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B and M

Past Producer in Mariposa county in California, United States with commodities Gold, Silver
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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. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10031186
MRDS ID M009808
Record type Site
Current site name B and M
Alternate or previous names Fournier
Related records 10115364

Geographic coordinates

Geographic coordinates: -119.98654, 37.43854 (WGS84)
Relative position 4 MI. S OF MARIPOSA

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mariposa(quadrangle 1:24,000 scale)

Shaver Lake(quadrangle 1:100,000 scale)

Mariposa(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 006S 018E 03 California

Comments on the location information

  • NEAR BUCKEYE CREEK UTM EST.

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Silver Ore
Quartz Gangue

Analytical data

Result ONLY 3 % SULFIDE ORE

Host and associated rocks

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

Nearby scientific data

(1) -119.98654, 37.43854
ListMap

Economic information

Ore body information

  • Strike N 55 W
    Dip SW
    Thickness 1.83M
    Depth to bottom 33.53M

Controls for ore emplacement

  • Pockets Collect Around Short Stringers Of Pyrite On A Slate Core - Ref. 3

Comments on the geologic information

  • GEOL.DESC: EAST VEIN AT SURFACE APPARENT DIP 70 DEGREES, TWO PARALLEL VEINS IN BIOTITE HORNBLENDE QUARTZ DIORITE WALL ROCKS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1911 - 1914 , 1934 - 1939

Comments on the production information

  • LAST KNOWN PERIOD OF ACTIVITY WAS 1934-39 WHEN 55 TONS OF ORE WERE SHIPPED WHICH YIELDED $5000 IN GOLD AND SILVER. MAY BE SAME PROPERTY FROM WHICH 8.5 TONS OF POCKET ORE YIELDED $7523.04 BT. 1911 AND 1914. ORE CARRIED ONLY 3 PERCENT SULFIDES; AVERAGE MILLING RAN $25 TO $30 PER TON WITH HIGH-GRADE RUNNING AS HIGH AS $643.00 PER TON.

Workings at the site

  • Type of workings Underground
    Overall depth 33.53M

Comments on the workings information

  • SHAFT IS NOW LARGELY FILLED W DEBRIS. VERTICAL SHAFT 65 - 110 FT. DEEP WITH 50 FT. DRIFT W. SHAFT WAS ORIG. WITH 185 FT. OF DRIFTS.

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. 236 .

  • 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. 28 - 29 .

  • Deposit

    CASTELLO, W. O., 1921 , MARIPOSA COUNTY: 17TH REPORT STATE (CALIF.) MINERALOGIST ( FOR 1920 ), P. 115 - 6 .

  • Production

    BOWEN AND GRAY, 1957

General comments

Subject category Comment text
Deposit VEINS, POCKETS
Deposit SHAFT IS NOW LARGELY FILLED WITH DEBRIS.

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.