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Banner and Central

Past Producer in Nevada county in California, United States with commodities Gold, Copper, Silver, Lead, 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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10101288
MRDS ID C011506
Record type Site
Current site name Banner and Central
Alternate or previous names Lava Cap
Related records 10164660

Geographic coordinates

Geographic coordinates: -120.9702, 39.22739 (WGS84)
Relative position E SLOPE BANNER MT., 2 MI. N BEAR RIVER SCHOOL

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chicago Park(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Nevada

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 016N 009E 16,28,21 California

Commodities

Commodity Importance
Gold Primary
Copper Secondary
Silver Secondary
Lead Secondary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
    Rock unit name Calaveras Complex
    Rock description Calaveras Complex

Nearby scientific data

(1) -120.9702, 39.22739
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Two Main Ore Zones; 1 Under Lava Capping Of Banner 100 Ft. Depth Other Part Of Central Mine.

Ore body information

  • General form LENSES, STRINGERS
    Strike N-N 25 W
    Dip 50 E - 51 NE
    Thickness 7.62M
    Depth to top 0M

Controls for ore emplacement

  • Faulting Prior And After Deposition Of Quartz Filling

Comments on the geologic information

  • 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.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No

Production statistics

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

Comments on the production information

  • ASSAYS $20 - $30 AU/TON

Workings at the site

  • Type of workings Underground
    Length 792.48M
    Overall depth 304.8M

Comments on the workings information

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

Reference information

Bibliographic references

  • 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 .

  • 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 .

  • Deposit

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

  • Deposit

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

  • Production

    ERIC ( 1948 ) GOODWIN ( 1957 )

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Bowman, J. And 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.