1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Gopher-Boulder

Past Producer in El Dorado county in California, United States with commodity Gold
Map
XML
JSON
KML
B
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. 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 10006944
MRDS ID C007822
Record type Site
Current site name Gopher-Boulder
Related records 10236110

Geographic coordinates

Geographic coordinates: -120.83491, 38.80573 (WGS84)
Elevation 549
Relative position 1 MI. NW OF KELSEY, JUST SW OF GOPHER HILL

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Garden Valley(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011N 010E 11,14 California

Comments on the location information

  • UTM ACC. SW 1/4 SEC. 11 , N 1/2 SEC. 14

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • ORE AVERAGED $2.50 TO $6 PER TON AU WORKED FROM HANGING WALL SIDE OF GOPHER AND FOOTWALL OF BOULDER

Materials information

Materials Type of material
Gold Ore

Analytical data

Result ORE AVERAGED $2.50 TO $6. PER TON AU, UP TO $16 PER TON AU

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -120.83491, 38.80573
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault Transverse To Veins

Ore body information

  • Strike N 11 W
    Dip NE
    Thickness 30.48M
    Depth to top 0M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years ACTIVE 1858 - 1880'S

Comments on the production information

  • PROSPECTED 1931 AND 1934 - 1936

Workings at the site

  • Type of workings Surface/Underground
    Length 609.6M
    Overall width 12.19M

Comments on the workings information

  • DEVELOPED BY 260 FT. INCLINED SHAFT 35 DEG. WITH LEVELS AT 50 FT. INTERVALS, A 200 FT. DRIFT ADIT, 850 FT. CROSSCUT ADIT AND OPEN CUTS

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL. 52 , NO. 4 , PG. 505 AND PL. 10 .

  • Deposit

    LOGAN, C. A., 1935 , MOTHER LODE GOLD BELT OF CALIF.: CALIF. DIV. MINES BULL. 108 , PG. 24 - 25 AND PL. II.

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 262 AND PL. II.

  • Deposit

    TUCKER, W. B., 1919 , EL DORADO COUNTY: CALIF. MIN. BUR. REPT., 15TH REPT. STATE MIN., P. 87 .

  • Production

    CLARK ( 1956 )

General comments

Subject category Comment text
Deposit TWO VEINS, GOPHER STRIKES N 23 W, DIPS NE, BOULDER VEIN INFO. GIVEN. VEIN 30 - 100 FT. THICK, FLAT QUARTZ STRINGERS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Mateik, R.; Albers, John P. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan 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.