|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 at 1,300 feet elevation in a saddle southeast of peak 1995, in the divide that separates the head of Snug Harbor from Montague Strait. It is in the NW1/4 section 16, T. 2 N., R. 10 E., of the Seward Meridian. This is location 238 of Cobb and Tysdal (1980) and location S-40 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
The prospect consists of veins and layers of disseminated sulfides within several hundred feet of brecciated and schistose sheeted dikes of the Orca Group of early Tertiary age (Cobb and Tysdal, 1980). The sulfide minerals are exposed in two open cuts driven along a N 45 E-trending shear zone. The zone dips from vertical to 80 SE (Kurtak and Jeske, 1986). The exposed sulfides consist mainly of disseminated pyrrhotite and chalcopyrite blebs along cleavage planes (Kurtak and Jeske, 1986). Grant and Higgins (1909) examined hand samples from a reported 1- to 4-foot-wide quartz vein on the prospect that contained pyrrhotite and chalcopyrite.A random chip sample from one of the open cuts contained 1.4 percent copper and 20 ppm silver (Kurtak and Jeske, 1986).
|Geologic map unit||(-147.738350019231, 60.2697345382117)|
|Mineral deposit model||Cyprus massive sulfide (Cox and Singer, 1986; model 24a)|
|Mineral deposit model number||24a|
|Age of mineralization||Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age.|
|Alteration of deposit||Basalt is altered to greenstone.|
|Workings or exploration||There are two open cuts on the prospect; their size is unknown. Grant and Higgins (1909) described a 60-foot adit in the area, but the U.S. Bureau of Mines did not find it when they visited the prospect in the early 1980s. A chip sample was collected from the shear zone exposed in one of the open cuts. It contained 1.4 percent copper and 20 ppm silver (Kurtak and Jeske, 1986).|
|Indication of production||None|
Cobb, E.H., and Richter, D.H., 1972, Metallic mineral resources map of the Seward quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-466, 2 sheets, scale 1:250,000.
Cobb, E.H., and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.
Condon, W.H., and Cass, J.T., 1958, Map of a part of the Prince William Sound area, Alaska, showing linear geologic features as shown on aerial photographs: U.S. Geological Survey Miscellaneous Investigations Series Map I-273, 1 sheet, scale 1:125,000.
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.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
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||11/9/2001|