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Alto Mine

Producer in Calaveras 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. Ore body information
  11. Economic information about the deposit and operations
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10028786
MRDS ID M005983
Record type Site
Current site name Alto Mine
Alternate or previous names Alta Mine

Geographic coordinates

Geographic coordinates: -120.60711, 37.89491 (WGS84)
Elevation 183
Relative position IN SCORPION GULCH, 7 MI. SSE OF COPPEROPOLIS

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New Melones Dam(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 012E 36 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

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

Nearby scientific data

(1) -120.60711, 37.89491
ListMap

Economic information

Ore body information

  • Strike N 50 W
    Dip NE
    Width 22.86M
    Depth to top 0M

Comments on the geologic information

  • GEOL.DESC: TWO PRINCIPAL VEINS, SEVERAL HUNDRED FEET APART BUT CONVERGE TO THE NORTH. THE WEST VEIN IS A DIKE-LIKE BODY OF MINERALIZED GREENSTONE WHICH IS MASSIVE, FINE GRAINED, DARK AND IMPREGNATED WITH FINE-GRAINED PYRITE. RELATIVELY SMALL AMOUNT OF QUARTZ AND COMB STRUCTURES ARE COMMON.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1896 - 1907

Comments on the production information

  • VALUE OF TOTAL PRODUCTION ESTIMATED AT 1 MILLION DOLLARS AT OLD PRICE. GLORY HOLE MINING 1902 - 1907 . QUARTZ ORE UP TO $10/TON WITH SULFIDE CONCENTRATES $35 TO $40 PER TON OF AU. SOME HIGH GRADE ORE FOUND. 40 STAMP MILL, NO. 3 GATES GYRATORY CRUSHER, 8 CONCENTRATING TABLES. DURING THE PERIOD FROM 1902 TO 1907 THE ORE FROM THE QUARTZ VEINS AVERAGED $1.20 PER TON.

Workings at the site

  • Type of workings Surface/Underground
    Area 16.188HA
    Overall depth 137.16M
    Overall length 152.4M
    Overall width 76.2M

Comments on the workings information

  • MAIN GLORY HOLE ON WEST VEIN WITH SMALL ONE ON EAST VEIN. LEVELS IN MINE ARE AT 100 , 200 , 300 AND 400 FT. WITH 100 FT. LEVEL HAVING CROSSCUT TO GLORY HOLE. CONSIDERABLE STOPING DONE ON EAST VEIN

Reference information

Bibliographic references

  • Deposit

    CLARK, W.B., LYDON, P.A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIF.; COUNTY REPORT 2 ; CALIF. DIV. OF MINES AND GEOLOGY, P. 37 - 40 , 135 AND PL 3

  • Deposit

    TUCKER, W.B., 1915 , CALAVERAS COUNTY; 14 TH REPT. STATE MIN.; CALIF. MIN. BUR., P. 68

  • Production

    CLARK ( 1962 ), TUCKER ( 1915 )

General comments

Subject category Comment text
Deposit VEIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-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.

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.