Site is located within Kodiak National Wildlife Refuge.
Location: 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.
Geology: 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.
Workings: 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.

Commodities (Major) - Cu, Ni; (Minor) - Cr
Development Status: None
Deposit Model: Synorogenic-synvolcanic Ni-Cu (Cox and Singer, 1986; model 7a?)

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Chromium

ⓘ Copper

Mineral List

ⓘ Chalcopyrite

ⓘ Chromite

ⓘ Pyrrhotite

3 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

ⓘ Pyrrhotite

Formula: Fe_1-xS

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
Group 4 - Oxides and Hydroxides
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄

List of minerals for each chemical element

O	Oxygen
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	Iron
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	ⓘ Pyrrhotite	Fe_1-xS
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂

Other Databases

Link to USGS - Alaska:	KR028

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Peninsular-Talkeetna DomainDomain

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

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. Foley, J.Y., Burns, L.E., Schneider, C.L., and Forbes, R.B., 1989, Preliminary report of platinum group element occurrences in Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 89-20, 32 p., 1 map sheet, scale 1:2,500,000.

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