Main commodities | Cu |
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Other commodities | Ag; Au |
Ore minerals | chalcopyrite |
Quadrangle map, 1:250,000-scale | KR |
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Quadrangle map, 1:63,360-scale | D-6 |
Latitude | 57.8 |
Longitude | -155.7 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This site is located approximately 4 miles west of Puale Bay in T. 28 S., R. 39 W., of the Seward Meridian (Berg and Cobb, 1967, figure 1, locality 1; Cobb, 1972, MF 459, locality 1; MacKevett and Holloway, 1977, locality 1; Church and others, 1989, MF 1539 I, locality 8). This site location is accurate to within several miles. |
Geologic descriptionBerg and Cobb (1967, p. 7) report that in 1920 samples were collected from chalcopyrite lenses which could be traced for 1 mile. Two samples assayed up to 0.31 ounce per ton gold, 8.1 ounces per ton silver, and 24.4 percent copper. Bedrock in this area consists of Upper Jurassic to Lower Cretaceous sedimentary units of the Naknek formation. The deposit type is unknown but may be a polymetallic vein controlled by a contact zone of an unmapped dike or sill. | |
Geologic map unit | (-155.702096039606, 57.7992925255936) |
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Mineral deposit model | Polymetallic vein? (Cox and Singer, 1986; model 22c?). |
Mineral deposit model number | 22c? |
Workings or exploration | Samples collected and analyzed. |
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Indication of production | None |
Additional commentsThis site is located within Becharof Natural Wildlife Refuge. |
MRDS Number | A012459 |
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ReferencesU.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).
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Reporters | S.H. Pilcher (Anchorage) |
Last report date | 8/16/1998 |