1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Spruce Hen Prospect

Occurrence in Alaska, United States with commodities Tungsten, Molybdenum
Map
XML
JSON
KML
C
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. 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 10002826
MRDS ID A015298
Record type Site
Current site name Spruce Hen Prospect
Related records 10160331

Geographic coordinates

Geographic coordinates: -147.51962, 64.95745 (WGS84)
Location accuracy 1000(meters)
Relative position 11 MILES NE OF FAIRBANKS

Site location context

Political divisions (FIPS codes)

Fairbanks North Star(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fairbanks D-2(quadrangle 1:63,360 scale)

Big Delta NW(quadrangle 1:100,000 scale)

Fairbanks(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-410, LOC. 29. PROSPECT ON THE DIVIDE BETWEEN THE HEADWATERS OF STEELE AND FIRST CHANCE CREEKS. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Tungsten Critical Primary
Molybdenum Tertiary

Materials information

Materials Type of material
Molybdenite Ore
Scheelite Ore
Calcite Gangue
Clinozoisite Gangue
Diopside Gangue
Garnet Gangue
Hornblende Gangue
Vesuvianite Gangue

Alteration

  • (Local) Ground-Water Leaching Of Scheelite In Weathered Zone May Have Occured

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -147.51962, 64.95745
ListMap

Economic information

Comments on the geologic information

  • SEAMS OF GOUGE ALONG WALLS OF LODE. DEPOSIT ALONG WESTERN PERIPHERY OF LARGE BODY OF PORPHYRITIC GRANITE. SCHEELITE CONCENTRATIONS IN ZONES AS MUCH AS 6 IN. WIDE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Fairbanks

Comments on the workings information

  • WORKINGS CONSISTED OF A 70 FT. INCLINED SHAFT, PITS, AND TRENCHES

Comments on development

  • CLAIMS STAKED BY SUMMER, 1916. 5 LODES PROSPECTED BY TRENCHES. NO RECORD OF ANY PRODUCTION.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SMALL GRAINS OF SCHEELITE ARE DISSEMINATED THROUGHOUT 5 LODES AS MUCH AS 4 FT. WIDE IN SCHIST WITH SOME INTERBEDDED LIMESTONE AND METAMORPHOSED BASIC IGNEOUS ROCK. LODES ARE SKARN DEPOSITS WITH SCHEELITE, FLUORITE, GARNET, AND OTHER TYPICAL CONTACT-METAMORPHIC MINERALS THAT REPLACED LIMESTONE; ABOUT 3 FT. THICK. ONE LODE IS CUT BY BY SCHEELITE-BEARING QUARTZ VEIN. SCHEELITE IN ZONES IN BLOCKS OF ALTERED IGNEOUS ROCK (MAINLY HORNBLENDE) ON DUMP. A LITTLE MOLYBDENITE REPORTED IN ORE
Deposit NO GOLD ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Powers, M.T. (Huber, D.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.

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.