|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The prospect is located near tidewater on the east shore of Marsha Bay. It is in the SW1/4 section 14, T. 3 N., R. 10 E., of the Seward Meridian. This is location 214 of Tysdal (1978 [MF-880-A]) and location S-66 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionThe prospect consists of a 3-foot-wide mineralized dike that crosscuts sheared greenstone and chert of the Orca Group (Richter, 1965). The age of the dike is unknown. The dike contains disseminated pyrrhotite, pyrite, and chalcopyrite. Three samples of sheared greenstone and two of a basalt dike contained from 65 to 150 ppm copper and from 63 to 130 ppm zinc (Kurtak and Jeske, 1986).
|Geologic map unit||(-147.676591957856, 60.3448926441907)|
|Mineral deposit model||Cyprus massive sulfide (Cox and Singer, 1986; model 24a)|
|Mineral deposit model number||24a|
|Age of mineralization||Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.|
|Workings or exploration||Richter (1965) reported a small prospect pit, but it was not located by the U.S. Bureau of Mines when they investigated the prospect in the early 1980s. Three samples of sheared greenstone and two of a basalt dike contained from 65 to 150 ppm copper and from 63 to 130 ppm zinc (Kurtak and Jeske, 1986).|
|Indication of production||None|
Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, southcentral Alaska: U.S. Bureau of Mines Mineral Land Assessment 5-84, 218 p., 2 sheets, scale 1:250,000.
Kurtak, J.M., and Jeske, R.E., 1986, Mineral investigations in the Chugach National Forest, Alaska (Islands area): U.S. Bureau of Mines Open-File Report 54-86, 302 p., 1 sheet, scale 1:63,360.
Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.
Richter, D.H., 1965, Geology and mineral deposits of central Knight Island, Prince William Sound, Alaska: Alaska Division of Mines and Minerals Geologic Report 16, 40 p., 1 sheet, scale 1:40,000.
|Reporters||Jeff A. Huber and Carol S. Huber (Anchorage)|
|Last report date||12/6/2001|