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Dolman

Past Producer in Mariposa county in California, United States with commodities Gold, Silver, Copper, Iron
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Ownership information
  14. Production statistics
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10031027
MRDS ID M009581
Record type Site
Current site name Dolman
Alternate or previous names Oyler Lode, Hickman, Bear Valley
Related records 10140146

Geographic coordinates

Geographic coordinates: -120.10877, 37.54965 (WGS84)
Relative position 1 1/2 MI. S OF BEAR VALLEY

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bear Valley(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fresno River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 017E 29,33 California

Comments on the location information

  • UTM EST. SE 1/4 29 , NW 1/4 33 . SEC. LINES PROJECTED.

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Tertiary
Iron Tertiary

Comments on the commodity information

  • 60 % OF GOLD IS FOUND IN SULFIDE MINERALS

Materials information

Materials Type of material
Gold Ore
Pyrite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Stratigraphic age (youngest) Late Jurassic

Economic information

Ore body information

  • General form PINCH & SWELL
    Strike N 35 W
    Dip 60 SW
    Thickness 1.52M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • GEOL.DESC: VEIN VARIES FROM LESS THAN A FT. TO 5 FT. IN PYROXENE ANDESITE GREENSTONES. ORE SHOOTS LESS THAN 30 FT. IN WIDTH.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1894
Production years 1902 , 1939 - 1940

Ownership information

  • Type Owner
    Owner Ellen T. Simpson, Et. Al.

Production statistics

  • Year 1940
    Period - 1940
    Material AU
    Accuracy Accurate
    Description Cp_Grade: ^.06 Oz/Ton Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2g/mt
  • Year 1941
    Period - 1941
    Material AG
    Accuracy Accurate
    Description Cp_Grade: ^.003 Oz/Ton Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Silver Silver 0g/mt

Comments on the production information

  • DURING OPERATIONS WHICH BEGAN IN 1902, OFFICIAL RECORDS INDICATE 59.1 TONS OF ORE SHIPPED WHICH RETURNED $756.78, OR AN AVERAGE OF $12.80 PER TON. DURING 1939 AND 1940 SOME 393 TONS OF ORE SHIPPED YIELDED 24 OZ. GOLD AND 7 OZ. SILVER. IDLE SINCE 1940.

Comments on the workings information

  • THE TOTAL AREA COVERS 1 1/2 MI. OF THE LODE.

Reference information

Bibliographic references

  • Deposit

    BOWEN, O. E., JR., & GRAY, H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIF.: CALIF. JOUR. MINES & GEOL., VOL. 53 , NOS. 1 & 2 , P. 94 - 5 , 255 .

  • Deposit

    LAIZURE, C. MCK., 1935 , CURRENT MINING ACTIVITIES IN THE SAN FRANCISCO DISTRICT WITH SPEC. REF. TO GOLD: CALIF. JOUR. MINES & GEOL., VOL. 31 , NO. 1 , P. 30 - 32 .

  • Production

    BOWEN & GRAY, 1957

General comments

Subject category Comment text
Deposit VEIN, ORE SHOOTS
Deposit FORMERLY THE OYLER LODE ON THE FREMONT GRANT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1978 Hayden, F. (Albers, J.) 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.