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

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

MAS/MIL number 20760101.
Location: Placer claims on Joe Creek extend from the SW1/4 sec. 8, T. 25 N., R. 11 E., Seward Meridian, to its junction with Sanona Creek. The location is at the upper end of the claims, at an elevation of about 3,750 feet. The location is accurate to within 1/2 mile.
Geology: Upper Joe Creek drains an area of siltstone, shale, and cobble and boulder conglomerate of the Naknek Formation (Csejtey and others, 1978). The middle part of the creek cuts sandstone, siltstone, and conglomerate in fault contact with Talkeetna Formation volcanic rocks, sandstone, and argillite. Some ridges are capped with Tertiary fluviatile conglomerate. Gold occurs in alluvial gravel deposits. The deposits are 50 to 800 feet wide but the thickness is unknown. The gradient of the stream is 60 to 150 feet per mile (Kurtak and others, 1992). Stream-sediment samples collected by the U.S. Bureau of Mines contain up to 1 part per million silver and up to 0.0014 ounce of gold per cubic yard (Kurtak and others, 1992).
Workings: At least 37 placer claims were staked between 1980 and 1983. The Bureau of Mines collected samples in the creek (Balen, 1990; Kurtak and others, 1992).
Age: Quaternary placer.
Reserves: Joe Creek contains an estimated 10 million cubic yards of potentially auriferous, alluvial material; no grade estimate is available (Kurtak and others, 1992).

Commodities (Major) - Au; (Minor) - Ag
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a)

Other Databases

Link to USGS - Alaska:	TK111

Other Regions, Features and Areas containing this locality

References