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Big Bear

Producer in Josephine county in Oregon, United States with commodities Chromium, Rhodium
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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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10043130
MRDS ID M061636
Record type Site
Current site name Big Bear
Related records 10128458

Geographic coordinates

Geographic coordinates: -123.60922, 42.40288 (WGS84)
Elevation 829
Relative position 9 MI NORTH OF SELMA, 24 MI WEST OF GRANTS PASS

Site location context

Political divisions (FIPS codes)

Josephine(county)

Oregon(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Onion Mountain(quadrangle 1:24,000 scale)

Grants Pass(quadrangle 1:100,000 scale)

Medford(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Applegate(hydrologic unit)

Southern Oregon Coastal(hydrologic accounting unit)

Oregon-Washington Coastal(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Rogue River-Siskiyou National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Oregon Josephine

Public Land Survey System information

Meridian Township Range Section Fraction State
Willamette 036S 008W 35 NW4 OF NE4 Oregon

Comments on the location information

  • ON NORTH SIDE OF CEDAR LOG CREEK. LOCATION GIVEN IS FOR MINE SYMBOL SHOWN ON TOPO MAP.

Commodities

Commodity Importance
Chromium Critical Primary
Rhodium Critical Tertiary

Materials information

Materials Type of material
Chromite Ore
Serpentine Gangue

Alteration

  • (Local) Serpentinization

Analytical data

Result RH=17 PPB

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Pearsoll Peak Ophiolite
    Rock description Pearsoll Peak Ophiolite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -123.60922, 42.40288
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Shearing

Ore body information

  • General form LENS, STRINGERS, SOME MASSIVE ORE
    Strike NORTH-N 30 W
    Dip 68 W-VERTICAL
    Length 121.92M

Controls for ore emplacement

  • Magmatic Segregation

Comments on the geologic information

  • DEPOSIT LIES CLOSE TO THE GALICE ROCKS

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category National Forest
Area name Siskiyou National Forest

Ownership information

  • Type Operator
    Owner Stevens, Carl
    First year 1958
  • Type Owner
    Owner Wallace, Melvin
    First year 1961

Production statistics

  • Year 1952
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^50% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 50wt-pct
  • Year 1953
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^43% Cr2o3, 48% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 46wt-pct
  • Year 1957
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^48% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 48wt-pct
  • Year 1958
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^49% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 49wt-pct
  • Year 1958
    Period 1952-1958
    Material TOTAL
    Accuracy Estimate
    Description Cp_Grade: ^48.50 % Cr2o3 (Weighted Average Grade)
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 49wt-pct

Comments on the production information

  • RAMP (1961) ESTIMATES 900 TONS PRODUCTION AT 45-50% CR2O3 WITH CR:FE=3, THAYER RECORDS DO NOT AGREE

Workings at the site

  • Type of workings Surface/Underground
    Length 182.88M

Comments on the workings information

  • 190 FT TUNNEL, 20 FT STOPE, 75 FT RAISE, 60 FT RAISE, AND EXTENSIVE BULLDOZER CUTS

Comments on development

  • WORKED DURING WWI

Reference information

Bibliographic references

  • Deposit

    RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 52, P. 133.

  • Deposit

    THAYER, T.P., 1974, U.S. GEOLOGICAL SURVEY, UNPUB. DATA.

  • Deposit

    PAGE, N.J, JOHNSON, M.G., HAFFTY, JOSEPH, AND RAMP, LEN, 1975, OCCURRENCE OF PLATINUM GROUP METALS IN ULTRAMAFIC ROCKS OF THE MEDFORD-COOS BAY 2 DEGREE QUADRANGLE, SOUTHWESTERN OREGON: U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-694, SCALE 1:250,000.

  • Deposit

    RAMP, LEN, AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON: OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES BULLETIN 100, TABLE 1.

General comments

Subject category Comment text
Deposit LARGER LENSES HAD 200 TONS OF ORE. WAS DIAMOND DRILLED IN 1957

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Johnson, Maureen G. U.S. Geological Survey
Updater 01-FEB-1981 Ferns, Mark L. (Brooks, Howard C.) Oregon Department of Geology and Mineral Industries
Updater 01-MAY-1989 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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