Main commodities | Cu; Pb; Zn |
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Other commodities | Au |
Ore minerals | chalcopyrite; galena; pyrite; sphalerite |
Gangue minerals | quartz |
Quadrangle map, 1:250,000-scale | SI |
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Quadrangle map, 1:63,360-scale | D-7 |
Latitude | 57.8436 |
Longitude | -136.2592 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | This prospect is at an elevation of about 1,500 feet, about 1.2 miles east of Lake Elfendahl and 0.6 mile north-northeast of the 2,605-foot peak of Mount Fritz. The prospect is just east of an unnamed lake in the NE1/4 sec. 36, T. 46 S., R. 56 E. It is location P-43 of Bittenbender and others (1999), location 14 of Cobb (1972, 1978), and MAS no. 0021140054 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.5 mile. |
Geologic descriptionJohnson and Karl (1985) map the rocks in the area of this prospect as Triassic greenstone intruded by Tertiary(?) granodiorite. The rocks are cut by high-angle faults that mainly strike northwest; the most prominent is the regional-scale Border Ranges Fault whose trace is about a mile southwest of the prospect. Cobb (1972, 1978), citing Rossman (1959), describes the prospect as a small quartz vein that contains pyrite, chalcopyrite, sphalerite, and galena. The vein is in a fault near the contact between greenstone and diorite. There are no assay data but Rossman speculated that the vein also contains gold. | |
Geologic map unit | (-136.261031792644, 57.843220256451) |
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Mineral deposit model | Polymetallic vein (Cox and Singer, 1986; model 22c). |
Mineral deposit model number | 22c |
Indication of production | Undetermined |
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Additional commentsThe prospect is in West Chichagof-Yakobi Wilderness. |
MRDS Number | A013250 |
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ReferencesBittenbender, P., Still, J.C., Maas, K., and McDonald, M., Jr., 1999, Mineral resources of the Chichagof and Baranof Islands area, southeast Alaska: Bureau of Land Management, BLM-Alaska Technical Report 19, 222 p.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
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Reporters | H.C. Berg (U.S. Geological Survey) |
Last report date | 10/16/2004 |