Halibut Bay 48 Occurrence, Kodiak Mining District, Kodiak Island Borough, Alaska, USAi

Regional Level Types
Halibut Bay 48 Occurrence	Occurrence
Kodiak Mining District	Mining District
Kodiak Island Borough	Borough
Alaska	State
USA	Country

Site is located within Kodiak National Wildlife Refuge.
Location: This site is located 5.0 miles north of Anvil Mountain in sec. 32, T. 32 S., R. 33 W., of the Seward Meridian (Foley and Barker, 1985, figure 25, locality 48; Foley and others, 1989, locality 32). Site location is accurate to within several hundred feet.
Geology: This chromite occurrence, one of several within the Halibut Bay ultramafic complex, consists of a zone of disseminated grains and bands or stringers of chromite. The zone, inferred to measure 150 by 6 feet and to have inferred depth of 38 feet, constitutes an inferred resource of approximately 4000 tons of rock containing an estimated 6 percent chromite (Foley and Barker, 1985, table 13). A chip sample across 6 feet assayed 120 ppm cobalt, 3.8 percent chrome, 640 ppm copper, 120 ppm nickel, and trace amounts of platinum and palladium (Foley and Barker, 1985, table 14). The Halibut Bay ultramafic complex, consisting mostly of dunite, gabbro, pyroxenite, and peridotite, occurs within sedimentary units of the Uyak formation of Cretaceous age
Workings: This deposit is inferred to contain 4000 tons of rock grading 6 percent chromite. One six-foot chip sample assayed 3.8 percent chrome, 120 ppm cobalt, 640 ppm copper, 120 ppm nickel, with trace platinum and palladium.
Alteration: The ultramafic country rock is serpentinized?
Reserves: This deposit is estimated to contain 4000 tons of rock grading 6 percent chromite.

Commodities (Major) - Cr
Development Status: None
Deposit Model: Podiform chromite (Cox and Singer, 1986; model 8b).

Other Databases

Link to USGS - Alaska:	KR023

Other Regions, Features and Areas containing this locality

References