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  3. Mineral Resource Data System (MRDS)

Cosumnes Melton, Middle End

Producer in El Dorado county in California, United States with commodities Gold, Silver, Copper, 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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10030434
MRDS ID M008510
Record type Site
Current site name Cosumnes Melton, Middle End

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -120.54531, 38.66257 (WGS84)
Relative position Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.

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)

Federal lands

Eldorado National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

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 03,04 California

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Primary
Lead Primary

Nearby scientific data

Centroid (1) -120.54531, 38.66257
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Caldor Lumber Co.

Comments on the production information

  • ACTIVE DURING 1880'S AND IN 1894 AS THE MELTON MINE; REOPENED IN 1928 AS MIDDLE END MINE AND OPERATED ALMOST CONTINUOUSLY UNTIL 1942. OPERATED BY COSUMNES MINES INC. FROM 1945-1950 WHEN PURCHASED BY PRESENT OWNER. DURING LAST YEARS OF OPERATION ORE CONTAINED AS MUCH AS $25 PER TON IN GOLD AND SULFIDE CONCENTRATES YIELDED FROM $100 TO $200 PER TON IN GOLD.

Comments on the workings information

  • A 380-FT. CROSSCUT ADIT TO THE VEIN AND SEVERAL THOUSAND FEET OF DRIFTS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, PP.413, 494; V.53, NOS. 3 & 4, P.441; V.34, NO.3, P.265

General comments

Subject category Comment text
Deposit APPRECIABLE AMOUNTS OF GALENA AND PYRITE, WITH SPHALERITE, CHALCOPYRITE STIBNITE, AND ARSENOPYRITE ARE PRESENT IN THE ORE. ABOUT 10,000 LB. OF LEAD AND SOME COPPER PRODUCED 1928-1951, IN ADDITION TO GOLD-SILVER. WORKINGS SHOWN IN W1/2 NW1/4 SEC. 3 ON USGS QUAD. SLY PARK, CALIF. 1953

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-72 Gere, W. 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.