Main commodities | Au |
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Other commodities | Cr |
Ore minerals | unspecified sulfide mineral |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | SM |
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Quadrangle map, 1:63,360-scale | C-7 |
Latitude | 61.6437 |
Longitude | -158.48391 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is on a west-facing slope about 0.5 mile west of hill 1379. It is at an elevation of about 750 feet in the SW1/4 sec. 14, T. 18 N., R. 51 W., of the Seward Meridian. The location is accurate. |
Geologic descriptionThis occurrence consists of a chalcedony-cemented breccia in a flow of fine-grained, dark gray basalt or basaltic andesite (Bundtzen and others, 1998). The breccia contains 1-2 percent, finely disseminated sulfides in both quartz veinlets and in mafic volcanic rock. One grab sample contained 880 parts per billion gold and 200 parts per million chromium (Bundtzen and others, 1998). The elevated chromium probably represent the background of the host rocks. | |
Geologic map unit | (-158.486284301951, 61.6429932285353) |
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Alteration of deposit | Chalcedony. |
Workings or exploration | Surface sampling was conducted by the Alaska Division of Geological and Geophysical Surveys in 1992 (Bundtzen and others, 1998). |
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Indication of production | None |
References | |
Reporters | T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.) and M.L. Miller (U.S. Geological Survey) |
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Last report date | 5/8/2003 |