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  3. Mineral Resource Data System (MRDS)

West Point

Past Producer in Nevada county in California, United States with commodities Gold, Lead, Copper
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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. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10007432
MRDS ID C011282
Record type Site
Current site name West Point
Alternate or previous names California, Pittsburg and Pittsburg Ext.
Related records 10140075

Geographic coordinates

Geographic coordinates: -121.12021, 39.20267 (WGS84)
Elevation 732
Relative position 3 1/2 MI W GRASS VALLEY

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Grass Valley(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 008E 31 California

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Vein Oxidized To Depth Of 200 Ft

Analytical data

Result HIGH ASSAYS REPORTED IN UPPER LEVELS

Host and associated rocks

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

Nearby scientific data

(1) -121.12021, 39.20267
ListMap

Economic information

Ore body information

  • Strike N 30 E
    Dip 65 NW
    Depth to top 0M

Economic information about the deposit and operations

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

Mining district

District name Rough & Ready

Production statistics

  • Year 1875
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 32g/mt

Comments on the production information

  • NO OTHER PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Underground
    Length 457.2M
    Overall depth 73.15M

Comments on the workings information

  • INCLINE, DRIFTS, SHAFTS

Reference information

Bibliographic references

  • Deposit

    MACBOYLE, E., 1918 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 16 , P. 130 - 1 , 257 - 8

  • Production

    MACBOYLE, ( 1918 )

General comments

Subject category Comment text
Deposit 20 ACRES, 2 CLAIMS. SEE CALIFORNIA. ; INFO.SRC : 1 PUB LIT
Deposit VEINS, 2 , 50 FT APART, AVG. 1 FT THICK, 5 - 10 % SULFIDES. SEVERAL INCHES OF GOUGE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-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.

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.