Unnamed Occurrence (ARDF - SR219; central Chenega Island), Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - SR219; central Chenega Island)	- not defined -
Prince William Sound Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: The occurrence is located on the northeast side of Chenega Peak at an elevation of about 1,660 feet. It is in the SE1/4 section 28, T. 3 N., R. 8 E., of the Seward Meridian. This is location 221 of Tysdal (1978 [MF-880-A]) and location S-87 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The occurrence consists of greenstone with remnant pillow structures that is interbedded with shale. The greenstone contains quartz stringers, epidote blebs, and traces of pyrite. The bedrock strikes N5E and dips steeply to the west (Kurtak and Jeske, 1986). Bedrock in the area is Orca Group of early Teriary age (Nelson and others,1985). Two random chip samples of quartz-epodite-pyrite blebs contained as much as 2.3 ppm silver, 520 ppm chrome, 115 ppm nickel, and 1,350 ppm manganese (Kurtak and Jeske, 1986).
Workings: Two random chip samples were collected from greenstone with quartz-epodite blebs and stringers and a trace of pyrite, and from iron-stained greenstone with epidote. They contained as much as 2.3 ppm silver, 520 ppm chrome, 115 ppm nickel, and 1,350 ppm manganese (Kurtak and Jeske, 1986). Not workings or improvements are present.
Age: Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

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

Other Databases

Link to USGS - Alaska:	SR219

Other Regions, Features and Areas containing this locality

References