Craig

Occurrence in Alaska, United States with commodity Copper

Geologic information

Identification information

Deposit ID 10000179
MRDS ID A010216
Record type Site
Current site name Craig

Geographic coordinates

Geographic coordinates: -131.27181, 56.46976 (WGS84)
Relative position The approximate location of the Craig occurrence, known in 1981 (Elliott and Koch, 1981, p. 8, loc. 10) only from a U.S. Bureau of Mines claim map (U.S. Bureau of Mines, 1979), is at an elevation of about 4000 feet on a steep mountainside southwest of a north-flowing tributary of the South Fork of Craig River. The occurrence, which is a few hundred feet below the foot of an icefield, is about 1.1 mile southwest of the Alaska-British Columbia boundary, and roughly 3.8 miles west-northwest of Mt. Pounder on the International Boundary. This location probably is accurate to within about a quarter of a mile.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Magnetite Ore
Pyrite Ore
Pyrrhotite Ore

Alteration

  • (Local) Sulfide disseminations in metasedimentary rocks.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock

Nearby scientific data

(1) -131.27181, 56.46976

Comments on the geologic information

  • Geologic Description = The country rocks in the general area of the Craig occurrence are Mesozoic or Paleozoic metasedimentary rocks, locally including marble, and subordinate metavolcanic rocks (Elliott and Koch, 1981; Koch, 1996). ? the deposit (Elliott and Koch, 1981, loc. 10) consists of chalcopyrite, pyrite, and pyrrhotite disseminated in the metasedimentary rocks; the chalcopyrite also occurs in thin veinlets. Skarn float at or near the prospect contains magnetite and minor chalcopyrite.
  • Age = Mesozoic or Paleozoic

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Petersburg

Comments on the workings information

  • Workings / Exploration = Koch (1997, p. 24-26) reports anomalous values of Ag, Au, Cu, and Zn in a few rock and stream-sediment samples collected by the U.S.Geological Survey in the late 1970's in the area near the Craig occurrence.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010216
USGS Alaska Resource Data File ARDF BC010

Bibliographic references

  • Deposit

    Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.

  • Deposit

    Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.

  • Deposit

    Koch, R.D., 1997, Metalliferous mineral resource potential in the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-271, 57 p., 1 sheet, scale 1:250,000.

  • Deposit

    U.S. Bureau of Mines, 1979, Claim map 118: Mines and prospects of the Bradfield Canal quadrangle, Alaska: U.S. Bureau of Mines Open-File Report 20-73, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Elliott and Koch, 1981

General comments

Subject category Comment text
Deposit Other Comments = Sixty claims were recorded in 1977 (U.S. Bureau of Mines, 1979), but were not active in 1981 (Elliott and Koch, 1981, loc. 10). ?

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey