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  3. Mineral Resource Data System (MRDS)

Cobblestone Creek

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

Geologic information

Identification information

Deposit ID 10003320
MRDS ID A106064
Record type Site
Current site name Cobblestone Creek

Geographic coordinates

Geographic coordinates: -150.3935, 68.50972 (WGS84)
Relative position Located on west side of Cobblestone Creek, 15.7 km south of Arc Mountain. Known to within one mile.

Site location context

Political divisions (FIPS codes)

North Slope(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chandler Lake C-1(quadrangle 1:63,360 scale)

Chandler Lake NE(quadrangle 1:100,000 scale)

Chandler Lake(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Chandler-Anaktuvuk Rivers(hydrologic unit)

Colville River(hydrologic accounting unit)

Arctic Alaska(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Manganese Critical Primary

Nearby scientific data

(1) -150.3935, 68.50972
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Shale and silty mudstone of the Torok Formation are exposed along Cobblestone Creek; greenish-brown mudstone and shale locally display intense manganese staining. Siderite is abundant, but there were no specific manganese minerals identified.
  • Age = Cretaceous

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Colville

Comments on the workings information

  • Workings / Exploration = Samples with iron-manganese staining contain up to 11.7% Mn.

Reference information

Bibliographic references

  • Deposit

    Barnwell, C.E., Simpson, S., and Church, S.E., 1989, Analytical results and sample locality maps of stream-sediment and rock samples from the Cobblestone Creek area, southeastern Chandler Lake quadrangle, Alaska: U.S. Geological Survey Open-file Report 89-540, 38 p.

  • Deposit

    Meyer, M.P., 1994, Analytical results from U.S. Bureau of Mines investigations in the Colville Mining District, Alaska: U.S. Bureau of Mines Open-File Report 34-94, 137 p.

  • Deposit

    Kurtak, J.M., Hicks, R.W., Werdon, M.B., Meyer, M.P., and Mull, C.G., 1995, Mineral investigations in the Colville mining district and southern National Petroleum Reserve in Alaska: U.S. Bureau of Mines Open-File Report 8-95, 217 p.

Comments on the references

  • Primary Reference = Kurtak and others, 1995, USBM OFR 8-95

General comments

Subject category Comment text
Deposit Model Name = Sedimentary manganese

Reporter information

Type Date Name Affiliation Comment
Reporter 07-FEB-1997 K.D. Kelley 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.