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Bornite, Ruby Creek

Prospect in Alaska, United States with commodities Copper, Silver, Gold, Cobalt, Lead, Uranium, Zinc
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10096766
MRDS ID A010661
Record type Site
Current site name Bornite, Ruby Creek

Geographic coordinates

Geographic coordinates: -156.9504, 67.0626 (WGS84)
Relative position Location along Ruby Creek on the north side of the Cosmos Hills in T. 19 N., R. 9 E., Kateel River Meridian. Shown as locality 24 in Mayfield and Grybeck (1978). Location accurate to within 600 ft. (200 m).

Site location context

Political divisions (FIPS codes)

Northwest Arctic(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ambler River A-2(quadrangle 1:63,360 scale)

Ambler River SE(quadrangle 1:100,000 scale)

Ambler River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Kobuk River(hydrologic unit)

Kobuk-Selawik Rivers(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Gold Secondary
Cobalt Critical Secondary
Lead Secondary
Uranium Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Germanite Ore
Bornite Ore
Carrollite Ore
Chalcocite Ore
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Renierite Ore
Tennantite Ore
Tetrahedrite Ore
Cymrite Gangue
Barite Gangue
Dolomite Gangue
Marcasite Gangue
Pyrite Gangue
Pyrrhotite Gangue

Alteration

  • (Local) Dolomite

Mineral occurrence model information

Model code 233
USGS model code 32c
Deposit model name Kipushi Cu-Pb-Zn (BC name is Carbonate-hosted Cu)
Mark3 model number none

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) -156.9504, 67.0626
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Sulfide minerals form matrix of breccia replacement deposits in brecciated and intensely folded and faulted dolomite and limestone of the Devonian Bornite marble, a 3000-ft.-thick (1000 m) unit of carbonate rocks. Deposit is structurally and stratigraphically confined to a sequence of Devonian dolomite, limestone, and calcareous phyllite (Kennecott Exploration Co., written comm., 1997).?The deposit is interpreted (Hitzman, 1986, p. 1644-1674) to have formed along a rifted continental margin in Late Devonian time. It occurs along a fault (?)-contolled margin of a carbonate bank adjacent to a shale-filled graben.??
  • Age = Late Devonian

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Active

Mining district

District name Shungnak

Reserves and resources

  • Type In-situ
    Estimate year 1983
    Total resources 18000mt ore
    Remarks Entry carried over from Old MRDS or added later (i.e. it did not originate in ARDF)
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2 wt-pct Copper Major 1983
  • Type In-situ
    Estimate year 1975
    Total resources 2000mt ore
    Remarks Entry carried over from Old MRDS or added later (i.e. it did not originate in ARDF)
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 4.5 wt-pct Copper Major 1975

Comments on the reserve resource information

  • Reserves = Estimate by Kennecott Exploration Co. of 50 million tonnes averaging 1.2% Cu with 454,000 tonnes grading up to 4% Cu. Some samples reach 0.02% eU but the U content of the ore is apparently negligible (Matzko and Freeman, 1963). Undisclosed amounts of Zn and Co (Bundzten and others, 1995, p. 56).

Comments on the workings information

  • Workings / Exploration = Exploration shaft, drifts on two levels, and extensive core drilling have been completed (Kennecott Exploration Co., written comm., 1997).??

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Hitzman, 1986

General comments

Subject category Comment text
Deposit Model Name = Kipushi

Reporter information

Type Date Name Affiliation Comment
Reporter 30-APR-97 R.L. Elliott U.S. Geological Survey
Reporter 30-APR-97 J.M. Schmidt U.S. Geological Survey
Reporter 30-APR-97 S.W. Nelson 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.