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Colombo-Bullion Group

Past Producer in Sierra county in California, United States with commodities Gold, Lead
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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. Economic information about the deposit and operations
  12. Land status
  13. Production statistics
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10086595
MRDS ID X025580
Record type Site
Current site name Colombo-Bullion Group
Alternate or previous names Columbo
Related records 10140631

Geographic coordinates

Geographic coordinates: -120.67631, 39.57877 (WGS84)
Elevation 1524
Relative position 2 MI. NW OF SIERRA CITY

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sierra City(quadrangle 1:24,000 scale)

Portola(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 020N;020N 012E;011E 19,30;24 California

Comments on the location information

  • UTM ACC. SW 1/4 09 STEEP W BANK OF N FORK YUBA RIVER.

Commodities

Commodity Importance
Gold Primary
Lead Tertiary

Comments on the commodity information

  • MIDDLE ADIT VEIN ORE $12/TON

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Quartz Gangue

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
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.67631, 39.57877
ListMap

Economic information

Ore body information

  • Strike NW
    Dip 70 NE

Comments on the geologic information

  • 3 1/2 - 12 FT. THICK BULLION VEIN, SLATE FOOTWALL, DIORITE HANGING WALL, RED OXIDE OF IRON FULL OF QTZ. STRINGES, GOUGE ON BOTH SIDES. 3 PAY SHOOTS. CALIF. VEIN 6 FT. THICK STRIKES E, DIPS 50 N.

Economic information about the deposit and operations

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

Land status

Ownership category National Forest

Production statistics

  • Year 1939
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^1 Oz/Ton Au, .01 Oz/Ton Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Silver Silver 0g/mt
    Major Ore Gold Gold 28g/mt

Comments on the production information

  • TOTAL OUTPUT TO 1917 WAS $365,000. IN 1939 1200 TONS OF CONCENTRATE YIELDED 1147 OZ. AU & 40 OZ. AG

Workings at the site

  • Type of workings Unknown
    Area 60.705HA
    Overall length 2286M
    Overall width 1097.28M

Comments on the workings information

  • 3 ADITS. 1ST 1070 FT. NW ON VEIN. 2ND 180 FT BELOW 1ST. 3RD 130 FT. BELOW.

Reference information

Bibliographic references

  • Deposit

    MCCULLOCH, W. C., OESTERLING, W. A., SPURCK, W. H., & TISCHLER, M. S., 1964 , MINERALS FOR INDUSTRY, N CALIF.: SO. PACIFIC COMPANY, VOL. 2 , P. 53 .

  • Deposit

    AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL., VOL. 38 , NO. 1 , P. 22 , 23 , 53 .

  • Deposit

    LOGAN, C. A., 1929 , SIERRA CO.: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P. 162 , 174 .

  • Production

    MCCULLOCH ETAL, 1964

General comments

Subject category Comment text
Deposit VEINS, ORE SHOOT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 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.