Snowstone Group; Wallace; McPherson; Valentine Prospect, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Snowstone Group; Wallace; McPherson; Valentine Prospect	Prospect
Prince William Sound Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: The prospect is located about a quarter of a mile from tidewater on the north side of Bay of Isles at an elevation of 200 feet. It is in the NE1/4 section 27, T. 4 N., R. 10 E., of the Seward Meridian. This is location 206 of Cobb and Tysdal (1980) and location S-74 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The prospect is described as gabbro dikes cutting greenstone (Kurtak and Jeske, 1986). The dikes contain disseminated magnetite and a trace of pyrrhotite. Two adits are present; one is 55 feet and the other is 25 feet in length. Both adits were driven on the contact between the dikes and greenstone of the Orca Group of early Teriary age (Grant and Higgins, 1909; Cobb and Tysdal, 1980; Nelson and others, 1985). Two random chip samples collected from the greenstone and a gabbro dike contained less than 100 ppm base metals (Kurtak and Jeske, 1986).
Workings: Workings consist of two adits; one is 55 feet long and the other is 25 feet in length. Both adits were driven on the contact between the gabbro dikes and greenstone of the lower Tertiary Orca Group (Grant and Higgins, 1909; Cobb and Tysdal, 1980; Nelson and others, 1985). Two random chip samples collected from the greenstone and a gabbro dike contained less than 100 ppm base metals (Kurtak and Jeske, 1986).
Age: Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

Commodities (Major) - Cu; (Minor) - Zn
Development Status: None
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a)

Other Databases

Link to USGS - Alaska:	SR259

Other Regions, Features and Areas containing this locality

References