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  3. Mineral Resource Data System (MRDS)

Roark Mine

Past Producer in Imperial county in California, United States with commodities Tungsten, Garnet
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10035295
MRDS ID M022594
Record type Site
Current site name Roark Mine
Alternate or previous names Graphite Claim
Related records 10187805

Geographic coordinates

Geographic coordinates: -115.96749, 32.66701 (WGS84)
Relative position 4.9 MILES S 17 E OF OCOTILLO.

Site location context

Political divisions (FIPS codes)

Imperial(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coyote Wells(quadrangle 1:24,000 scale)

El Centro(quadrangle 1:100,000 scale)

El Centro(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salton Sea(hydrologic accounting unit)

Southern Mojave-Salton Sea(hydrologic subregion)

California(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States California Imperial

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 017S 010E 16 SW OF SW California

Comments on the location information

  • IN THE JACUMBA WILDERNESS.

Commodities

Commodity Importance
Tungsten Critical Primary
Garnet Secondary

Materials information

Materials Type of material
Garnet Ore
Scheelite Ore
Quartz Gangue

Analytical data

Result CHIP SAMPLE CONTAINS 0.07% WO3, GRAB SAMPLE CONTAINS 0.29% WO3.

Mineral occurrence model information

Model code 42
USGS model code 14a
Deposit model name W skarn

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -115.96749, 32.66701
ListMap

Economic information

Ore body information

  • General form LENS
    Strike N 60 W
    Dip 55 SW
    Thickness 7.62M

Comments on the geologic information

  • FOOTWALL IS A 5-10 FT WIDE DIKE OF ACIDIC COMPOSITION, HANGING WALL IS SCHIST. LIMESTONE LENS IS AT LEAST 25 FT THICK, STRIKES N60W, DIPS 55SW. ; GEOL.DESC: FOOTWALL IS A 5 - 10 FT. WIDE DIKE OF ACIDIC COMPOSITION, HANGING WALL IS SCHIST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Significant No

Workings at the site

  • Type of workings Underground
    Length 33.53M
    Overall depth 9.14M

Comments on the workings information

  • EXPLORED BY 30 FT. VERTICAL SHAFT, 80 FT. OF HORIZONTAL WORKING AT 30 FT. LEVEL, 2 PITS SE OF SHAFT.

Reference information

Bibliographic references

  • Deposit

    MORTON, P. K., 1977, GEOLOGY AND MINERAL RESOURCES IMPERIAL COUNTY; COUNTY REPT. 7, DIV. OF MINES. P. 96.

  • Deposit

    TODD, V.R., KILBURN, J.E., DETRA, D.E., GRISCOM, ANDREW, KRUSE, F.A., AND MCHUGH, E.L., 1987, MINERAL RESOURCES OF THE JACUMBA (IN-KO-PAH) WILDERNESS STUDY AREA, IMPERIAL COUNTY, CALIFORNIA: U.S. GEOLOGICAL SURVEY BULL. 1711-D, 15 P.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit WEAKLY SILICATED ZONE, LATERAL EXTENT OF ZONE NOT DETERMINED: MINERALIZATION IS OCCURRS INTERMITTENT. DISSEMINATED SCHEELITE OCCURS IN SILICATED ZONE OF LIMESTONE LENS AND IN QUARTZ-GARNET SKARN ZONE 600 FT SE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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.