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

Liberty Mine

Past Producer in Calaveras county in California, United States with commodities Chromium, Iron
Map
XML
JSON
KML
C
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10187534
MRDS ID M004640
MAS/MILS ID 0060090561
Record type Site
Current site name Liberty Mine
Alternate or previous names Mcfall
Related records 10027953

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.5541, 37.95601 (WGS84)
Elevation 302
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New Melones Dam(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001 N 013 E 09 NESENW California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Asbestos Unknown
Chromite Unknown
Olivine Unknown
Pyroxene Unknown
Serpentine Unknown

Nearby scientific data

Main Entrance (1) -120.5541, 37.95601
ListMap

Economic information

Ore body information

  • Area 1HA
    Field Value
    Total Surface Area (HA) 1
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1917
Year of first production 1917

Mining district

District name Carson Hill

Mineral rights holdings

Type of mineral rights Other

Land status

Ownership category Federal

Ownership information

  • Type Owner
    Owner California Chrome Co.-Last Operator-1918
    Home office California
    Year 1976
  • Type Owner
    Owner U.S. Bureau Of Land Management - Sacramento Office
    Interest 100
    Home office California
    Year 1976

Comments on the reserve resource information

  • NO RESERVE ESTIMATE REPORTED. 282TONS OF ORE AVERAGING 47-48 T CR2O3 PRODUCED FROM 1917-1918. MINE NOW ON BLM LAND. THE AVERAGE MINABLE GRADE OF CHROMITE IS 47.5 PERCENT. INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 04.47,CR2O3 48.42,FEO 11.89,TOTAL FE 13.68,AL203 15.35,MGO CR/FE 3.12.

Workings at the site

  • Type of workings Surface
    Area 1HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Swell Factor .6
    Avg. Overburden Thickness 0
    Primary Material Cover M-HARD ROCKS
    Percentage 100
    Hardness of Ore M-HARD ROCKS
  • Type of workings Underground
    Length 59M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OVERHAND 10-38
    Swell Factor .6
    Hardness of Rock HARDROCK FISSURED WITH EXCESSIVE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Length of Inclines (m) 30
    Slope of Inclines 72
    Number of Inclines 2
    Avg. Length of Adits (m) 10
    Number of Adits 1
    1st Condition of Workings OPEN
    2nd Condition of Workings CAVED AT PORTAL
    3rd Condition of Workings NO MINE ENTRY

Reference information

Bibliographic references

  • Deposit

    CAL. DIV. MINES GEOL BULL 134,PT3CHAP.2, P.41,PL.5

  • Deposit

    CAL. COUNTY REPT NO.2,P.129 1962

  • Deposit

    COOP WAR MINERAL INVEST, CALAVERAS CO. NO.3, UNPUBL. TALIAFE

Reporter information

Type Date Name Affiliation Comment
Reporter 05-NOV-1984 Unknown U.S. Bureau of Mines

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.