Unnamed Occurrence (ARDF - TK065; southeast of Mount Watana), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - TK065; southeast of Mount Watana)	- not defined -
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

MAS/MIL number 20760090.
Location: This occurrence is 0.6 mile southeast of the summit of Mount Watana at an elevation of about 5,300 feet. The location is accurate to within 1/2 mile.
Geology: The rocks in the Mount Watana area are mostly by Pennsylvanian to Lower Permian basaltic to andesitic metavolcanic rocks, with local ultramafic rocks, chert, and marble (Csejtey and others, 1978). Pyrite and pyrrhotite are disseminated in mafic dikes; pyrite and arsenopyrite occur in andesitic metatuff. Quartz-carbonate veins cut the metabasalt and malachite coats some outcrops. Serpentinized ultramafic rocks, locally cut by asbestos veins, occur in float (Kurtak and others, 1992). Samples of metabasalt contain up to 0.23 percent copper, 203 parts per million nickel, 1 part per million silver, and 220 parts per billion gold; a sample of podiform ultramafic(?) float contains 15 parts per million silver (Kurtak and others, 1992). A sample of mudstone contains 1 part per million silver and 3000 parts per million barium (Miller and others, 1978).
Workings: Surface sampling by the U.S. Geological Survey and U.S. Bureau of Mines (Miller and others, 1978; Kurtak and others, 1991).
Alteration: Oxidation of copper mineral.

Commodities (Major) - Ag, Au, Cu; (Minor) - Ba, Ni
Development Status: None
Deposit Model: Basaltic copper, Serpentine-hosted asbestos, Layered mafic intrusion? (Cox and

Other Databases

Link to USGS - Alaska:	TK065

Other Regions, Features and Areas containing this locality

References