Black Mountain

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

Geologic information

Identification information

Deposit ID 10094085
MRDS ID A013412
Record type Site
Current site name Black Mountain
Related records 10160999

Geographic coordinates

Geographic coordinates: -159.30678, 61.79046 (WGS84)
Relative position Black Mountain, unnamed on the USGS 1:63,360 topographic map (1952 edition) of the area, is an isolated 1585-foot-high upland about 2.3 miles southwest of Molybdenum Mountain. The map site is 0.25 mile south of the summit of Black Mountain at an elevation of about 1,350 feet. It is in the SW/4 sec. 29, T. 20 N., R. 55 W., of the Seward Meridian. This is locality 3 of Hoare and Cobb (1972, 1977). Hoare and Coonrad (1959) show a prospect symbol at this location.

Site location context

Political divisions (FIPS codes)

Bethel(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Russian Mission D-1(quadrangle 1:63,360 scale)

Russian Mission NE(quadrangle 1:100,000 scale)

Russian Mission(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Aniak(hydrologic unit)

Lower Kuskokwim River(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Calista Corporation(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Antimony Critical Primary

Materials information

Materials Type of material
Stibnite Ore

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Kuskokwim Group
    Rock description Kuskokwim Group

Nearby scientific data

(1) -159.30678, 61.79046

Economic information

Comments on the geologic information

  • Geologic Description = A single, 2-inch wide, stibnite-bearing vein in shaly sandstone was traced for a distance of 200 feet at this location (Ebbley and Wright, 1948). The vein trends subparallel to the contact between clastic sedimentary country rocks and a granitic stock upslope to the north of the vein (Ebbley and Wright, 1948; Hoare and Coonrad, 1959). Host rocks to the vein are not altered, and only one vein has been identified at this prospect. A sample collected along 50 feet of the vein contained 48.9 percent antimony, 0.02 ounce of gold per ton, and 0.2 ounce of silver per ton (Ebbley and Wright, 1948). The sedimentary rocks may either be part of the mid-Cretaceous Kuskokwim Group (Hoare and Coonrad, 1959), or possibly an upper Paleozoic or Mesozoic section correlative with parts of the Gemuk Group (Bundtzen and Laird, 1991). The nearby granitic rocks may be part of a Cretaceous or Tertiary igneous assemblage that is widespread through southwest Alaska.
  • Age = Cretaceous or Tertiary . The vein crosscuts clastic sedimentary rocks that may range in age from lare Paleozoic to mid-Cretaceous (Bundtzen and Laird, 1991). The nearby granitic rocks may be Cretaceous or Tertiary.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Aniak

Comments on the workings information

  • Workings / Exploration = Cady and others (1955) reported that claims have been staked on the prospect. Some small pits or trenches are probably present.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Ebbley and Wright, 1948

General comments

Subject category Comment text
Deposit Model Name = Simple Sb deposits (Cox and Singer, 1986; model 27d)

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JUN-01 Travis L. Hudson Applied Geology
Reporter 10-JUN-01 Travis L. Hudson Applied Geology

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Authoritative Alaska resources

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