|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||B-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The prospect is located in the SE1/4 section 29, T. 3 N., R. 7 E., of the Seward Meridian. It is situated at an elevation of about 770 feet on the south side of Jackpot Bay about one-quarter mile from the beach. This is location 121 of Cobb and Richter (1972), location 110 of MacKevett and Holloway (1977), location 174 of Cobb and Tysdal (1980), and location S-91 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
The prospect consists of a single, 20- to 28-inch-wide, mineralized quartz vein. The center of the vein is a 6- to 11-inch-wide zone of massive to semi-massive sulfide minerals consisting of arsenopyrite, galena, pyrite, sphalerite, and gold (Grant and Higgins, 1909). The vein strikes N 52 W and dips 67 W; it is exposed for about 15 feet (Grant and Higgins, 1909). The bedrock in this area slate and graywacke of the Orca Group of early Tertiary age (Nelson and others, 1985).An 8-foot-long open cut was driven on the vein in 1908. Six samples were collected from the open cut; three were taken across the outer part of the vein, and three were taken across the central sulfide zone. Assays of the outer quartz zone averaged 0.5 ounce of gold per ton, and the inner sulfide zone averaged 2.5 ounces of gold per ton (Grant and Higgins, 1909).
|Geologic map unit||(-148.266028348159, 60.3192364970634)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Tertiary or younger; the occurrence is in rocks of the Orca Group of Tertiary age.|
|Workings or exploration||
An 8-foot-long open cut was driven on the vein in 1908. Six samples were collected from the open cut; three were taken across the outer part of the vein, and three were taken across the central sulfide zone. Assays of the outer quartz zone averaged 0.5 ounce of gold per ton, and the inner sulfide zone averaged 2.5 ounces of gold per ton (Grant and Higgins, 1909).The U.S. Bureau of Mines visited the site in the early 1980s but failed to locate any workings. They collected a random chip sample, a grab sample of quartz float, and two stream silt samples. The highest gold value was 0.09 ppm from a stream sample (Kurtak and Jeske, 1986).
|Indication of production||Undetermined|
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 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.
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.
Grant, U.S., and Higgins, D.F., Jr., 1910, Reconnaissance of the geology and mineral resources of Prince William Sound, Alaska: U.S. Geological Survey Bulletin 443, 89 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., 1914, The Port Wells gold-lode district, Alaska: U.S. Geological Survey Bulletin 592-G, p. 195-236.
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||12/7/2000|