|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-7|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The mine is located in the SE1/4 section 25, T. 10 N., R. 1 W., of the Seward Meridian. It is at Bird Point, but the site is at or below current sea level as a result of the 1964 earthquake. This is location 2 of Cobb and Richter (1972), location 2 of MacKevett and Holloway (1977), location 2 of Cobb and Tysdal (1980), and location S-316 of Jansons and others (1984). The location is accurate to within a quarter of a mile. Cobb and Tysdal (1980) summarized the relevant references under the name Bird Point.|
This deposit consists of an auriferous, sulfide-bearing quartz-calcite vein in graywacke and slate of the Valdez Group of Late Cretaceous age (Johnson, 1916; Nelson and others, 1985). The vein is 2 to 16 inches wide; it strikes N28E and dips near vertically, parallel to the bedding of the graywacke and slate. Metallic minerals in the vein consist of chalcopyrite, galena, pyrite, sphalerite, and gold. Workings on the prospect consisted of a 22-foot shaft that is now below sea level.A test shipment of 4,200 pounds of ore was shipped to the Tacoma smelter in 1912. This shipment contained 2.6 ounces of gold (Johnson, 1916). The U.S. Bureau of Mines visited this site in 1981and collected a grab sample from the dump that contained 0.28 ounce of gold per ton and 0.06 ounce of silver per ton (Jansons and others, 1984).
|Geologic map unit||(-149.361776996816, 60.9278490858835)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Cretaceous or younger; the vein cuts rocks of the Valdez Group of Late Cretaceous age.|
|Workings or exploration||A 22-foot shaft was sunk in 1912, and a test shipment of 4,200 pounds of ore was shipped. This shipment yielded 2.6 ounces of gold (Johnson, 1916). The U.S. Bureau of Mines visited this site in 1981 and collected a grab sample from the dump that contained 0.28 ounce of gold per ton and 0.06 ounce of silver per ton (Jansons and others, 1984).|
|Indication of production||Yes; small|
|Production notes||A mill test in 1912 of 4,200 pounds of ore yielded 2.6 ounces of gold.|
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Brooks, A.H., 1913, Mineral resources of Alaska, report on progress of investigations in 1912: U.S. Geological Survey Bulletin 542, 308 p.
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.
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., 1916, Mining on Prince William Sound: U.S. Geological Survey Bulletin 642-D, p. 137-145.
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 (Anchorage)|
|Last report date||4/8/2000|