B and M

The B and M is a gold mine located in Mariposa county, California.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: B and M
Secondary: Fournier

Commodity

Primary: Gold
Secondary: Silver

Location

State: California
County: Mariposa

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Analytical Data: ONLY 3 % SULFIDE ORE

Materials

Ore: Silver
Ore: Gold
Gangue: Quartz

Comments

Comment (Production): 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.

Comment (Deposit): VEINS, POCKETS

Comment (Location): NEAR BUCKEYE CREEK UTM EST.

Comment (Deposit): SHAFT IS NOW LARGELY FILLED WITH DEBRIS.

Comment (Workings): 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.

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

References

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

Reference (Production): BOWEN AND GRAY, 1957

Reference (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 .

Reference (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 .

California Gold

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.