Main commodities | Au |
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Other commodities | Cu; Pb; Zn |
Ore minerals | arsenopyrite; chalcopyrite; galena; gold; pyrite; 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 | 60.0983 |
Longitude | -149.4463 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | The prospect is located in the SE1/4 section 9, T. 1 S., R. 1 W., of the Seward Meridian. It is in the south end of the town of Seward, near the aqueduct outfall. This is location 90a Cobb and Tysdal (1980) and location S-197 and of Jansons and others (1984). This location is accurate to within 300 feet. |
Geologic descriptionThe prospect consists of four adits driven on several quartz-calcite veins within a N50E-striking shear zone. The host rock is slate and sandstone of the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880-A]). Adits were driven at elevations of 10, 70, 120, and 220 feet. The 70-foot-level adit was 100 feet long, and the 120-foot-level adit was 15 feet long. The veins had a maximum width of 3 feet and generally followed jointing. Metallic minerals include arsenopyrite, chalcopyrite, galena, pyrite, and sphalerite; gold is also present (Martin and others, 1915). | |
Geologic map unit | (-149.448443347471, 60.0977373403948) |
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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. |
Workings or exploration | Workings consist of four adits that occur at elevations of 10, 70, 120, and 220 feet. The 70-foot-level adit has a 10-foot-long winze. The lowest adit is 100 feet long, and the 120-foot-level adit is 15 feet long (Martin and others, 1915). No assay results reported are reported in the literature. |
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Indication of production | None |
Additional commentsThe workings have been closed and reclaimed by the City of Seward. |
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 | 12/10/2001 |