|Current site name||Unnamed (Gulf of Alaska beaches, Yakutat quadrangle segment)|
|Geographic coordinates:||-139.62224, 59.44968 (WGS84)|
|Relative position||This site is the segment of the Gulf of Alaska beach placer system that exists on the Yakutat quadrangle. The coordinates are the approximate center of the beach in the quadrangle. The beach extends from 141. 0 longitude and 59.753 latitude at the west edge of the quadrangle to 138.16 longitude and 59.0 latitude where the Yakatut quadrangle abuts the Mt. Fairweather quadrangle. West of Yakutat, the beach placer is interrupted by Yakutat Bay, about 18 miles wide at its mouth. Beach placers occur within Yakutat Bay on the west side of Khantaak Island (YA003) and on the west facing Logan Beach (YA004) near the head of Yakutat Bay. The Yakutat segment includes the Akwe (YA006), Situk (YA007), Blacksand (YA008), also Blacksand Island (YA009) beach placers, all of which have been described separately here and by Cobb (1972). Data on the Logan, Khantaak, Yakutat, Blacksand, Blacksand Island, and Akwe beach placers are also summarized by MacKevett and Holloway (1977, p. 84; also map 77-169A).|
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|Materials||Type of material|
|USGS model code||39a|
|BC deposit profile||C01. C02|
|Deposit model name||Placer Au-PGE|
|Mark3 model number||54|
|Development status||Past Producer|
|Agency||Database name||Acronym||Record ID||Notes|
|USGS||Alaska Resource Data File||ARDF||YA001|
Schrader, F.C., and Spencer, A.C., 1901, The geology and mineral resources of a portion of the Copper River district, Alaska: U.S. Geological Survey Special Publication, 94 p.
Brooks, A.H., 1904, Placer mining in Alaska in 1903: U.S. Geological Survey Bulletin 225, p. 43-59.
Tarr, R.S., 1906, The Yakutat Bay region: U.S. Geological Survey Bulletin 284, p. 61-64.
Blackwelder, Eliot, 1907, Reconnaissance on the Pacific Coast from Yakutat to Alsek River: U.S. Geological Survey Bulletin 314, p. 82-88.
Tarr, R.S., 1909, Physiography and glacial geology, in Tarr, R. S. and Butler, B. S, The Yakutat Bay region, Alaska: U.S. Geological Survey Professional Paper 64, p. 11-144.
Tarr, R.S., and Butler, B.S., 1909, Area geology, in Tarr, R. S. and Butler, B. S, The Yakutat Bay region, Alaska: U.S. Geological Survey Professional Paper 64, p. 145-178.
Brooks, A.H., 1918, Mineral resources of Alaska, 1916: U.S. Geological Survey Bulletin 662, 469 p.
Brooks, A.H., 1923, The Alaska mining industry in 1921: U.S. Geological Survey Bulletin 739, p. 1-50.
Miller, D. J., 1961, Geology of the Lituya district, Alaska, Gulf of Alaska Tertiary Province, Alaska: U.S. Geological Survey Open-File Report 210, 1 map, scale 1:96,000.
Thomas, B.I., and Berryhill, R. V., 1962, Reconnaissance studies of Alaskan beach sands, eastern Gulf of Alaska: U.S. Bureau of Mines Report of Investigations 5986, 40 p.
Plafker, George, and Miller, D. J., 1957, Reconnaissance geology of the Malaspina district, Alaska: U.S. Geological Survey Oil and Gas Investigations Map OM-189, 1 sheet, scale 1:125,000
Plafker, George, and Miller, D. J., 1958, Glacial features and surficial deposits of the Malaspina district, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-271, 1 sheet, scale 1:125,000
Johnson, G.R. and Plafker, George, 1969, Preliminary geologic interpretation of aeromagnetic data in the Yakutat district, Alaska: U.S. Geological Survey Open-File Report 379, 10 p.
Wright, F.F., 1969, Sedimentation and gold distribution, Yakutat Bay, Alaska: University of Alaska Marine Science Report R69-9, 12p.
Wright, F.F., 1972, Marine geology of Yakutat Bay, Alaska: U.S. Geological Survey Professional Paper 800-B, p. B9-B15.
MacKevett, E.M., Jr., and Plafker, G., 1970, Geochemical and geophysical reconnaissance of parts of the Yakutat and Mount St. Elias quadrangles, Alaska: U.S. Geological Survey Bulletin 1312-L, 12 p.
Reimnitz, Erk, and Plafker, George, 1976, Marine gold placers along the Gulf of Alaska margin: U.S. Geological Survey Bulletin 1415, 16 p.
Hudson, T.L., Plafker, George, and Lanphere, M. A., 1977, Intrusive rocks of the Yakutat-St. Elias area, south-central Alaska: U.S. Geological Survey Journal of Research, v. 5, no. 2, p. 155-172.
Hudson, T.L., Plafker, George, and Turner, D. L., 1977, Metamorphic rocks of the Yakutat-St. Elias Area, South-central Alaska: U.S. Geological Survey Journal of Research, v. 5, no. 2, p. 173-184.
Clifton, H.E., and Luepke, G., 1987, Heavy-mineral placer deposits of the continental margin of Alaska and the Pacific Coast States, in Geology and resource potential of the continental margin of western North America and adjacent ocean basins, Beaufort Sea to Baja California: Circum-Pacific Council for Energy and Mineral Resources, Earth Science Series, v. 6, p. 691-738.
Foley, J.Y., Burns, L.E., Schneider, C.L., and Forbes, R.B., 1989, Preliminary report of platinum group element occurrences in Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 89-20, 32 p., 1 map sheet, scale 1:2,500,000.
Foley, J.Y., La Berge, R.D., Grosz, A.E., Oliver, F.S., and Hirt, W.C., 1995, Onshore titanium and related heavy mineral investigations in the eastern Gulf of Alaska region, southern Alaska: U.S. Bureau of Mines Open-File Report 10-95, 125 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Yakutat quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-408, 1 sheet, scale 1:250,000.
Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.
Cook, D.J., 1969, Heavy minerals in Alaskan beach sand deposits: University of Alaska, Mineral Industry Research Laboratory Report 20, 114 p.
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.
|Subject category||Comment text|
|Deposit||Model Name = High-energy beach sand deposits derived from steep upland terrane.|
|Deposit||Other Comments = the titanium resource is relatively low grade and consists mostly of ilmenite rather than rutile. The placer deposits were formed by high-energy single pass systems rather than by complex transgressions and regressions that produced the rutile-based titanium placers characteristic of beach placers derived from the erosion of stable regions. Nevertheless, the resources are significant, and could be important if the high-titanium placer deposits are depleted. Clifton and Luepke (1987) have studied the Yakutat beach placers as part of their comprehensive study of the Pacific beach placers from Alaska to Baja California.. Other minerals and metals, such as gold and PGEs will add value, as could garnet, now not considered as a valuable mineral. Large-scale mining might also produce tungsten (scheelite), REEs (from monazite), and chromite. Some of the gold and PGEs and other valuable minerals are very fine-grained; Cook (1969) has studied flotation and ultrafine|
|Deposit||Other Comments = gravity techniques on the recovery of the fine-grained minerals.. The offshore potential is essentially unevaluated. Equipment used for operations offshore, as well as those on the modern beach, needs to be able to withstand, or move quickly from the paths, of major storms.. Some of the deposits, as those in Wrangell-St. Elias National Park, the Logan Beach in the Russell Fiord Wilderness area, and those southeast of Dry Bay in Glacier Bay National Park and Preserve are withdrawn from mineral entry. Placer deposits northwest of Dry Bay, extending westerly to past Yakatut, are in non-wilderness Tongass National Forest or on native-owned lands and might be developed.|
|Reporter||04-FEB-99||Hawley, C.C.||Hawley Resource Group|