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  3. Mineral Resource Data System (MRDS)

Francho Copper

Occurrence in Imperial county in California, United States with commodity Copper
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10034269
MRDS ID M021013
Record type Site
Current site name Francho Copper
Related records 10139360

Geographic coordinates

Geographic coordinates: -114.81524, 33.05368 (WGS84)
Relative position 25 MILES NW OF WINTERHAVEN, 2.5 MILES SSE OF QUARTZ PEAK.

Site location context

Political divisions (FIPS codes)

Imperial(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Quartz Peak(quadrangle 1:24,000 scale)

Trigo Mountains(quadrangle 1:100,000 scale)

Salton Sea(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Imperial Reservoir(hydrologic unit)

Lower Colorado(hydrologic accounting unit)

Lower Colorado(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Imperial

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 013S 020E 02,11,12,13 California

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chrysocolla Ore
Malachite Ore
Quartz Gangue
Tourmaline Gangue

Analytical data

Result FOUR SAMPLES AVERAGE 2.4% CU FOR MINERALIZED ZONE.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Host
    Rock type Metamorphic Rock > Phyllite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -114.81524, 33.05368
ListMap

Economic information

Ore body information

  • General form IRREGULAR
    Length 60.96M
    Width 3.05M

Comments on the geologic information

  • ONE QUARTZ VEIN CONTAINS FINE-GRAINED BLACK TOURMALINE. ; GEOL.DESC: NARROW DIKES OF ACIDIC TO INTERMEDIATE COMPOSITION WHICH INTRUDE A METAMORPHIC UNIT COMPOSED OF META-ANDESITE, PHYLLITE, AND META-CONGLOMERATE, METAMORPHIC UNIT IS THINLY OVERLAIN BY A GENTLY TILTED PLIOCENE (?) BASALT FLOW.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Workings at the site

  • Type of workings Surface
    Overall depth 3M
    Overall length 200M
    Overall width 10M

Comments on the workings information

  • 15 DEGREE INCLINED CUT 200 FT LONG BY 10 FT WIDE BY 3 FT DEEP: A PIT 100 FT IN DIAMETER HAS MAXIMUM DEPTH OF 10 FT, SEVERAL SMALLER CUTS.

Reference information

Bibliographic references

  • Deposit

    MORTON, P.K., 1977, GEOLOGY AND MINERAL RESOURCES OF IMPERIAL COUNTY, CALIFORNIA, COUNTY REPORT 7: CALIFORNIA DIVISION OF MINES AND GEOLOGY, P. 37

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit 10 FT MINERALIZED ZONE IN SEC. 12 , ANOTHER VEIN 500 FT WEST OF BULLDOZER CUTS IS CONTAINED IN AN 8 FT SHEAR ZONE WHICH APPEARS TO TREND N25W, DIPS STEEPLY NE, HOST ROCK THERE IS A GRAY PHYLLITE. THERE IS EVIDENCE OF OTHER VEINS BENEATH BASALT DEBRIS THROUGH FLOAT MATERIAL. ZONE CONSISTS OF IRREGULAR VEINS OF QUARTZ AND COPPER OXIDES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Fraticelli, L. A. (Albers, J.) U.S. Geological Survey
Updater 01-JUN-1993 Gray, Floyd 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.