Quadrangle map, 1:250,000-scale | TK |
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Quadrangle map, 1:63,360-scale | B-4 |
Latitude | 62.3272 |
Longitude | -148.8189 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is at an elevation of about 4,700 feet on the west side of a south tributary to the upper East Fork, Iron Creek. It is about 0.1 mile south-southwest of the center of sec. 24, T. 26 N., R. 3 E., Seward Meridian. The location is accurate within 1/2 mile. This is locality 65 of Csejtey and Miller (1978) and locality 65 of Singer and others (1978). |
Geologic descriptionThe rocks in the area of this occurrence includes Tertiary felsic and mafic, subaerial volcanic rocks and related shallow intrusions (Csejtey and others, 1978). Nearby, at a lower elevation, a Jurassic plutonic and metamorphic assemblage is mainly of quartz diorite, granodiorite, amphibolite, and greenschist. The occurrence is a malachite-stained, pyrite-bearing quartz vein that cuts probable Tertiary, volcanic rock. A float sample contains 1,500 parts per million copper and detectable (but less than 10 parts per million) tin (Miller and others, 1978). | |
Geologic map unit | (-148.821112745566, 62.3267082877091) |
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Age of mineralization | Probably Tertiary or younger. |
Alteration of deposit | Malachite staining. |
Workings or exploration | Only surface sampling by the U.S. Geological Survey (Miller and others, 1978). |
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Indication of production | None |
MRDS Number | A012182 |
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References | |
Reporters | D. Bickerstaff (U.S. Geological Survey) |
Last report date | 10/1/2002 |