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  3. Mineral Resource Data System (MRDS)

Cloudman Bay

Prospect in Alaska, United States with commodities Silver, Gold
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10307351
Record type Site
Current site name Cloudman Bay

Geographic coordinates

Geographic coordinates: -146.72454, 60.83558 (WGS84)
Relative position This prospect is at sea level in the south bight of Cloudman Bay on Bligh Island. It is located in the SW1/4 sec. 7, T. 12 S., R. 8 W., of the Copper River Meridian. The site is accurately located to within 1000 ft. This prospect is shown as site C-93 in Jansons and others (1984) and as loc. 3 in Cobb (1972: MF-392).

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordova D-8(quadrangle 1:63,360 scale)

Cordova NW(quadrangle 1:100,000 scale)

Cordova(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Eastern Prince William Sound(hydrologic unit)

Prince William Sound(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tatitlek Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Chugach 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
Silver Primary
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Nearby scientific data

(1) -146.72454, 60.83558
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The country rock at this prospect is slate of the Tertiary Orca Group (Nelson and others, 1985). Capps and Johnson (1915) reported a 20-to 30-foot-wide quartz stockwork zone in the slate carrying chalcopyrite, pyrite, and sphalerite. Capps and Johnson (1913) reported 40 feet of stripping at the site. Samples across a 30 foot width of stockwork ran a few dollars/ton when gold was $20/oz. (Capps and Johnson, 1915). Site could not be located in the early 1980s (Jansons and others, 1984).
  • Age = Probably Tertiary based on the age of the host rocks.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Copper River

Comments on the workings information

  • Workings / Exploration = Capps and Johnson (1913) reported 40 feet of stripping at the site. Samples across a 30 foot width of stockwork ran a few dollars/ton when gold was $20/oz. (Capps and Johnson, 1915). Site could not be located in the early 1980s (Jansons and others, 1984).

Reference information

Bibliographic references

  • Deposit

    Capps, S.R., and Johnson, B.L., 1913, Mineral deposits of the Ellamar district: U.S. Geological Survey Bulletin 542, p. 86-124.

  • Deposit

    Capps, S.R., and Johnson, B.L., 1915, The Ellamar district, Alaska: U.S. Geological Survey Bulletin 605, 125 p.

  • Deposit

    Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

  • Deposit

    Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Cordova quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-392, 1 sheet, scale 1:250,000.

  • Deposit

    Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Cobb, 1972 (MF392)

General comments

Subject category Comment text
Deposit Other Comments = Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-00 S.W. Nelson 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.