Unnamed (vicinity Kane Peak)

The Unnamed (vicinity Kane Peak) is a pge mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (vicinity Kane Peak)

Commodity

Primary: PGE

Location

State: Alaska
District: Kupreanof

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: None.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrrhotite
Ore: Chalcopyrite
Ore: Chromite
Ore: Magnetite
Ore: Pentlandite

Comments

Comment (Geology): Age = Late to Early Cretaceous based on 93.4 to 102.0 Ma, K-Ar age dates (Himmelberg and Loney, 1995).

Comment (Reserve-Resource): Reserves = None

Comment (Workings): Workings / Exploration = Two claims were staked on the body for Fe in 1960 along the coast near near Cape Strait, probably on magnetite-bearing hornblendite that crops out there (U. S. Bureau of Mines, 1980). In addition, the Kane Peak body has repeatedly been visited by geologists over the years as a potential site for Fe, Cu, and Pt-group deposits and for its scientific value. With the possible exception of the claims staked for Fe along Frederick Sound, there is little evidence at present (1998) of anything close to an economic deposit within the complex.

Comment (Production): Production Notes = None

Comment (Reference): Primary Reference = Taylor and Noble, 1969; Himmelberg, Loney, and Craig, 1995

Comment (Deposit): Model Name = Zoned or Alaska-type ultramafic complex with disseminated, magmatic sulfides and oxides.

Comment (Geology): Geologic Description = Kane Peak is a classic 'zoned' or Alaska-type mafic-ultramafic complex with a dunite-wherlite (olivine-clinopyroxenite peridotite) core bordered by a hornblendite shell about 300 feet thick. About 80% of the body is dunite and wehrlite that grade into one another. Small-scale cumulus layering is present but the body is poorly exposed and its overall structure is uncertain. The body probably has steeply dipping contacts and extends under Frederick Sound to the northeast a half mile or more. The mafic-ultramafic complex intrudes Late Jurassic and Early Cretaceous, metamorphosed pelites of the Semour Canal Formation, and is bordered to the northwest and and south by Cretaceous migmatite. The Kane Peak complex has been dated at from 93.4 to 102.0 Ma by K-Ar methods. (The foregoing description is based mainly on Himmelberg and Loney, 1995; but also see Walton, 1951; Taylor, 1967; and Taylor and Noble, 1969, for earlier interpretations of this and other Alaska-type bodies in southeastern Alaska.)? Pyrrhotite, pentlandite, and chalcopyrite are sporadically disseminated through the peridotite; sparse disseminated chromite occurs widely in the dunite; and the hornblendite locally contains titaniferous magnetite. Himmelberg and Loney (1995) provide trace metal content for several metals including Co, Ni, and Cr. However, to date neither the sulfide occurrences nor the published analyses indicate that ore minerals are more than trace or accessory minerals. There are persistent rumors of anomalous Pt-group values in a sample or samples collected somewhere on the body but this may only reflect that the body has been sampled for these elements.

Comment (Commodity): Ore Material = pyrrhotite (but see geologic description below)

References

Reference (Deposit): Cobb, E. H., 1972, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Petersburg Quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-870, 53 p.

Reference (Deposit): Taylor, H.P., Jr., and Noble, J.A., 1969, Origin of magnetite in the zoned ultramafic complexes of southeastern Alaska, in Wilson, H. D .B., ed., Magmatic ore deposits: Economic Geology Monograph 4, p. 209-230.

Reference (Deposit): Taylor, H.P., 1967, The zoned ultramafic complexes of southeastern Alaska, in Wyllie, P.J., ed., UIltramafic and related rocks: New York, J. Wiley and Sons, p. 97-121.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Petersburg quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-870, 53 p.

Reference (Deposit): Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Brew, D. A., Ovenshine, A. T., Karl, S. M., and Hunt, S. J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Petersburg quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-415, 1 sheet, scale 1:250,000.

Reference (Deposit): U.S. Bureau of Mines, 1980, Claim map, Petersburg quadrangle, Alaska: U.S. Bureau of Mines Map 117, 1 sheet, scale 1:250,000.

Reference (Deposit): Walton, M.S., 1951, The Blashke Island ultrabasic complex with notes on related areas in southeastern Alaska: U.S. Geological Survey Open-File Report 126, 266 p.

Reference (Deposit): Himmelberg, G.R., and Loney, R.A., 1995, Characteristics and petrogenesis of Alaskan-type ultramafic-mafic intrustions, southeastern Alaska: U.S. Geological Survey Professional Paper 1564, 47 p.

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