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  3. Mineral Resource Data System (MRDS)

Tak II

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

Geologic information

Identification information

Deposit ID 10003599
MRDS ID A106357
Record type Site
Current site name Tak II

Geographic coordinates

Geographic coordinates: -154.15265, 60.12943 (WGS84)
Relative position About 5.6 km south of the western end of Kontrashibuna Lake, near the headwaters of Takoka Creek on peak 4,367. This is locality 10 of MacKevett and Holloway (1977). Sec. 33, T. 1 N., R. 28 W., of the Seward Meridian. Location accurate within 1.6 km.

Site location context

Political divisions (FIPS codes)

Lake and Peninsula(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake Clark A-4(quadrangle 1:63,360 scale)

Lake Clark SE(quadrangle 1:100,000 scale)

Lake Clark C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lake Clark(hydrologic unit)

Kvichak-Port Heiden(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Lake Clark National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Iron Primary

Alteration

  • (Local) Unknown

Mineral occurrence model information

Model code 62
USGS model code 18d
Deposit model name Skarn Fe
Model code 59
USGS model code 18b
Deposit model name Skarn Cu
Mark3 model number 8

Nearby scientific data

(1) -154.15265, 60.12943
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Occurrence identified by 58 lode iron claims (U.S. Bureau of Mines, 1973). MacKevett and Holloway (1977) reported that the occurrence may be in mineralized zones of contact-metamorphosed Upper Triassic limestone and dolomite that has been intruded by Tertiary, medium- to fine-grained hornblende-biotite quartz monzodiorite (Nelson and others, 1983; unit Ti2). The pluton yields concordant potassium-argon ages for hornblende and biotite of about 61 m.y. (Reed and Lanphere, 1972; 1973). Other nearby rocks include Tertiary volcanic rocks, which include rhyolitic breccia, ash-flow tuff, flows, felsic intrusive rocks, and subordinate mafic to intermediate flows (Nelson and others, 1983; unit Tv). Potassium-argon ages for Unit Tv range from 56.2 to 62.7 m.y. (Eakins and others, 1978).
  • Age = Mineralization is Tertiary or younger. The quartz monzodiorite which is probably the source of the skarn yields concordant potassium-argon ages for hornblende and biotite of about 61 m.y. (Reed and Lanphere, 1972; 1973). Potassium-argon ages for the volcanic rocks range from 56.2 to 62.7 m.y. (Eakins and others, 1978).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bristol Bay

Comments on the production information

  • Production Notes = No production

Comments on the reserve resource information

  • Reserves = No reserves

Comments on the workings information

  • Workings / Exploration = Unknown

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = U.S. Bureau of Mines, 1973

General comments

Subject category Comment text
Deposit Model Name = Fe skarn ? or Cu skarn ? (Cox and Singer, 1986; model 18d ? or 18b ?)
Deposit Other Comments = Site is in Lake Clark National Park and Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 15-JUN-1998 D.P. Bickerstaff 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

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.