|Quadrangle map, 1:250,000-scale||SR|
|Quadrangle map, 1:63,360-scale||C-4|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The prospect is located in the SE1/4 section 34, T. 8 N., R. 7 E., of the Seward Meridian. It is at an elevation of 725 feet on the east side of Culross Passage about one mile southwest of the head of Culross Bay. This is location 107 of MacKevett and Holloway (1977), location 170 of Cobb and Tysdal (1980), and location S-103 of Jansons and others (1984). Cobb and Tysdal (1980) summarized the relevant references under the name Sells. This location is accurate to within 300 feet.|
The mine is in the Contact Fault zone; this major thrust fault juxtaposes the Valdez Group of Late Cretaceous age with the Orca Group of Tertiary age. The Contact Fault zone formed 65 million to 35 million years ago and ranges from 1 to 6 miles wide. Within this zone are numerous discrete shears. The general trend of the Contact Fault is northeast, but the strike of individual shears may vary widely (Nockleberg and others, 1994).
The country rock at the prospect consists of Valdez Group schistose sandy slate that strikes S30W and dips 80W (Cobb and Tysdal, 1980). The deposit consists of closely grouped quartz lenses and stringers that parallel the schistosity of the country rock in strike and dip. The width of the quartz lenses ranges from 4 to 59 inches, and the maximum exposed length of any lens or stringer is about 15 feet. The area of quartz veins is about 200 feet in length and has an apparent width of at least 15 feet (Johnson, 1914 [B 592-G, p. 236]).The workings on this prospect consist of a single 100-foot adit, a 15-foot-long open cut, and several prospect pits. The U.S. Bureau of Mines collected 11 samples that contained less than 0.005 ounce of gold per ton. Other results included a 9-foot-wide chip sample containing 0.086 ounce of gold per ton and a 2-foot-wide chip sample of a quartz vein containing 0.374 ounce of gold per ton (Jansons and others, 1984). There is no reported production, although a test shipment of ore was made (Johnson, 1918 [B 662-C, p. 183-192]).
|Geologic map unit||(-148.202559955203, 60.7340922529687)|
|Mineral deposit model||Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)|
|Mineral deposit model number||36a|
|Age of mineralization||Eocene or younger; the Contact Fault zone cuts Eocene granite north of this prospect.|
|Workings or exploration||The workings on this mine consist of a single 100-foot adit, a 15-foot-long open cut, and several prospect pits. The U.S. Bureau of Mines collected 11 samples that contained less than 0.005 ounce of gold per ton, including a 9-foot-wide chip sample containing 0.086 ounce of gold per ton and a 2-foot-wide chip sample of a quartz vein containing 0.374 ounce of gold per ton (Jansons and others, 1984). There was no reported production, although a test shipment of ore was made (Johnson, 1918 [B 662-C, p. 183-192]).|
|Indication of production||Yes; small|
|Reserve estimates||The U.S. Bureau of Mines estimated a geologic resource of 180 tons at 0.05 ounce of gold per ton (Jansons and others, 1984).|
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.
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.
Johnson, B.L., 1918, Mining on Prince William Sound: U.S. Geological Survey Bulletin 662-C, p. 183-192.
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.
Nokleberg, W.J., Plakfer, George, and Wilson, F.H., 1994, Geology of south-central Alaska, p. 311-366, in Plafker, George, and Berg, H.C., eds., The geology of Alaska: Geological Society of America DNAG, The geology of North America, v. G-1.
|Reporters||Jeff A. Huber (Anchorage)|
|Last report date||2/11/2000|