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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Black Bear

Past Producer in Nevada county in California, United States with commodity Gold
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Production statistics
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10007229
MRDS ID C010850
Record type Site
Current site name Black Bear
Alternate or previous names Forlorn Hope
Related records 10261425

Geographic coordinates

Geographic coordinates: -121.14937, 39.24461 (WGS84)
Elevation 488
Relative position 2 1/2 MILES FROM ROUGH & READY ON DEER CREEK

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rough And Ready(quadrangle 1:24,000 scale)

Yuba City(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Nevada

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 016N 007E 13,14,23,24 California

Comments on the location information

  • UTM ACC. - SW 1/4 SEC. 13

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -121.14937, 39.24461
ListMap

Economic information

Ore body information

  • Strike N
    Dip 55 W
    Thickness 6.71M
    Depth to top 0M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Production statistics

  • Year 1893
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 6g/mt
  • Year 1917
    Period 1914 - 1917
    Accuracy Estimate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 8g/mt

Workings at the site

  • Type of workings Surface/Underground
    Length 182.88M
    Overall depth 60.96M

Comments on the workings information

  • 3 ADITS, INCLINE, WINZES RAISES ETC.

Reference information

Bibliographic references

  • Deposit

    MACBOYLE, E., 1919 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 16 , P. 122 - 123 .

  • Deposit

    LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , P. 386 .

  • Production

    LOGAN 1941

General comments

Subject category Comment text
Deposit VEIN, AVG. 3 FT. THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Bowman, J. And Albers, J. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.