smith, 1932, B 824, p. 22). The Royal Quartz occurrence was reported to be in slate intruded by grainitic rocks, and to consist of shear zones with quartz veins that contained Sb, Au, and Ag (Brooks, 1912, p. 35). Geologically, neither the Royal Quartz or the Golden Butte Mines occurrences appears to be the same one as at this locality; they apparently were not located by Cobb (1972 [MF 455]) or Hoare and Cobb (1977). The Rigagalik River occurrence in the upper part of the Kisaralik River is described in a separate record (BH021).
Workings: Limited surface observations appear to be the extent of activity at this locality.
Age: Not known; postdates host Jurassic volcanic rocks.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Copper-bearing minerals in fault zone.
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Rock Types Recorded
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Alphabetical List Tree DiagramList of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | BH004 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-Kilbuck DomainDomain
- Koyukuk ArcsVolcanic Arc
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