Unnamed (on Smith Creek Dome) (ARDF #WI110) Au, Sb

Unnamed (on Smith Creek Dome)

Prospect, Inactive

Commodities and mineralogy

Main commodities	Au; Sb
Ore minerals	cervantite; gold; kermesite; stibiconite; stibnite
Gangue minerals	quartz

Geographic location

Quadrangle map, 1:250,000-scale	WI
Quadrangle map, 1:63,360-scale	B-1
Latitude	67.4852
Longitude	-150.1554
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	This prospect is at an elevation of about 3,150 feet in a saddle approximately 0.7 mile northeast of the summit of Smith Creek Dome. The location is accurate.

Geologic setting

Geologic description The prospect consists of stibnite and various alteration products of stibnite (including cervantite, kermesite, and stibiconite) in a 6-inch-wide vein exposed in an old trench. The vein strikes N5E and dips 50E. Rock samples collected by Brosge and Reiser (1972) from this prospect contain up to 9.2 ppm gold. A sample collected in the late 1990s described as vein quartz with stibnite and a yellow alteration mineral contained only 436 ppb gold, 297 ppm arsenic and 28.09% antimony (Kurtak and others, 1999; Eden, 2000). The rocks in the area are Upper Devonian, brown micaceous schist, with lesser phyllite and metasiltstone (Eden, 2000).
Geologic map unit	(-150.158149772184, 67.4847752004498)
Mineral deposit model	Simple Sb deposit (Cox and Singer, 1986; model 27d)
Mineral deposit model number	27d
Alteration of deposit	The stibnite is altered to secondary antimony minerals.

Production and reserves

Workings or exploration	Vein exposed in a small prospect pit or trench.
Indication of production	None
Additional comments See also Jones and Boyle (WI114) and Wannemaker and Wortman (WI115). Note that the this prospect is different from another unnamed occurrence (WI127) nearer the summit of Smith Creek Dome.

References

MRDS Number	A011939
References Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p. Cobb, E.H., 1972, Metallic mineral resources map of the Wiseman quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-469, 1 sheet, scale 1:250,000 Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p. Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Wiseman quadrangle, Alaska; Supplement to Open-File Report 76-340; Part B, Lists of references to January 1, 1981: U.S. Geological Survey Open-File Report 81-732-B, 22 p. Dillon, J.T., 1982, Source of lode and placer gold deposits of the Chandalar and upper Koyukuk Districts: Alaska Division of Geological and Geophysical Surveys Open-File Report AOF-158, 25 p., 1 sheet, scale 1:250,000. Ebbley, Norman, Jr., and Wright, W.S., 1948, Antimony deposits in Alaska: U.S. Bureau of Mines Report of Investigations 4173, 41 p. Eden, K., 2000, Geology and gold mineralization of the Nolan area in the Brooks Range, Alaska: U.S. Bureau of Land Management Open-File Report 78, 87 p. Joesting, H.R., 1943, Strategic mineral occurrences in interior Alaska, supplement to pamphlet No. 1: Alaska Territorial Department of Mines Pamphlet 2, 31 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. Maas, K.M., 1987, Maps summarizing land availability for mineral exploration and development in northern Alaska, 1986: U.S. Bureau of Mines Open-File Report 10-87, 33 quadrangle overlays. Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p., 9 sheets, scale 1:250,000.
Reporters	J.M. Britton (Anchorage)
Last report date	8/9/2002