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Eagle - Shawmut

Past Producer in Tuolumne 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10077877
MRDS ID W025943
Record type Site
Current site name Eagle - Shawmut
Related records 10263347

Geographic coordinates

Geographic coordinates: -120.39656, 37.86714 (WGS84)
Elevation 381
Relative position ON WOOD CREEK, 2 MILES NW OF JACKSONVILLE

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chinese Camp(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001S 015E 11 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Ankerite Gangue
Quartz Gangue

Alteration

  • (Local) Pyroxenite Intrusive Has Been Sheared And Altered To Multiform Chlorite Schist And Subsequently Ankerized And Silicified. Chlorite Schist Sometimes Resembles Serpentine Schist Due To The Lusterous Green; In Places This Rock Has A Pseudomorphic Texture Much Like Serpentinized Peridotite But The Phenocrysts Instead Of Being Bastite Are Chlorite Embedded In A Fine-Grained Chlorite Matrix.

Analytical data

Result SULFIDE ORE AS MUCH AS 15 PERCENT OF TOTAL ORE.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Economic information

Geologic structures

Type of structure Local
Structure description See Comments

Ore body information

  • Depth to top 0M

Comments on the geologic information

  • GEOL.DESC: SLATE INTERBEDDED WITH THIN LAYERED SANDSTONE AVERAGING 2 INCHES; LENSES OF LIMESTONE 2 TO 3 FT. THICK OCCUR ABOVE VOLCANIC ROCKS AND THINNER LENSES OF CONGLOMERATE OCCUR IN SLATE BELOW THE VOLCANICS. BETWEEN GREEN-CHLORITE SCHIST AND BLACK SLATE A NARROW BELT OF PYROXENITE OR HORNBLENDITE OR AN ALLIED HORNBLENDE-PYROXENE PERIDOTITE EXISTS. FOR A MORE COMPLETE GEOLOGIC DESCRIPTION SEE ADOLF, A., 1929

Economic information about the deposit and operations

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

Mining district

District name Mother Lode Belt

Workings at the site

  • Type of workings Underground
    Area 307.572HA
    Overall depth 914.4M

Comments on the workings information

  • CROSSCUT ADIT 1,100 FT. THROUGH FOOTWALL TO LODE AND CONNECTING WITH INCLINED SHAFT 2,163 FT., 19 LEVELS AT VARIOUS INTERVALS

Reference information

Bibliographic references

  • Deposit

    KNOPF, A., 1929 , THE MOTHER LODE SYSTEM OF CAL.: U.S.G.S. PROF. PAPER 157 , P. 79

  • Deposit

    TUCKER, W.B., 1914 , TUOLUMNE COUNTY: CMB REPT. 14 , P. 146

General comments

Subject category Comment text
Deposit NOT MUCH WORK DONE BEFORE 1896 WHEN EAGLE AND SHAWMUT CLAIMS WERE JOINED TOGETHER. REFERENCES INCLUDE REPORT ON EACH MINE SEPARATELY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Albers, J.; Tatkin, T. 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.