Banner and Central

The Banner and Central is a gold mine located in Nevada 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

Name: Banner and Central  

State:  California

County:  Nevada

Elevation:

Primary Mineral: Gold

Lat, Long: 39.2275, -120.96917

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Satelite image of the Banner and Central

Banner and Central MRDS details

Site Name

Primary: Banner and Central
Secondary: Lava Cap


Commodity

Primary: Gold
Secondary: Copper
Secondary: Silver
Secondary: Lead
Tertiary: Tungsten


Location

State: California
County: Nevada


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Not available


Production

Year: 1943
Time Period: 1934 - 1943
Material type: AU
Description: Cp_Grade: ^50000 Tons Con. W/ 236000 Lbs Cu And 258,000 Lbs Pb


Deposit

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


Physiography

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


Mineral Deposit Model

Not available


Orebody

Form: LENSES, STRINGERS


Structure

Type: L
Description: Two Main Ore Zones; 1 Under Lava Capping Of Banner 100 Ft. Depth Other Part Of Central Mine.


Alterations

Not available


Rocks

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Pennsylvanian


Analytical Data

Not available


Materials

Ore: Gold
Gangue: Quartz


Comments

Comment (Workings): DRIFTS, CROSSCUTS, DRILL HOLES, RAISES, STOPES. BOTH CENTRAL AND BANNER 51 DEGREES INCLINED SHAFTS. FOR ADDITIONAL DATA ON WORKINGS, SEE CHANDLER, P. 413 - 419 .

Comment (Production): ASSAYS $20 - $30 AU/TON

Comment (Deposit): REVERSE FAULT FISSURES W/QUARTZ FITTING - VEINS INTERSECT AT POINT 2500 N. OF CENTRAL SHAFT. BANNER VEIN AVG. 7 FT. THICK. CENTRAL VEIN AVG. 3 FT. THICK. VEINS SPLIT W/ BARREN ZONES OF COUNTRY ROCK. THESE STRINGERS RARELY ECONOMICAL.

Comment (Geology): AGRILLITE, BELONGING TO CALAVERAS FM., BECOMES SILICEOUS TOWARD GRANODIORITE CONTACT ON NORTH SOUTHERN PART OF MINE CUT BY 'LATITE' DIKES, WHICH ARE CUT BY ORE FRACTURES. IN THE BANNER DIORITE AND ANDESITE DIKES PRESENT, ALSO OLDER THAN VEIN STRUCTURE. BOTH TYPES OF DIKES HAVE NO OBSERVABLE BEARING ON ORE SHOOTS. VEINS HIGHLY FRACTURED FROM FAULTING.

Comment (Deposit): PATENTED BANNER AND CENTRAL PART OF LAVA CAP. GOLD MUG. CO. ; INFO.SRC : 1 PUB LIT


References

Reference (Deposit): CHANDLER, J. W., 1941 , MINING METHODS AND COSTS OF THE LAVA CAP GOLD MINING CORPORATION, NEVADA CITY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , P. 409 - 412 .

Reference (Deposit): LOGAN, C. A., 1934 , REVIEW OF GOLD MINING IN EAST - CENTRAL CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 31 , NO. 1 , P. 16 - 17 .

Reference (Deposit): ERIC, J. C., 1948 , TABULATION OF COPPER DEPOSITS IN CALIFORNIA IN COPPER IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 144 , P. 278 .

Reference (Deposit): GOODWIN, J. G., 1957 , LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 57 , NOS 3 AND 4 , P. 580 .

Reference (Production): ERIC ( 1948 ) GOODWIN ( 1957 )