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Stirnaman

Producer in Amador county in California, United States with commodity Manganese
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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. Economic information about the deposit and operations
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10109109
MRDS ID M005227
Record type Site
Current site name Stirnaman
Related records 10138401

Geographic coordinates

Geographic coordinates: -120.60101, 38.44323 (WGS84)
Relative position LOCATED BETWEEN PINE GROVE AND PIONEER STATION

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

West Point(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Mokelumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 007N 012E 24 California

Comments on the location information

  • LOCATED IN SE 1/4 SECTION 24

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Psilomelane Ore
Rhodonite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock
    Rock unit name Calaveras Complex
    Rock description Calaveras Complex
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) -120.60101, 38.44323
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faulting And Folding Anticlinal Structure Plunges Northeast.

Ore body information

  • Strike N 20 - 40 E
    Dip 55 - 65 SE
    Width 2.44M

Comments on the geologic information

  • HOSTED IN CALAVERAS SERIES - L. ; GEOL.DESC: LENSES OF BOTRYOIDAL AND NODULAR PSILOMALENE 1 TO 8 FT. WIDTH IN MASSIVE META-CHERT. MASSIVE METACHERT (RECRYSTALLIZED TO FINE GRAINED QUARTZITE) ENCLOSED IN RHYTHMICALLY BEDDED WHITE METACHERT; FORMING BELT 30 TO 50 FT. WIDE OF META-CHERT SURROUNDED BY QUARTZ SERICITE SCHIST. STRUCTURE LOCALLY COMPLEX. EXPOSURES OF RHODONITE AT DEPTH.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Ownership information

  • Type Owner
    Owner J. L. And L. C. Wells
    First year 1953

Comments on the production information

  • DURING WWI 250 TONS OF MANGANESE ORE SHIPPED. LEASED BY DR. J. T. STACY 1942-43 AND SOME ORE SHIPPED. IDLE SINCE 1943. ONE SHIPMENT IN 1942 RAN 52 PERCENT MANGANESE, 3 PERCENT IRON, AND 4.5 PERCENT SILICA

Comments on the workings information

  • SMALL AND LARGE OPEN CUTS, TWO MAIN LEVELS OF STOPES, SURFACE BULLDOZING

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 39, NO. 1, JAN. 1943, P. 71; V. 50, NO. 1, JAN. 1954, P. 202-3, 269

  • Deposit

    USBM RI 5579, P. 21-22

  • Deposit

    D.O.M. BULL. 152 1950 PP. 34 - 35

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-APR-1977 Von Dohlen, E.; 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.