Main commodities | Ag; As; Au |
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Other commodities | Bi; Cu; Sb; Zn |
Ore minerals | arsenopyrite; chalcopyrite; sphalerite |
Quadrangle map, 1:250,000-scale | WI |
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Quadrangle map, 1:63,360-scale | A-4 |
Latitude | 67.2451 |
Longitude | -151.5814 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 3,300 feet about 2.0 miles west-northwest of the top of Gilroy Mountain. The site corresponds to the location of samples 50 and 51 in Dillon and others (1981). The location is accurate. |
Geologic descriptionThis occurrence consist of a stockworks of small sulfide veins in marble (Dillon and others, 1981 [AOF 133B]). They collected two grab samples. A fine-grained actinolite marble contains narrow veins of chalcopyrite and sphalerite; a gray marble contains veins of arsenopyrite, sphalerite, and traces of chalcopyrite. The arsenopyrite veins were as much as 10 cm thick. The arsenopyrite-bearing sample contains 10 ppm silver, 10% arsenic, 15 ppm gold, 50 ppm bismuth, and 300 ppm antimony. The other sample contained no anomalous metal values. The rocks in the area are mainly Devonian, Ambler metavolcanic rocks (Dillon and others, 1986). | |
Geologic map unit | (-151.584130785595, 67.244642326395) |
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Mineral deposit model | Polymetallic vein? (Cox and Singer, 1986; model 22c?). |
Mineral deposit model number | 22c? |
Workings or exploration | Only surface sampling. |
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Indication of production | None |
MRDS Number | A011963 |
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References | |
Reporters | J.M. Britton (Anchorage) |
Last report date | 8/9/2002 |