|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The prospect is located in the SW1/4 section 30, T. 2 N., R. 10 E., of the Seward Meridian. It is located on the northeast shore of Mummy Bay within 100 feet of the shoreline. This is location 115 of Cobb and Richter (1972), location 143 of MacKevett and Holloway (1977), location 246 of Cobb and Tysdal (1980), and location S-33 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
The deposit is hosted in a shear zone that is 3 meters wide and exposed along strike for 500 feet. The zone cuts greenstone and sedimentary rock of the Orca Group of early Tertiary age (Cobb and Tysdal, 1980). It is semi-concordant to bedding; it trends N 20 E and dips 75 W (Cobb and Tysdal, 1980). The mineralization is confined to sheared sandstone lenses in greenstone that displays pillow textures and contains basaltic dikes. Lenses of massive sulfides are as much as 10 inches wide by 10 feet long and contain pyrite and chalcopyrite along with traces of cubanite.The U.S. Bureau of Mines collected a 4-foot chip sample from across the prospect pit. It contained 17.6 percent copper (Kurtak and Jeske, 1986). No other assay results are reported.
|Geologic map unit||(-147.789559422236, 60.2315357619582)|
|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.|
|Workings or exploration||
Workings on the prospect consist of a 10-foot- by 30-foot prospect pit from which Grant and Higgins (1909) indicated a few tons of ore had been shipped. A short adit was driven to crosscut the shear zone (Johnson, 1918 [B 662-C, p. 219]).The U.S. Bureau of Mines collected a 4-foot chip sample across the prospect pit. It contained 17.6 percent copper ( Kurtak and Jeske, 1986). No other assay results reported.
|Indication of production||Undetermined|
|Production notes||A few tons of ore was reported shipped, but there is no record in the literature of the amount of copper and zinc it contained (Grant and Higgins, 1909).|
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.
Hoekzema, 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.
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.
Johnson, B.L., 1918, Copper deposits of the Latouche and Knight Island districts, Prince William Sound: U.S. Geological Survey BuIletin 662-C, p. 193-220.
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.
Moffit, F.H., and Fellows, R.E., 1950, Coper deposits of the Prince William Sound district, Alaska: U.S. Geological Survey Bulletin 963-B, p. 47-80.
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||10/20/2000|