Main commodities | Au |
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Other commodities | Cu; Pb; Zn |
Ore minerals | arsenopyrite; chalcopyrite; galena; gold; pyrite; pyrrhotite; sphalerite |
Gangue minerals | calcite; quartz |
Quadrangle map, 1:250,000-scale | SR |
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Quadrangle map, 1:63,360-scale | A-7 |
Latitude | 60.2092 |
Longitude | -149.3918 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The prospect is located on Lost Creek at an elevation of 700 feet about 1.25 miles west of Bear Lake. It is in the NE1/4 section 2, T. 1 N., R. 1 W., of the Seward Meridian. This is location 85 of Cobb and Tysdal (1980) and location S-203 of Jansons and others (1984). This location is accurate to within 300 feet. |
Geologic descriptionThe prospect consists of iron-stained stringers and lenses of quartz-calcite-sulfide veins that carry arsenopyrite, galena, and sphalerite. The veins are hosted in sheared slate of the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880-A]). The shear zone strikes northeast and dips vertically. Workings consist of 450 feet of underground work and considerable surface stripping (Brooks, 1913). No assay results are reported in the literature. | |
Geologic map unit | (-149.393951165321, 60.2086403730133) |
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Mineral deposit model | Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a) |
Mineral deposit model number | 36a |
Age of mineralization | Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age. |
Alteration of deposit | Veins are iron-stained. |
Workings or exploration | There are 450 feet of underground workings and considerable surface stripping (Brooks, 1913). No assay results are reported in the literature. |
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Indication of production | None |
Additional commentsThis prospect could be an extension of the Brewer Alaska prospect, SR278. |
ReferencesHoekzema, R.P., and Sherman, G.E., 1983, Mineral investigations in the Chugach National Forest, Alaska (Peninsula study area): U.S. Bureau of Mines in-house report; held at U.S. Bureau of Land Management Alaska State Office, Anchorage, 524 p.
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Reporters | Jeff A. Huber and Carol S. Huber (Anchorage) |
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Last report date | 12/7/2001 |