Unnamed Prospect (ARDF - GU008; on Hogan Hill), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - GU008; on Hogan Hill)	- not defined -
Chistochina Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

See also GU006 and GU007.
Location: An unnamed prospect (one of the Hogan Hill prospects of Cobb, 1979 [OF 79-1247, p. 14]) is on the north end of Hogan Hill about 0.1 mile east of the Richardson Highway. The prospect is about 0.1 to 0.2 miles east of the center of section 7, T. 10 N., R. 1 W., Copper River Meridian. This prospect is locality 3 of Rose and Saunders (1965), and Richter and Matson (1972). The location is probably accurate within 0.1 mile.
Geology: The prospect is in amphibolite on the south flank of a granodiorite intrusion that crops out northeast of Hogan Hill. The foliation in the amphibolite strikes north to north-northwest and dips steeply to the east. Small quartz veins strike east-northeast and dip 75 degrees southeast. The strike of the amphibolite is sub parallel to the contact between the granodiorite and amphibolite (Rose and Saunders, 1965, figs 1 and 2). The amphibolite and granodiorite both form part of the Gulkana River metamorphic complex. Veinlets of quartz that contain pyrite and chalcopyrite with subordinate galena and sphalerite are sub parallel to the foliation of the amphibolite (Rose and Saunders, 1965; Mulligan, 1974).
Workings: Many small prospect pits (Rose and Saunders, 1965; Mulligan, 1974).
Age: Mineralization is probably related to a Late Jurassic granodiorite.

Commodities (Major) - Cu; (Minor) - Pb, Zn
Development Status: None
Deposit Model: Polymetallic vein or low-grade porphyry copper(?) (Cox and Singer, 1986; model

Other Databases

Link to USGS - Alaska:	GU008

Other Regions, Features and Areas containing this locality

References