Quadrangle map, 1:250,000-scale | ID |
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Quadrangle map, 1:63,360-scale | A-4 |
Latitude | 62.17327 |
Longitude | -157.96951 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is on a low saddle west of the head of Little Eldorado Creek at an elevation of about 1,050 feet. It is about 0.7 mile north-northwest of hill 1533 and about 0.3 mile north-northwest of the center of section 18, T. 24 N., R. 47 W., of the Seward Meridian. The location is accurate. |
Geologic descriptionThis occurrence is a zone of sericitized granite porphyry that contains quartz veinlets with envelopes of iron-stained alteration. The small granite porphyry body cuts sandstone of the Upper Cretaceous, Kuskokwim Group (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). A grab sample of mineralization contained 240 parts per million (ppm) zinc and 1,800 parts per billion (ppb) mercury (McGimsey and others, 1988). | |
Geologic map unit | (-157.971917354679, 62.172580688139) |
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Mineral deposit model | Polymetallic vein (Cox and Singer, 1986; model 22c). |
Mineral deposit model number | 22c |
Alteration of deposit | Sericitic alteration of granite porphyry; veinlets have envelopes of iron oxide alteration. |
Workings or exploration | Samples were collected by the U.S. Geological Survey and Alaska Division of Geological and Geophysical Surveys in 1986 (McGimsey and others, 1988). |
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Indication of production | None |
References | |
Reporters | T.K. Bundtzen (Pacific Rim Geological Consulting, Inc.), M.L. Miller (U.S. Geological Survey); and C.C. Hawley (Hawley Resource Group) |
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Last report date | 5/25/2003 |