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American Eagle

Past Producer in Mariposa county in California, United States with commodities Copper, Zinc, Gold, Silver, Lead
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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. Ownership information
  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 10030918
MRDS ID M009407
Record type Site
Current site name American Eagle
Alternate or previous names Bullion Hill, Blue Bell, And Bonanza
Related records 10115214

Geographic coordinates

Geographic coordinates: -120.25516, 37.55936 (WGS84)
Relative position 3 MILES NW OF HORNITOS

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Merced Falls(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 016E 30 California

Comments on the location information

  • UTM ACC; LATITUDE-LONGITUDE VALUES CALCULATED FROM TOWNSHIP, RANGE, SECTION.

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Gold Secondary
Silver Secondary
Lead Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Barite Gangue
Calcite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Hydrothermal, Sericitization

Analytical data

Result OBTAINED FROM (ZONE A), CU 1.53 - 11.01 %, ZN 2.59 - 8.29 %, PB .71 - 1.02 %, AU .01 - .22 OZ/TON, AG .99 - 2.58 OZ/TON.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.25516, 37.55936
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Schistosity Trends North, Rocks Extremely Fissile, Crinkled And Folded; Crinkles In Schistosity Plung 50 - 70 North Or South, Suggest Zone Of Shearing.

Ore body information

  • General form TABULAR
    Thickness 1.22M

Comments on the geologic information

  • GEOL.DESC: ORE BODIES ARE ELONGATED PARALLEL TO SCHISTOSITY OF ENCLOSING SCHIST. ZONE A IS LOCATED IN SHEARED FELSITE BRECCIA OR TUFF NEAR CONTACT WITH MASSIVE FELSITE VOLCANIC ROCK. META VOLCANICS ARE CUT BY GREENSTONE DIKES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1890

Ownership information

  • Type Operator
    Owner Jack I. And Irene Kopp Et Al.

Comments on the production information

  • NO PRODUCTION REPORTED

Workings at the site

  • Type of workings Surface/Underground
    Area 24.282HA
    Overall depth 91.44M

Comments on the workings information

  • 50 SHALLOW PITS, TRENCHES AND SHAFTS, ADIT CONSISTS OF 750 FT. OF HORIZONTAL WORKINGS, 2 WINZES; ONE 40 FT., THE OTHER FILLED. ONE 25 FT. HIGH STOPE. 7 DRILL HOLES BY BUREAU OF MINES TOTALLING 2,800 FT.

Reference information

Bibliographic references

  • Deposit

    BOWEN, O. E. AND CLIFFTON, G. H., 1957 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY, CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NO. 1 & 2 , P. 199 - 200 .

  • Deposit

    ERIC, J. H., AND COX, M. W., 1948 , ZINC DEPOSITS OF THE AMERICAN EAGLE - BLUE MOON AREA, MARIPOSA COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 142 - 144 .

General comments

Subject category Comment text
Deposit 6 OVERLAPPING, EN ECHELON MINERALIZED ZONES, STRUNG OUT IN NW DIRECTION, OVER LENGTH OF 1000 FT. ONLY ONE (ZONE A) THE MOST WESTERLY, IS MOST PROMISING OF BEARING ORE OF ECONOMIC GRADE AND QUANITY.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-JUN-1978 Fraticelli, L. A. (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.