|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||B-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The occurrence is located in the tidal zone on the east end of Copper Bay, Knight Island. It is in the NW1/4 section 14, T. 2 N., R. 9 E., of the Seward Meridian. This is location 235 of Tysdal (1978 [MF-880-A]) and location S-44 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionNelson and others (1985) mapped the greenstone in this vicinity as Orca Group of early Tertiary age. Greenstone at the occurrence was visually estimated to contain 1 percent chalcopyrite and 1 to 5 percent pyrrhotite (Kurtak and Jeske, 1986). A single random chip sample of greenstone contained 94 ppm copper, 78 ppm zinc, and 0.25 ppm silver (Kurtak and Jeske, 1986).
|Geologic map unit||(-147.850975836437, 60.2672452634429)|
|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||No workings are reported. In the early 1980s, the U.S. Bureau of Mines searched for signs of prospecting but found none. They collected a single random chip sample from mineralized greenstone; it contained 94 ppm copper, 78 ppm zinc, and 0.25 ppm silver (Kurtak and Jeske, 1986).|
|Indication of production||None|
Grant, U.S., and Higgins, D.F., Jr., 1909, Notes on geology and mineral prospects in the vicinity of Seward, Kenai Peninsula: U.S. Geological Survey Bulletin 379-C, p. 98-107.
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.
|Reporters||Jeff A. Huber and Carol S. Huber (Anchorage)|
|Last report date||12/15/2001|