|Quadrangle map, 1:250,000-scale||HU|
|Quadrangle map, 1:63,360-scale||A-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||
This placer mine is on the Indian River west of Indian Mountain. The area of placer mining extends downstream on Indian River for about 3 to 4 miles from its junction with Black Creek. The coordinates are near a landing strip about midway along the mined area. The location is accurate.Felix Fork and Snyder Creek are included with the Indian River occurrence as they were probably mined with Indian River. Mining activity was limited on these creeks and their exact locations are indeterminate other than Snyder Creek is said to be a headwater tributary of Indian River. Synder Creek may be the same as Black Creek (HU022).
Placer gold was discovered along the Indian River in 1909 and mining began in 1911 (Eakin, 1914). The auriferous gravels extend from the headwaters of Indian River downstream for a distance of 5 miles (Heiner and Wolff, 1968). The paying gravels were in the modern stream channel and were about 50 feet wide and 2 to 6 feet thick. Bedrock along the productive portion of the stream is predominantly Cretaceous granodiorite and quartz monzonite. The intrusives cut Jurassic(?) and Cretaceous andesite, tuff, graywacke and mudstone.
Several pan-concentrate and placer samples several locations along Indian River contain fine to coarse gold (Kurtak and others, 2002) a sample of one of these placer samples contains returned values of 24 ppm gold, 225 ppm molybdenum, and 1127 ppm tungsten.There are at least two known lode mineral occurrences (HU023, HU021) along the mined section of Indian River, but no nearby large alteration zones or other obvious sources of the placer gold in Indian River have been found (Joesting, 1942; Miller and Ferrians, 1968). The source may be lode deposits along Black Creek (HU021), where rock samples at an intrusive contact showed anomalous gold (Kurtak and others, 1999).
|Geologic map unit||(-153.805431916227, 66.0734629010682)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Workings or exploration||Surface mining beginning in the early 1900s, included some large-scale mining.|
|Indication of production||Yes|
|Production notes||Total production between 1911 and 1915 was 5,154 ounces of gold and 653 ounces of silver (Eakin, 1916). Total production is unknown but probably more than 10,000 ounces (Cobb and Miller, 1981). Large scale mining ended in 1961 and all mining ended in 1965.|
|MRDS Number||A015589; A015590|
Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Brooks, A.H., 1912, The mining industry in 1911, in Brooks, A.H., and others, Mineral resources of Alaska, report on progress of investigations in 1911: U.S. Geological Survey Bulletin 520-A, p. 17-44.
Brooks, A.H., 1916, Mineral resources of Alaska, report on progress of investigations in 1915: U.S. Geological Survey Bulletin 642, 279 p.
Cobb, E.H., 1972, Metallic mineral resources map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-458, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik, Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.
Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168-B, 64 p., 1 map, scale 1:1,000,000.
Cobb, E.H., and Miller, T.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Hughes, Kotzebue, Melozitna, Selawik and Shungnak quadrangles, west-central Alaska; Supplement to Open-File Report 75-627; Part B, Lists of references to January 1, 1981: U.S. Geological Survey Open-File Report 81-847-B, 14 p.
Eakin, H.M., 1914, Mineral resources of the Yukon-Koyukuk region: U.S. Geological Survey Bulletin 592-K, p. 371-384.
Eakin, H.M., 1916, Mineral resources of the Yukon-Koyukuk region: U.S. Geological Survey Bulletin 631, 88 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Heiner, L.E., and Wolff, E.N., eds., 1968, Mineral resources of northern Alaska, Final report, submitted to the NORTH Commission: University of Alaska, Mineral Industry Research Laboratory Report No. 16, 306 p.
Joesting, H.R., 1942, Strategic mineral occurrences in interior Alaska: Alaska Territorial Department of Mines Pamphlet 1, 50 p.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, northern Alaska: Final Report: U.S. Bureau of Land Management Technical Report 50, v. 1 and 2, 845 p.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Williams, E.M., 1999, Mineral investigations in the Koyukuk mining district, northern Alaska--Progress Report: U.S. Bureau of Land Management Open-File Report 74, 158 p.
Martin, G.C., 1919, Alaska Mining Industry in 1917: U.S. Geological Survey Bulletin 692-A, p. 11-42.
Miller, T.P., and Ferrians, O.J., Jr., 1968, Suggested areas for prospecting in the central Koyukuk River region, Alaska: U.S. Geological Survey Circular 570, 12 p.
Patton, W.W., Jr., and Miller, T.P., 1966, Regional geologic map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-459, 1 sheet, scale 1:250,000.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/1/2002|