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  3. Mineral Resource Data System (MRDS)

Alpine

Past Producer in El Dorado county in California, United States with commodity Gold
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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. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10006992
MRDS ID C007957
Record type Site
Current site name Alpine
Alternate or previous names Union Consolidated
Related records 10284777

Geographic coordinates

Geographic coordinates: -120.85936, 38.88628 (WGS84)
Elevation 732
Relative position 1 3/4 MI. SW OF GEORGETOWN, 1/4 MI. SE OF FORNIS

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Georgetown(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 012N 010E 15,16 California

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • MOST OF GOLD IS FREE AND FINELY DISSEMINATED, MINOR AMOUNTS OF SULFIDES PRESENT IN ORE, ABOUT .5 %

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

(1) -120.85936, 38.88628
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Number Of South-Dipping Veins Cross Vein And Dip 25 Deg. To S.

Ore body information

  • Strike NW
    Dip 60 NE
    Depth to top 0M

Controls for ore emplacement

  • Flat-Dipping Ore Shoots, About 100 Ft. Long At Fault Intersections With Vein

Comments on the geologic information

  • WHITE SUGARY QUARTZ

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years LATE 1860S, 1888 , 1902 , 1912 , 1933 - 1938

Comments on the workings information

  • DEVELOPED BY 400 FT. SHAFT WITH LEVELS AT 100 , 200 , 300 , 350 AND 400 FT. LEVELS WITH 430 FT. SUB LEVEL.

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. 405 - 406 , 484 AND PL. 10 .

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 258 .

General comments

Subject category Comment text
Deposit VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Mateik, R.; Albers, John P. 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.