Unnamed Prospect (ARDF - GU037; upper Granite Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - GU037; upper Granite Creek)	- not defined -
Chistochina Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.
Location: The prospect is at an elevation of about 5,000 feet in a major west-flowing tributary to upper Granite Creek . It is listed as an unnamed prospect by Cobb (1979 [OF 79-1247]). The prospect is near the creek and approximately on the boundary between sections 15 and 16, T. 13 N., R. 7 E., Copper River Meridian. It was listed as locality 9 by both Richter and Matson (1972) and MacKevett and Holloway (1977).
Geology: The prospect is one of several in or near the western contact zone of a Jurassic diorite to quartz-diorite batholith (Richter and Matsen, 1968; Richter, Lanphere, and Matson, 1975). Stream sediments collected from this zone (area 1, WGM Inc., 1980) were moderately anomalous in gold over a distance of about fifteen miles. According to Kirk Stanley (written communication 2000), chalcopyrite and molybdenite commonly occur along joint surfaces in silica-carbonate rock, which is widely developed near the western contact of the Jurassic pluton. No specific information is known about the prospect.
Workings: The prospect was briefly described to Richter in 1969 by Kirk Stanley. It is probably in or near upper Granite Creek as described by Stanley in a letter to Ahtna Minerals Corporation (written communication, 2000).
Age: Probably coeval with a Jurassic diorite to quartz-diorite complex.

Commodities (Major) - Cu; (Minor) - Au, Mo
Development Status: None
Deposit Model: Porphyry Cu-Mo(?) (Cox and Singer, 1986; model 21a)

Other Databases

Link to USGS - Alaska:	GU037

Other Regions, Features and Areas containing this locality

References