Cottonwood Creek Prospect, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Cottonwood Creek Prospect	Prospect
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

Location: The Cottonwood Creek placer prospect is west of the Maclaren River, mainly in sections 27 and 28, T. 19 S., R. 6 E., Fairbanks Meridian, and at an elevation of about 3,600 feet; The location for this record represents a section of the creek that extends from an elevation of about 3,000 feet to about 3,900 feet. The site corresponds to locality A19 of Kurtak and others (1992).
Geology: Cottonwood Creek flows southeasterly through alluvium and glacial outwash on the west side of the Maclaren River. Bedrock, locally cut by the creek, consists of basalt of Late Triassic age. Samples collected along the course of Cottonwood Creek suggest that most of the alluvium contains near-background concentrations of gold, although very fine flakes of gold were seen in all pan-concentrate samples (Kurtak and others, 1992, p. 125-126). One sample of active stream gravel contained three visible flakes and 4,450 parts per billion gold. Two other samples contained sub-background gold concentrations as determined by assay (Kurtak and others, 1992). Silver was detected in two samples, and tungsten ranged between 50 and 60 parts per million in four pan-concentrate samples.
Workings: There are no substantial workings at the prospect. The claims were located in 1979.
Age: Holocene.

Commodities (Major) - Au; (Minor) - Ag, W
Development Status: Undetermined.
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a).

Other Databases

Link to USGS - Alaska:	MH083

Other Regions, Features and Areas containing this locality

References