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Round Valley Mine

Past Producer in Inyo county in California, United States with commodity Tungsten
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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. 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 10163900
MRDS ID D000863
MAS/MILS ID 0060270009
Record type Site
Current site name Round Valley Mine
Alternate or previous names Tungsten Hill Mine Dmea-2256, Silver Bell, Silver Ball, Little Shot, Big Shot, Noble's Camp, Haco, Western Tungsten Mine
Related records 10008560

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -118.55514, 37.37854 (WGS84)
Elevation 5115
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Inyo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rovana(quadrangle 1:24,000 scale)

Bishop(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Crowley Lake(hydrologic unit)

Mono-Owens Lakes(hydrologic accounting unit)

Northern Mojave-Mono Lake(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 Inyo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006 S 031 E 34 S2S2E2 California

Commodities

Commodity Importance
Tungsten Critical Tertiary

Materials information

Materials Type of material
Calcite Unknown
Garnet Unknown
Quartz Unknown
Scheelite Unknown

Nearby scientific data

Main Entrance (1) -118.55514, 37.37854
ListMap

Economic information

Ore body information

  • Thickness 60M
    Length 245M
    Width 30M
    Area 6HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 REPLACEMENT
    Shape of Orebody #1 IRREGULAR
    Type of Orebody #2 DISSEMINATED
    Type of Orebody #3 FISSURE VEIN
    Primary mode of Origin CONT METASOMATIC
    Secondary mode of Origin METAMORPHISM
    Primary Ore Control CONTACT ZONE
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. SLIGHT
    Type of Wallrock Alter. #1 UNKNOWN
    Avg. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 6
    Date of Last Modification 830712

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1917

Mining district

District name Bishop

Mineral rights holdings

Type of mineral rights Located Claim

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner James B Bennett-Roundvalley Tung
    ID 404581
    Home office California
    Year 1972

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Capacity 100
    Capacity Units MT COMMOD/DAY
    Unit Production Cost 25
    Units of Production $/MT COMMOD
    Year of Information 1973

Reference information

Bibliographic references

  • Deposit

    DMEA-4614

  • Deposit

    U. S. GEOLOGICAL SURVEY BULLETIN 922-Q, 1940, P. 511-514.

  • Deposit

    CALIF. JOUR. MINES AND GEOL., V. 46, 1950, P. 39-40.

  • Deposit

    CALIF. JOUR. MINES AND GEOL., V. 47, 1951, P. 94-95.

Reporter information

Type Date Name Affiliation Comment
Reporter 31-MAR-1991 Western Field Operations Center (WFOC) U.S. Bureau of Mines

Beyond USGS

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

Current status (per MSHA)

StatusAbandoned since 12/29/1982
MSHA mine ID0404581
Mine name (MSHA)Round Valley Mine
Current operatorInspiration Mines Inc
Current controller (parent)Terra Industries Inc
Mine typeUnderground (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

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.