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Bohemia Basin Prospect

Prospect in Alaska, United States with commodities Nickel, Copper, Cobalt
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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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10000500
MRDS ID A010689
Record type Site
Current site name Bohemia Basin Prospect

Geographic coordinates

Geographic coordinates: -136.42427, 57.97471 (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

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

Sitka NW(quadrangle 1:100,000 scale)

Sitka W OE(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Tongass 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

Comments on the location information

  • SMALL PROSPECTS, SIMILAR TO BOHEMIA BASIN DEPOSITS, OCCUR CLEAR OVER TO WEST COAST OF YAKOBI ISLAND LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Nickel Critical Primary
Copper Primary
Cobalt Critical Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Pentlandite Ore
Pyrrhotite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite

Nearby scientific data

(1) -136.42427, 57.97471
ListMap

Economic information

Ore body information

  • General form OTHER TROUGHLIKE
    Thickness 45.72M
    Depth to top 0M

Controls for ore emplacement

  • Near Base Of Basin-Shaped Norite Body

Comments on the geologic information

  • DEPOSIT IN NORITE UNIT OF GABBROIC TO GRANITIC INTRUSIVE COMPLEX WHICH HAS INTRUDED MESOZOIC METAVOLCANIC, METASEDIMENTARY, AND GRANITIC ROCKS.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1920

Mining district

District name Chichagof District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Inspiration Development, Inc.
  • Type Owner
    Owner Aleco, Inc.

Comments on the workings information

  • EXPLORED BY TUNNEL, TRENCHES & PITS, DRILLING, ETC., OVER 60 YEARS, BUT NO PRODUCTION. MAY BE MINED BY OPEN PIT METHODS WITH 2.5 TO 1 STRIPPING RATIO.

Comments on development

  • MUCH RECENT, 1970'S (& EARLY 1980'S ?), DRILLING BY INSPIRATION. INSPIRATION REPORTED TO HAVE DROPPED PROPERTY IN 1982.

Reference information

Bibliographic references

  • Deposit

    USGS OFR 78-450, P. 20-22

  • Deposit

    USGS B 947-C, P. 41-56

  • Deposit

    USGS B 931-F, P. 105-138

  • Deposit

    MINING ENGINEERING, MAY 1983, P. 414

  • Deposit

    ADGGS SPEC REPT 31, P. 15

  • Reserve-Resource

    MINING ENGINEERING, MAY 1983 AND ADGGS SPEC REPT 31

General comments

Subject category Comment text
Deposit TROUGHLIKE DEPOSIT NEAR BASE OF BASIN-SHAPED BODY OF NORITE. SEVERAL SEPARATE SULFIDE BODIES.

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.