Keefer Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale TA
Quadrangle map, 1:63,360-scale B-1
Latitude 60.3
Longitude -156.1
Nearby scientific data Find additional scientific data near this location
Location and accuracy Keefer Creek is an approximately 7-mile-long south tributary to the Mulchatna River. Its confluence with the Mulchatna River is about 7 miles upstream from the mouth of Mosquito River, a north tributary to the Mulchatna River. This occurrence is very approximately located, probably within several miles. For this record, the map site is on Keefer Creek at the north border of section 9, T 2 N, R 39 W, of the Seward Meridian. The occurrence was referred to as 'Keefer Creek' by Cobb (1972 [MF 384]).

Geologic setting

Geologic description

A written communication from F. H. Waskey (1935), probably to J. B. Mertie Jr., reported that placer gold had been identified on Keefer Creek (Cobb, 1972 [MF 384]). Keefer Creek is an approximately 7-mile-long south tributary to the Mulchatna River. The Mulchatna River approximately coincides with a major structural boundary between mid-Cretaceous Kuskokwim Group clastic rocks to the west and Mesozoic sedimentary and igneous rocks to the east (Decker and others, 1994).
Geologic map unit (-156.102231631018, 60.299301745634)
Mineral deposit model Placer Au-PGE (Cox and Singer, 1986; model 39a)
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Indication of production None


MRDS Number 10308358


Decker, J., Bergman, S.C., Blodgett, R.B., Box, S.E., Bundtzen, T.K., Clough, J.G., Coonrad, W.L., Gilbert, W.G., Miller, M.L., Murphy, J.M., Robinson, M.S., and Wallace, W.K., 1994, Geology of southwestern Alaska, in Plafker, G. and Berg, H.C., eds., The Geology of Alaska: Geological Society of America DNAG, The Geology of North America, v. G-1, p. 285-310.
Reporters Travis L. Hudson
Last report date 12/30/2000