Marshall Glacier Occurrence, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Marshall Glacier Occurrence	Occurrence
Prince William Sound Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is about eight-tenths of a mile northeast of the toe of Marshall Glacier on an unnamed stream; it is approximately on the north boundary of section 24, T. 9 S., R. 2 W., of the Copper River Meridian. This occurrence is approximately located, perhaps within a mile or more.
Geology: Float of massive and semimassive sulfide cobbles and boulders have been found in the drainage of Marshall Glacier (Kodosky and Teller, 1989). Minerals identified in these cobbles include chalcopyrite, pyrite, pyrrhotite, and quartz. The source and setting of this mineralization has not been identified. It is tentatively considered to be similar to other sulfide-rich occurrences in mafic metavolcanic rocks of the Valdez Group (for example, VA055 and VA144).
Workings: Only reconnaissance surface examinations and sampling have taken place.
Age: Late Cretaceous?; the host metavolcanic rocks may be ocean-floor basalts that were accreted with the enclosing flysch of the Valdez Group (Winkler and others, 1981 [OFR 80-892-A]).

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

Other Databases

Link to USGS - Alaska:	VA151

Other Regions, Features and Areas containing this locality

References