1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Mount Pleasant

Past Producer in El Dorado county in California, United States with commodities Gold, Lead, Zinc, Copper
Map
XML
JSON
KML
B
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. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Production statistics
  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 10007125
MRDS ID C008527
Record type Site
Current site name Mount Pleasant

Geographic coordinates

Geographic coordinates: -120.54129, 38.6374 (WGS84)
Elevation 1173
Relative position 3/4 MI. W OF GRIZZLY FLAT

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sly Park(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 009N 013E 10 California

Comments on the location information

  • UTM ACC. NW 1/4

Commodities

Commodity Importance
Gold Primary
Lead Tertiary
Zinc Critical Tertiary
Copper Tertiary

Comments on the commodity information

  • BEST PAY SAID TO BE WITHIN GRANODIORITE, COPPER IN LOWER LEVELS

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -120.54129, 38.6374
ListMap

Economic information

Ore body information

  • Depth to top 0M

Controls for ore emplacement

  • Veins In Contact Zone Btwn. Granodiorite On W And Mica Schist To E

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years ACTIVE 1874 - 1914 ; PRIOR TO 1874 NO RECORDS EXIST

Production statistics

  • Year 1887
    Period 1881 - 1887
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 2057300g
  • Year 1904
    Period 1897 - 1904
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 1371500g

Comments on the production information

  • ACTIVE 1851 - 1874 , 1874 - 1914 , PROSPECTED AFTER 1914 , 1939 - 41

Workings at the site

  • Type of workings Underground
    Length 3048M
    Overall depth 324.61M

Comments on the workings information

  • DEVELOPED BY 1,065 FT. SHAFT WITH LEVELS AT 100 FT. INTERVALS, MOST OF DEVELOPMENT WAS N OF THIS SHAFT AND MAINLY ABOVE 850 FT. DEPTH, MORE THAN 9000 FT. OF DRIFTS, OTHER SHAFTS 300 TO 600 FT. DEEP.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL. 52 , NO. 4 , PG. 421 , 520 AND PL. 10 .

  • Deposit

    LOGAN, C. A., 1926 , EL DORADO COUNTY: CALIF. MIN. BUR., 22ND REPT. STATE MIN., PG. 416 - 417 AND 431 .

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG. 241 - 242 , 265 AND PL. II.

  • Production

    CLARK, ( 1956 ), LOGAN, ( 1926 )

General comments

Subject category Comment text
Deposit BELT OF NEARLY PARALLEL VEINS IN CONTACT ZONE, 3 MAIN VEINS, STRIKE 2 - 10 E OF BELT STRIKE. MAIN VEIN FOR ORE IS EARLE VEIN ( 1 - 18 FT. THICK ), OTHERS ARE MT. PLEASANT ( 6 - 18 FT. ), MCKANE ( 1 - 14 FT. ) AND CHARLES ( 1/2 - 4 FT. )

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Mateik, R.; Albers, John P. U.S. Geological Survey CLEANED UP HOST ROCKS. DELETED HOST ROCK FROM IGNEOUS ROCK TYPE.
Updater 04-OCT-1991 Mosier, Dan U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan 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.