Unnamed (adjacent to Cantwell Creek)

Occurrence in Alaska, United States with commodity Manganese

Geologic information

Identification information

Deposit ID 10000719
MRDS ID A011358
Record type Site
Current site name Unnamed (adjacent to Cantwell Creek)
Related records 10185311

Geographic coordinates

Geographic coordinates: -148.93671, 63.38654 (WGS84)
Relative position The prospect adjoins the northwest side of Cantwell Creek approximately 1,000 feet upstream from its junction with the Jack River and about 0.6 mile southeast of Cantwell. The site is in sec. 5, T. 18 S., R. 7 W., of the Fairbanks Meridian. The location is accurate to within 1500 feet. This is location 7 of Clark and Cobb (1972).
(click for info)

Geographic areas

Country State
United States Alaska


Commodity Importance
Manganese Primary

Materials information

Materials Type of material
Rhodochrosite Ore
Quartz Gangue

Mineral occurrence model information

Model code 156
USGS model code 25g
Deposit model name Epithermal Mn

Nearby scientific data

(1) -148.93671, 63.38654

Comments on the geologic information

  • Geologic Description = The host rocks are a melange of Paleozoic and upper Mesozoic sedimentary rocks. An 8-foot-wide outcrop contains crushed and partially recrystallized rhodochrosite; other manganese minerals are present, but not identified. The deposit is probably localized along strands of the McKinley fault.
  • Age = Post-Mesozoic.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bonnifield

Comments on the workings information

  • Workings / Exploration = Surface samples contain as much as 33.35% manganese (Berg and Cobb,1967).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011358
USGS Alaska Resource Data File ARDF HE143

Bibliographic references

  • Deposit

    Warfield, R.S., 1954, Cantwell manganese deposit, Bonnifield district: Alaska Territorial Dept. of Mines Miscellaneous Report 67-8, 9 p.

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-1062, 113 p.

  • Deposit

    Clark, A.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Healy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-394, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Cobb, 1978 (OFR 78-1062)

General comments

Subject category Comment text
Deposit Model Name = Epithermal Mn (Cox and Singer, 1986; model 25g)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-2000 N. Van Wyck Stevens Exploration Management Corporation