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Quail Hill

Past Producer in Calaveras 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. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10102614
MRDS ID M005704
Record type Site
Current site name Quail Hill
Alternate or previous names Eagle
Related records 10162975

Geographic coordinates

Geographic coordinates: -120.75018, 37.96102 (WGS84)
Relative position 6 1/2 MILES SW. OF COPPEROPOLIS

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bachelor Valley(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower San Joaquin River(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 011E 03,10 California

Commodities

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

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Sphalerite Ore
Barite Gangue
Calcite Gangue
Chlorite Gangue
Quartz Gangue

Alteration

  • (Local) Sericitization, Kaolinization, Silicification, And Pyritization.

Analytical data

Result LARGEST ORE SHOOT
Result 5.58 % CU, 15.6 % ZN, .40 OZ/TON AU, 6.51 OZ/TON AG, AND 0.5 - 1.8 % PB.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock

Nearby scientific data

(1) -120.75018, 37.96102
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Folds, Faults

Ore body information

  • General form POD/LENS
    Strike NW
    Dip 50 - 70 NE
    Depth to top 30.48M

Comments on the geologic information

  • GEOL.DESC: LOWER FOOTHILLS SIERRA NEVADA; THICK SEQUENCE OF LAVAS AND PYROCLASTICS AND VARIETY OF INTRUSIVE ROCKS. BOTH TYPES OF IGNEOUS ROCKS ARE IN PART METAMORPHOSED TO LOW GRADE SCHISTS AND GREENSTONES. VOLCANICS USUALLY DIP STEEPLY NE AND A FAIRLY CONSTANT NW STRIKE. SCHISTOSITY WHERE DEVELOPED IS GENERALLY PARALLEL TO NW STRIKE AND NE DIP. LARGEST INTRUSIVE IS AN IRREGULAR SHAPED FELSITE BODY, 1,900 FT. LONG AND 1,500 FT. WIDE. DIKES OF GREENISH - GRAY DIABASE AND DIABASE PORPHYRY CUT THE FELSITE INTRUSIVE AND VOLCANIC ROCKS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Production years 1888 - 1916 , 1917 - 1945

Comments on the production information

  • 1888 - 1916 , 1921 - 1937 AND 1939 - 1942 ; NO PRODUCTION REPORTED

Comments on the reserve resource information

  • MOST FAVORABLE GROUND IS THAT LYING ALONG TREND OF DOWNWARD EXTENSION OF STRONGLY MINERALIZED ZONE.

Workings at the site

  • Type of workings Underground
    Overall depth 85.34M

Comments on the workings information

  • A TWO - COMPARTMENT VERTICAL SHAFT 280 FT. DEEP, LEVELS AT 70 , 170 , 205 AND 270 FT. SUBLEVELS AT 190 AND 296 FT. ONE ADIT, MINING CARRIED ON IN OPEN STOPES. MANY PORTIONS OF MINE INACCESSIBLE DUE TO CAVING.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B. AND LYDON, P. A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA; COUNTY REPORT 2 ; CALIF. DIV. MINES AND GEOLOGY, P. 31 - 32 .

  • Deposit

    HEYL, G. R., 1948 , ZINC - COPPER MINES OF THE QUAIL HILL AREA, CALAVERAS COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 112 - 122 .

  • Production

    HEYL, G. R., 1948 , P. 114 (SEE REF.)

General comments

Subject category Comment text
Deposit LARGEST ORE SHOOT; BEST EXPOSED ON 205 FT. LEVEL, IT WIDENS DOWNWARD BELOW 170 FT. LEVEL, PINCHING OUT AT 240 FT., THIS ORE SHOOT PARALLELS ADJACENT HANGING WALL OF FELSITE INTRUSIVE, IT DIPS TOWARD EAST, PLUNGE 68 SE, PITCH LENGTH 177 FT. SMALLER ORE SHOOTS; SIMILAR IN MODE OF OCCURANCE, SPATIALLY RELATED TO SALIENTS IN HANGING WALL OF FELSITE INTRUSIVE, OR TO FAULTS OR BOTH. THESE SHOOTS REPLACED INTRUSIVE FELSITE IN SHEAR ZONES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 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.

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.