|Quadrangle map, 1:250,000-scale||KR|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This site is located 4.8 miles north of Anvil Mountain in sec. 33, T. 32 S., R. 33 W., of the Seward Meridian (Foley and Barker, 1985, figure 26, locality 15G; Foley and others, 1989, locality 32). Site location is accurate to within a few hundred feet.|
At this mineral occurrence, one of several within the Halibut Bay ultramafic complex, chalcopyrite and pyrrhotite are present as disseminations in a 3-foot layer of gabbro. The gabbro layer lies between pyroxenite and peridotite. A sample of this material contained 1,700 ppm copper, 420 ppm nickel, 25 ppm cobalt, and traces of gold, silver, 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.
|Geologic map unit||(-154.597328222423, 57.3562743202029)|
|Mineral deposit model||Synorogenic-synvolcanic Ni-Cu (Cox and Singer, 1986; model 7a?)|
|Mineral deposit model number||7a?|
|Workings or exploration||A grab sample from this locality contained 1,700 ppm copper, 420 ppm nickel, 25 ppm cobalt, and traces of gold, silver, platinum, and palladium.|
|Indication of production||None|
Additional commentsSite is located within Kodiak National Wildlife Refuge.
Dahlin, D.C., Kirby, D.E., and Brown, L.L., 1985, Chromite deposits along the Border Ranges fault, southern Alaska; Part 2--Mineralogy and results of beneficiation tests: U.S. Bureau of Mines Information Circular 8991, 37 p.
Foley, J.Y., and Barker, J.C., 1985, Chromite deposits along the Border Ranges fault; Part 1 -- Field investigations and descriptions of chromite deposits: U.S. Bureau of Mines Information Circular 8990, 57 p.
|Reporters||S.H. Pilcher (Anchorage)|
|Last report date||9/6/1998|