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Penn

Past Producer in Calaveras county in California, United States with commodities Copper, Zinc, Silver, Gold, 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. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Production statistics
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10033797
MRDS ID M020443
Record type Site
Current site name Penn
Alternate or previous names Campo Seco, Copper Hill, Hecla, Hinckley, Penn Chemical Works, Satellite

Geographic coordinates

Geographic coordinates: -120.87491, 38.23019 (WGS84)
Elevation 99

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Valley Springs(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

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 004N;005N 010E;010E 03,04;33 California

Commodities

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

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Copper Ore
Covellite Ore
Galena Ore
Gold Ore
Malachite Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Barite Gangue
Calcite Gangue
Chlorite Gangue
Quartz Gangue
Selenite Gangue
Sericite Gangue

Alteration

  • (Local) Zones Of Sericitization, Silicification And Pyritization As Belts And Lenses In Metavolcanic And Intrusive Rocks.

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Amador Group
    Rock description Amador Group

Nearby scientific data

(1) -120.87491, 38.23019
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Faults; 3 Categories 1. Generally Steeply Dipping Faults, Strike Ne, Little Effect On Ore Body 2. Low-Angle Reverse Faults, N 30 W - N 30 E, 25 - 55 E 3. High-Angle, Along Certain Schistosity Planes Or At Contacts. Folds Plunge From 60 S - 85 N, Schistosity And Cleavage In Most Rocks - Schistosity Parallel To Bedding Dips Eastward 5 - 15 Degrees.

Ore body information

  • General form LENTICULAR
    Thickness 9.14M

Controls for ore emplacement

  • 1. Belts Of Sericitization And Silification, 2. Areas Of Bowing And Buckling Normal To Schistosity, 3. Intersections Of High-Angle Schistosity Faults With Low Angle Reverse Faults, 4. Small Tight And Unsystematically Oriented Schistosity Folds.

Comments on the geologic information

  • GEOL.DESC: METAMORPHIC ROCKS CONSISTS OF THICK SEQUENCE OF METAVOLCANIC AND METASEDIMENTARY ROCKS WHICH ARE INTRUDED BY VARIOUS INTRUSIVE ROCKS. UNDERNEATH MINE AREA IS MARIPOSA SLATE AND VOLCANIC ROCKS ASSIGNED TO AMADOR GROUP. BEDDING AND LAYERING DIP STEEPLY NE AND STRIKE NW. IN GENERAL SCHISTOSITY AND CLEVAGE ARE PARALLEL TO BEDDING. HIGHER HILLS; TERTIARY AURIFEROUS GRAVEL RESTS ON UNCONFORMITY WHICH DIPS GENTLY WESTWARD. ANOTHER GRAVEL, GENERALLY AURIFEROUS, INTERBEDDED WITH VOLCANIC ASH LIE ON BENCHES DEVELOPED ON UNWEATHERED ROCKS, LESS THAN 100 FT. ABOVE PRESENT RIVER LEVEL.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1861
Year of first production 1861
Year of last production 1959
Production years 1861-1867, 1883-1896, 1899-1919, 1926, 1928, 1937, 1943-1946, 1948-1953, 1955-1956, 1958-1959

Production statistics

  • Year 1952
    Period 1920-1952
    Material Ore
    Ore mined 193.3mt
    Accuracy Accurate
    Description Cp_Grade: ^196.413 Tons Ore
  • Year 1952
    Period 1943-1952
    Material Ore
    Ore mined 190275.38mt
    Accuracy Accurate
    Description Cp_Grade: ^193,330 Tons Ore
  • Year 1952
    Period 1861-1952
    Material Ore
    Ore mined 958398.21mt
    Accuracy Accurate
    Description Cp_Grade: ^973,784 Tons Ore

Comments on the production information

  • AVG. GRADE ORE 1903 - 1919 ; CU 4.85 %, AU .07 OZ/TON, AG 2.32 OZ/TON. AVG. GRADE ORE 1943 - 46 ; CU 2.05 %, PB 5.58 %, ZN 7.89 %, AU .07 OZ/TON, AG 2.37 OZ/TON 1868 - 1882 MINE WAS BELIEVED TO BE INACTIVE.

Workings at the site

  • Type of workings Surface/Underground
    Length 16764M
    Overall depth 1036.32M

Comments on the workings information

  • DEVELOPED BY AT LEAST 20 SHAFTS, SIX ARE NUMBERED, 42,000 FT. IN DRIFTS AND CROSSCUTS, OVER 13,000 FT. IN SHAFTS AND RAISES.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND LYDON, P. A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA; COUNTY REPT. 2 ; CALIF. DIV. MINES AND GEOLOGY, P. 28 - 31

  • Deposit

    HEYL, G. R., COX, M. W. AND ERIC, J. H., 1948 , PENN ZINC-COPPER MINE, CALAVERAS COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 61 - 84

  • Production

    CLARK, W. B. & LYDON, P. A., 1962 , (SEE REF.)

General comments

Subject category Comment text
Deposit GOSSAN FOUND ALONG OUTCROPS OF ORE BODIES CONTAIN; MALACITE, AZURITE, JAROSITE, LIMONITE AND KAOLIN. ORE BODIES LONG AXES PLUNGE STEEPLY NORTHWARD OR SOUTHWARD.

Reporter information

Type Date Name Affiliation Comment
Reporter 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.