Black Mt. Prospect

Occurrence in Alaska, United States with commodities Tin, Tungsten, Lead, Zinc
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10003213
MRDS ID A016023
Record type Site
Current site name Black Mt. Prospect
Alternate or previous names Helen Fault
Related records 10208837, 10208872

Geographic coordinates

Geographic coordinates: -166.74229, 65.48345 (WGS84)
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Teller B-4(quadrangle 1:63,360 scale)

Teller SE(quadrangle 1:100,000 scale)

Teller C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Imuruk Basin(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Brevig Mission Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS PROF. PAPER 575-B, FIG. 1, P. B22. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Tin Critical Primary
Tungsten Critical Primary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Cassiterite Ore
Galena Ore
Sphalerite Ore
Wolframite Ore
Fluorite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Topaz Gangue
Tourmaline Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Black Mt. Stock;;;
    Rock description Black Mt. Stock;;;

Nearby scientific data

(1) -166.74229, 65.48345

Economic information

Geologic structures

Type of structure Regional
Structure description Core Of Normally-Faulted Domal Uplift
Type of structure Local
Structure description Helen Fault, N 20 Degrees E Striking High-Angle Normal Fault Forms Nw Border Of Stock

Ore body information

  • Strike N 20 DEGREES E
    Dip NW

Controls for ore emplacement

  • Fault Controlled

Comments on the geologic information

  • PARTIALLY FAULT-BOUNDED GRANITE STOCK [0.4 SQ KM] INTRUDED INTO PRECAMBRIAN CARBONACEOUS METASED. ROCKS, ALTERED TO ANDALUSITE HORNFELS AT CONTACT; NEARBY PRECAMBRIAN ARGILLACEOUS LIMESTONE ALTERED TO TACTITE. BLACK MT. STOCK; MED-GR. SUBEQUIGRANULAR BIOTITE GRANITE, LOCALLY GREISENIZED.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1963

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
Deposit CASSITERITE AND WOLFRAMITE-BEARING TOPAZ-FLUORITE VEINS ALONG FAULT CONTROLLED GRANITE CONTACT; ADJACENT QUARTZ-TOPAZ GREISEN CONTAINING CASSITERITE, PYRITE, PYRRHOTITE, SPHALERITE AND GALENA.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey
Editor 20-SEP-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.

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.