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Pyramid

Past Producer in El Dorado county in California, United States with commodities Gold, Lead, Copper
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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. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10006834
MRDS ID C007403
Record type Site
Current site name Pyramid
Alternate or previous names Gold Reserve

Geographic coordinates

Geographic coordinates: -120.94185, 38.72601 (WGS84)
Relative position 4 1/4 MI. N OF SHINGLE SPRINGS

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Shingle Springs(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)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 009E 12,13 California

Comments on the location information

  • UTM ACC. NW 1/4

Commodities

Commodity Importance
Gold Primary
Lead Tertiary
Copper Tertiary

Comments on the commodity information

  • AU PARTLY IN SULFIDES, PARTLY FREE

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Ankerite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -120.94185, 38.72601
ListMap

Economic information

Ore body information

  • Strike NW
    Dip 50 E
    Thickness 6.1M
    Depth to top 0M

Comments on the geologic information

  • MAIN QTZ. VEIN FROM A FEW IN. TO 20 FT. THICK IN W GOLD BELT. AMPHIBOLITE SCHIST COUNTRY ROCK LIES BETWEEN GABBRO-DIORITE TO W AND SERPENTINE TO E. DIPS 40 - 60 E. ORE SHOOT 500 FT. WIDE. QTZ. MASS ORIGINALLY OUT CROPPED 25 FT. IN AIR, WHERE SEVERAL VEINS UNITED.

Economic information about the deposit and operations

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

Comments on the production information

  • NOT OPERATED BETWEEN 1890S AND 1933 . SUBSEQUENTLY, SEVERAL CONCERNS DID TOTAL PRODUCTION GIVEN FROM PERSONAL COMMUNICATION.

Comments on the workings information

  • 2 DRIFT ADITS, 500 FT. EA. 50 FT. SHAFT DEVELOPED BY 818 FT. INCLINED SHAFT.

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. 423 .

  • Deposit

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

  • Deposit

    CRAWFORD, J. J., 1892 , EL DORADO COUNTY: CALIF. MIN. BUR. 12TH REPT. STATE MINERALOGIST, P. 121 .

  • Production

    CLARK AND CARLSON, 1956

General comments

Subject category Comment text
Deposit VEIN
Deposit GERE, CONSV M007403 , NOTES SIMILAR CLAIM 1/2 MI. E PINE HILL ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Hayden, F. (Albers, J.) 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.

External references

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.