|Quadrangle map, 1:250,000-scale||DN|
|Quadrangle map, 1:63,360-scale||C-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||
The Galena mine (Cobb, 1980 [OFR 80-363]) is on the southwest end of Quigley Ridge between elevations of about 2050 and 2300 feet. The patented Galena claim abuts the Frances claim to the east.. The main mine workings are in the SW1/4 SW1/4 section 12, T. 16 S., R. 18 W., Fairbanks Meridian. The location is accurate within 300 feet.The mine site corresponds to number 8 of Cobb (1972 [MF 366]), 6 of MacKevett and Holloway (1977), 16 of Bundtzen, Smith, and Tosdal (1976), 20 of Bundtzen (1981), and 27 of Thornsberry, Smith, and Tosdal (1984). Its relation to nearby patented and unpatented claims in force in about 1960 is shown in Hawley and Associates (1978).
The country rocks at the Galena mine are metafelsite, quartzite, and graphitic and chloritic phyllite of the Spruce Creek sequence (Hawley and Associates, 1978; Thornsberry, McKee, and Salisbury, 1984, fig. K-2 and occurrence map, v. 2). The deposit is a quartz-siderite vein that strikes about N. 45 E., and dips 60 to 75 SE (Capps, 1919, p. 105-106; Davis, 1923, p. 123). The vein has a sharp hanging wall and a gradational foot wall; it is about 8 or 9 feet thick where developed in a crosscut. The vein is limonitic and contains pyrite, galena, sphalerite, tetrahedrite, and arsenopyrite. The sulfides locally form pods up to 1 foot thick. About 300 feet northeast of the mine portal, and on strike with the vein, an open cut developed a foot-thick quartz vein containing chalcopyrite and tetrahedrite.About 50 to 100 tons of ore was mined from the adit and open cut, and shipped to a smelter before 1923 (Brooks, 1922; Davis, 1923). Some of the ore was very rich, assaying up to 131 ounces of silver per ton (Capps, 1919, p. 105-106).
|Geologic map unit||(, )|
|Mineral deposit model||Polymetallic vein (Cox and Singer, 1986; model 22c).|
|Mineral deposit model number||22c|
|Age of mineralization||The deposit is assumed to be Eocene (see record DN091).|
|Alteration of deposit||Silicification. Oxidation of iron minerals.|
|Workings or exploration||The deposit was discovered and mine development began before 1920 (Capps, 1919). About 50 to 100 tons of ore was mined in the winter of 1920-1921 and shipped to a smelter (Brooks, 1922, p. 53; Davis, 1923, p. 123). The workings were largely caved by 1931 (Wells, 1933). The area was explored in about 1960 by Moneta-Porcupine (Seraphim, 1962), but no ore was developed. The Galena mine area was mapped and sampled by Bundtzen (1981); Hawley and Associates (1978); and, in 1983, by the U.S. Bureau of Mines (Thornsberry, McKee, and Salisbury, 1984, v. 2, location 27). During their investigation, the Bureau drilled one core hole below the discovery adit (hole K-17). This hole intersected what is probably the Galena vein between 234.1 feet and 240.5 feet. The weighted assay of the 5.2-foot vein intercept is 0.2 ounce of gold per ton and 8.14 ounces of silver per ton. Copper, lead, and zinc contents each average about 0.1-0.4 percent. During the same study, a selected surface sample of the vein assayed more than 45 ounces of silver per ton, 3.3 percent lead, 5.5 percent zinc, and small amounts of gold and copper.|
|Indication of production||Yes; small|
|Production notes||The Galena mine produced 50 to 100 tons of ore which reportedly yielded about 17,000 ounces of silver (Bundtzen, Smith, and Tosdal, 1976, p. 25).|
Additional commentsThe mine is in Denali National Park and Preserve.
Brooks, A.H., 1922, The Alaska mining industry in 1920: U.S. Geological Survey Bulletin 722-A, p. 1-74.
Bundtzen, T.K., 1981, Geology and mineral deposits of the Kantishna Hills, Mt. McKinley quadrangle, Alaska: M. S. Thesis, University of Alaska, College, Alaska, 238 p.
Bundtzen, T.K., Smith, T.E., and Tosdal, R.M., 1976, Progress report--Geology and mineral deposits of the Kantishna Hills: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-98, 80 p., 2 sheets, scale 1:63,360.
Cobb, E. H., 1972, Metallic mineral resources map of the Mount McKinley quadrangle, Alaska: U. S. Geological Survey Miscellaneous Field Studies Map MF-366, 1 sheet, scale 1:250,000.
Cobb, E.H., 1980, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount McKinley quadrangle, Alaska: U. S. Geological Survey Open-File Report 80-363, 150 p.
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Davis, J. A., 1923, The Kantishna region, Alaska, in Stewart, B. D., Annual Report of the Mine Inspector to the Governor of Alaska, 1922: Alaska Division of Geological and Geophysical Surveys AR-1922.
Hawley, C. C. and Associates, Inc, 1978, Mineral appraisal of lands adjacent to Mt. McKinley National Park, Alaska: U. S. Bureau of Mines Open-File Report 24-78, 275 p. (paged by sections).
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.
Seraphim, R.H., 1962, Kantishna District: Alaska Division of Mines and Minerals Miscellaneous Report 193-3, 11 p., 10 sheets.
Thornsberry, V. V., McKee, C. J., and Salisbury, W. G., eds, 1984, 1983 Mineral Resource Studies: Kantishna Hills and Dunkle Mine Areas, Denali National Park and Preserve, Alaska: U. S. Bureau of Mines Open-File Report 129-84. 3 Volumes: v. 1, Text; v. 2, Appendices; v. 3, Maps. Prepared by Salisbury & Dietz, Inc., Spokane, WA.
|Last report date||4/29/2001|