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Brown Bear Mine

Past Producer in Lemhi county in Idaho, United States with commodities Cobalt, Copper, Gold, Bismuth, Nickel, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. Reporter information

Geologic information

Identification information

Deposit ID 10105645
MRDS ID W013475
Record type Site
Current site name Brown Bear Mine
Included sites Blackbird Mine

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -114.35218, 45.12936 (WGS84)
Elevation 2377
Location accuracy 100(meters)
Relative position 20 MI. W. OF SALMON, ID.

Site location context

Political divisions (FIPS codes)

Lemhi(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gant Mountain(quadrangle 1:24,000 scale)

Bighorn Crags(quadrangle 1:100,000 scale)

Elk City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Salmon-Panther(hydrologic unit)

Salmon(hydrologic accounting unit)

Lower Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Salmon-Challis National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Idaho Lemhi

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 021N 018E 21 Idaho

Comments on the location information

  • 1 MI. UP MEADOW CREEK. N.W. OF UNCLE SAM MINE

Commodities

Commodity Importance
Cobalt Critical Primary
Copper Primary
Gold Secondary
Bismuth Critical Tertiary
Nickel Critical Tertiary
Silver Tertiary

Materials information

Materials Type of material
Bismuth Ore
Chalcocite Ore
Chalcopyrite Ore
Cobaltite Ore
Gold Ore
Magnetite Gangue
Pyrite Gangue
Pyrrhotite Gangue

Alteration

  • (Local) Oxidation

Analytical data

Result 2% CU, 0.7% CO, 0.04 OZ AU/TON, (DUMP SAMPLE)
Result GENERAL RATIO CO TO CU IS 1:0.95
Result .8 % NI

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Rock unit name Diabase, Diorite Dikes
    Rock description Diabase, Diorite Dikes
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Belt Supergroup
    Rock description Belt Supergroup-Schist

Nearby scientific data

Main Entrance (1) -114.35218, 45.12936
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Reverse Faults, Folds, Schistosity. Zone On Anticlinal Structure Plunging 40 Deg N; Brown Bear Fault Striking N 55-70 Deg W And Dipping 55 Deg Ne Offsets Ore 80 Ft

Ore body information

  • General form IRREGULAR PODS
    Strike N 30 DEG W
    Dip 49 DEG NE
    Length 457.2M
    Width 6.1M

Controls for ore emplacement

  • Shear Zone, Reverse Faults

Comments on the geologic information

  • ORE LOCATED ALONG EXTENSIVE REVERSE FAULTS; SHEAR ZONE TRENDS N

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1951

Mining district

District name Blackbird District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Howe Sound Mining Co.
  • Type Owner
    Owner Hanna Mining Co.

Workings at the site

  • Type of workings Underground
    Length 152.4M
    Overall depth 91.44M

Comments on the workings information

  • MINED IN CONJUNCTION WITH CHICAGO LODE.

Comments on development

  • BROWN BEAR MINE NOW INCLUDED IN BLACKBIRD MINE, SEE NO. 363 ; ECON.COM: CO HAS EXTRACTION PROBLEMS

Reference information

Bibliographic references

  • Deposit

    UMPLEBY, J.B., 1913, GEOLOGY AND ORE DEPOSITS OF LEMHI COUNTY, IDAHO: USGS BULL. 528, 182 P.

  • Deposit

    ANDERSON, A.L., 1943, PRELIMINARY REPORT ON THE COBALT DEPOSITS IN THE BLACKBIRD DISTRICT, LEMHI COUNTY, IDAHO: IDAHO BUREAU OF MINES AND GEOLOGY PAMPHLET 61, 34 P.

  • Deposit

    CANNEY, F.C., 1953, PRELIMINARY REPORT OF GEOCHEMICAL INVESTIGATIONS IN THE BLACKBIRD DISTRICT, LEMHI COUNTY, IDAHO: USGS OPEN-FILE REPT.

  • Deposit

    REED, G.C., AND HERDLICK, J.A., 1947, BLACKBIRD COBALT DEPOSITS, LEMHI COUNTY, IDAHO: USBM REPT. INV. 4012, P. 5

  • Deposit

    6) TREXLER, B.D., JR., 1974, UNPUBLISHED BLACKBIRD REPORT

  • Deposit

    1913 GEOLMAP UMPLEBY, J. B., BULL. 528

  • Deposit

    1943 RECON IDA. BUREAU OF MINES & GEOL. PAMPHLET 61.

  • Deposit

    1947 DIREXPL USBM, R.I. 4012

  • Deposit

    1953 GEOCHEM CANNEY, F.C., OPEN-FILE REPT

  • Production

    BALDWIN, J.A., OCTOBER 8, 1976, PERSONAL COMMUNICATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1975 Ortman, Dale; Miller, Pat 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