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  3. Mineral Resource Data System (MRDS)

Nunatak Prospect

Occurrence in Alaska, United States with commodities Molybdenum, Copper, Silver
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10000498
MRDS ID A010685
Record type Site
Current site name Nunatak Prospect

Geographic coordinates

Geographic coordinates: -136.10488, 58.98723 (WGS84)

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Fairweather D-1(quadrangle 1:63,360 scale)

Juneau NW(quadrangle 1:100,000 scale)

Mount Fairweather(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Glacier Bay(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Glacier Bay National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Molybdenum Primary
Copper Secondary
Silver Secondary

Comments on the commodity information

  • TETRAHEDRITE, ENARGITE, AND BORNITE WERE FROM OUTSIDE MOLYBDENITE AREA IN EPIDOTE SKARN

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Enargite Ore
Molybdenite Ore
Tetrahedrite Ore
Quartz Gangue

Alteration

  • (Local) Silicified Zone At Margin Of Porphyry

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Permian
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels

Nearby scientific data

(1) -136.10488, 58.98723
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Deposit Memory In Contact Aureole Of Quartz Monzonite Porphyry

Ore body information

  • Length 1524M
    Width 304.8M
    Depth to top 0M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1941

Mining district

District name Juneau District

Land status

Ownership category National Park

Reserves and resources

  • Type In-situ
    Estimate year 1978
    Total resources 65000mt ore
    Commodity Subtype Grade units Group Importance Year
    Molybdenum Mo 0.04 wt-pct Molybdenum Major 1978

Comments on the workings information

  • DRILLING & SURFACE EXPLORATION ONLY

Comments on development

  • DIAMOND DRILLING & SURFACE EXPLORATION

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MAINLY STOCKWORK OF QUARTZ VEINLETS IN CONTACT AUREOLE AROUND QUARTZ MONZONITE PORPHYRY. MOLYBDENITE ALONG MARGINS OF QUARTZ VEINLETS. A GOOD SIZED LOW GRADE PORPHYRY MO DEPOSIT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1984 Elliott, R. L. 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.