Quadrangle map, 1:250,000-scale | SB |
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Quadrangle map, 1:63,360-scale | A-6 |
Latitude | 55.21 |
Longitude | -159.88 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This occurrence is located on Nagai Island near the point between Northwest Bight and Pirate Shake. The site is 0.3 mile west-northwest of triangulation station Wreck. It is referred to as SBRGX-39 in Wilson and others (1988, locality 13). The location is accurate to within 1,200 feet. |
Geologic descriptionThe country rocks at this site are sedimentary strata of the Lower Cretaceous Shumagin Formation (Wilson and others, 1995). The sedimentary rocks are intruded by a pyritized granodiorite sill. Anomalous values in arsenic, copper, and zinc have been reported both in sedimentary rock and in the intrusive (Wilson and others, 1988). | |
Geologic map unit | (-159.882088807888, 55.2091846304502) |
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Alteration of deposit | Pyritization. |
Workings or exploration | Rock samples 84ACe102a-c collected by the U.S. Geological Survey in the mid-1980s, were reported to be anomalous in arsenic, copper, and zinc (Wilson and others, 1988). |
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Indication of production | None |
Additional commentsThis occurrence is located on lands selected by the Aleut Corporation. |
MRDS Number | 10308217 |
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References | |
Reporters | S.H. Pilcher |
Last report date | 11/4/2000 |