|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||D-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is located at an elevation of 700 feet, just east of the foot of Learnard Glacier. It is in the NE1/4 section 15, T. 8 N., R. 4 E., of the Seward Meridian. This is location 134 of Condon and Cass (1958), location 92 of MacKevett and Holloway (1977), location 143 of Cobb and Tysdal (1980), and location SR-176 of Jansons and others (1984). This location is accurate to within a quarter of a mile.|
Geologic descriptionThis occurrence is one of numerous quartz veins in the general area that are hosted in slate and sandstone of the Upper Cretaceous Valdez Group (Cobb and Tysdal, 1980). The vein is exposed for about 100 feet along strike and ranges in width from 3 to 12 inches. It is approximately parallel to the north to N20E strike of the host rock and has a vertical dip (Jansons and others, 1984). According to Johnson (1914[B 592-G, p. 234]), the vein contains arsenopyrite, pyrite, chalcopyrite, galena, and gold. Samples of float assayed by the U.S. Bureau of Mines contained trace amounts of antimony, gold, and silver (Hoekzema and Sherman, 1983).
|Geologic map unit||(-148.724034653704, 60.7870353267486)|
|Mineral deposit model||Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.|
|Workings or exploration||Samples of float assayed by the U.S. Bureau of Mines contained trace amounts of antimony, gold, and silver (Jansons and others, 1984).|
|Indication of production||None|
Barnes, F.F., 1943, Geology of the Portage Pass area, Alaska: U.S. Geological Survey Bulletin 926-D, p. 211-235.
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.
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., 1914, The Port Wells gold-lode district, Alaska: U.S. Geological Survey Bulletin 592-G, p. 195-236.
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.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||12/6/1999|