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  3. Mineral Resource Data System (MRDS)

East of Davison Bay Nickel-Copper Prospect

Occurrence in Alaska, United States with commodities Nickel, Copper
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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. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10002340
MRDS ID A013254
Record type Site
Current site name East of Davison Bay Nickel-Copper Prospect

Geographic coordinates

Geographic coordinates: -136.30954, 57.78554 (WGS84)
Elevation 18
Relative position EAST SHORE OF DAVISON BAY

Site location context

Political divisions (FIPS codes)

Sitka(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sitka D-7(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)

West Chichagof-Yakobi Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 947-C, PLATES 15, 18 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

Comments on the commodity information

  • ANALYTICAL DATA FROM USGS B 947-C, P. 63.

Materials information

Materials Type of material
Chalcopyrite Ore
Pentlandite Ore
Pyrrhotite Ore
Plagioclase Gangue
Pyroxene Gangue

Analytical data

Result AVERAGE GRADE OF 0.16% NI, 0.03% CU FROM DRILL HOLE
Result 0.2% NI, 0.1% CU FROM 34 SURFACE SAMPLES.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite
  • Host or associated Associated
    Rock type Metamorphic Rock > Amphibolite
  • Host or associated Associated
    Rock type Plutonic Rock > Pegmatite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite

Nearby scientific data

(1) -136.30954, 57.78554
ListMap

Economic information

Ore body information

  • Thickness 18.29M
    Length 304.8M
    Width 76.2M
    Depth to bottom 18.29M

Comments on the geologic information

  • NORITE BODY PART OF COMPOSITE STOCK INTRUDED INTO METAMORPHOSED GRAYWACKE AND GREENSTONE. GRANITIC PEGMATITE DIKES INTRUDE NORITE BODY.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1911

Mining district

District name Chichagof

Land status

Ownership category National Forest

Comments on the reserve resource information

  • ESTIMATED RESERVES ARE AT LEAST SEVERAL MILLION TONS OF MATERIAL AT AVERAGE GRADE OF 0.2% NI AND 0.1% CU, ACCORDING TO USGS B 947-C, P. 63.

Comments on the workings information

  • 45 PROSPECT PITS OF VARYING SIZES DUG IN 1941. ONE 260 FT. DIAMOND DRILL HOLE DRILLED IN 1942 BY USBM.

Comments on development

  • DIAMOND DRILLING BY USBM IN 1942. NUMEROUS ACTIVE CLAIMS IN AREA AS OF 1977. 45 PROSPECT PITS DUG BY CLAIM OWNERS IN 1941

Reference information

Bibliographic references

  • Deposit

    USGS 947-C, P. 56-63, PL. 15, 18 (1946)

  • Deposit

    USGS 936-I, P. 221-243 (1942)

  • Deposit

    USGS MF-467, LOC. 16 (1972)

  • Deposit

    USGS OF 78-450, P. 82-84 (1978)

  • Deposit

    USBM OFR 20-73, LOC. 153B (1978)

  • Other Database

    BAG-B-947-C-PL-15,18

General comments

Subject category Comment text
Deposit LUMPED INTO SAME DEPOSIT AS SI-16 (MIRROR HARBOR) AND SI-17 (DAVISON BAY) BY COBB IN MF-467, LOC. 16 AND OF 78-450, P. 82-84. ; INFO.SRC : 1 PUB LIT
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
Deposit DISSEMINATED PYRRHOTITE, PENTLANDITE, CHALCOPYRITE IN NORITE BODY SURROUNDED BY BARREN NORITE, AMPHIBOLITE, AND GABBRO. NO PRODUCTION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Leonard, Kenneth R. (Huber, Donald F.) 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.