|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 0.5 mile southwest of the head of Northeast Cove in Drier Bay at an elevation of about 750 feet. It is located in the SE1/4 section 29, T. 3 N., R. 10 E., of the Seward Meridian. This is location 24 of Condon and Cass (1958), location 108 of Cobb and Richter (1972), location 135 of MacKevett and Holloway (1977), location 226 of Cobb and Tysdal (1980), and location S-53 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionThe prospect is in sheared pillow basalt of the Orca Group of early Tertiary age (Cobb and Tysdal, 1980). The shear zone trends north-south and dips nearly vertically. It contains numerous lenses of chalcopyrite and pyrrhotite that range in width from 2 to 6 inches (Kurtak and Jeske, 1986). A random chip sample was collected across a 2-inch-wide sulfide zone in the upper adit at 750 feet of elevation. It contained 2.6 percent copper and 3.2 ppm silver (Kurtak and Jeske, 1986).
|Geologic map unit||(-147.746448203577, 60.3171340081182)|
|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 30-foot-long adit at the 250-foot elevation, a 390-foot-long adit with a 70-foot-high raise at the 350-foot elevation, and a 68-foot-long adit at 750 feet elevation. Grant and Higgins (1909) indicated that a bunk house and a small wharf were located on the shore. The U.S. Bureau of Mines collected a random chip sample across a 2-inch-wide sulfide zone in the upper adit. It contained 2.6 percent copper and 3.2 ppm silver (Kurtak and Jeske, 1986).|
|Indication of production||None|
|Reserve estimates||The U.S. Bureau of Mines estimated an inferred reserve of 30 tons grading 2.6 percent copper (Kurtak and Jeske, 1986).|
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.
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.
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||11/18/2001|