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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed (vicinity Kane Peak)

Occurrence in Alaska, United States with commodity PGE
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10000290
MRDS ID A010336
Record type Site
Current site name Unnamed (vicinity Kane Peak)

Geographic coordinates

Geographic coordinates: -133.09883, 56.98363 (WGS84)
Relative position Well known mafic-ultramafic body centered about 13 miles north-northwest of Petersburg. Consists of slightly elongate pluton about two and a half square miles in outcrop that extend from just east of Kane Peak northeast to exposures for about a mile along the shoreline southeast of Cape Strait. The coordinates above are approximately the center of the body. Locality 16 and 17 of Grybeck, Berg, and Karl (1984). Often informally referred to as the Kane Peak deposit, or ultramafic complex.

Site location context

Political divisions (FIPS codes)

Wade Hampton(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Petersburg D-4(quadrangle 1:63,360 scale)

Petersburg N(quadrangle 1:100,000 scale)

Petersburg(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
PGE Critical Primary

Comments on the commodity information

  • Ore Material = pyrrhotite (but see geologic description below)

Materials information

Materials Type of material
Chalcopyrite Ore
Chromite Ore
Magnetite Ore
Pentlandite Ore
Pyrrhotite Ore

Alteration

  • (Local) None.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite

Nearby scientific data

(1) -133.09883, 56.98363
ListMap

Economic information

Comments on the geologic information

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

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Mining district

District name Kupreanof

Comments on the production information

  • Production Notes = None

Comments on the reserve resource information

  • Reserves = None

Comments on the workings information

  • 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.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Taylor and Noble, 1969; Himmelberg, Loney, and Craig, 1995

General comments

Subject category Comment text
Deposit Model Name = Zoned or Alaska-type ultramafic complex with disseminated, magmatic sulfides and oxides.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1998 H.C. Berg U.S. Geological Survey
Reporter 01-NOV-1998 D.J. Grybeck U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

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