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Mountain Spring

Past Producer in Imperial county in California, United States with commodities Limestone, General, Tungsten
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  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 10023473
MRDS ID I000459
Record type Site
Current site name Mountain Spring

Geographic coordinates

Geographic coordinates: -116.0625, 32.69701 (WGS84)
Location accuracy 10000(meters)
Relative position 9 MI NE OF JACUMBA.

Site location context

Political divisions (FIPS codes)

Imperial(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

In-Ko-Pah Gorge(quadrangle 1:24,000 scale)

El Cajon(quadrangle 1:100,000 scale)

San Diego(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salton Sea(hydrologic accounting unit)

Southern Mojave-Salton Sea(hydrologic subregion)

California(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

Comments on the location information

  • IN IN-KO-PAH GORGE, IMMEDIATELY ADJACENT TO THE JACUMBA (IN-KO-PAH) WILDERNESS STUDY AREA. LOCATED ON MAIN HIGHWAY FROM JACUMBA TO EL CENTRO.

Commodities

Commodity Importance
Limestone, General Primary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Limestone Ore
Graphite Gangue

Analytical data

Result SAMPLES OF THE LIMESTONE AVERAGED 0.6% AL2O3, 51.8% CAO, 0.14% FE2O3, 1.6% MGO, <0.03% P2O5, AND 9.6% SIO2. ONE OF TWO SAMPLES FROM THE SKARN ZONES CONTAINED 0.08% WO3.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Tonalite
    Rock unit name Tonalite Of La Posta
    Rock description Tonalite Of La Posta
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock

Nearby scientific data

(1) -116.0625, 32.69701
ListMap

Economic information

Ore body information

  • General form LENS
    Strike N65W
    Dip 45SW
    Thickness 9.14M
    Length 487.68M

Comments on the geologic information

  • IRREGULAR PODS OF GARNET-EPIDOTE-QUARTZ SKARN OCCUR ALONG THE MARGINS OF THE LIMESTONE LENS. THE SKARN PODS ARE UP TO 5 FT THICK AND 15 FT LONG. THE TABLULAR BODY OF METASEDIMENTARY ROCKS IS ENCLOSED IN TONALITE AND FORMS A SCREEN. THE SCREEN ALSO CONTAINS BIOTITE SCHIST AND NARROW PEGMATITE DIKES ALONG BEDDING.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Year of first production 1927
Production years PRE-1927, 1940, 1959

Mining district

District name Jacumba

Land status

Ownership category BLM Administrative Area
Area name Wilderness

Comments on the production information

  • A FEW HUNDRED TONS MINED IN 1940 AND 1950.

Workings at the site

  • Type of workings Surface
    Overall depth 10.67M
    Overall length 21.34M

Comments on the workings information

  • WORKINGS ARE COMPOSED OF AN OPEN CUT 70 FT ACROSS AND 35 FT HIGH. THERE ARE 3 SMALL PROSPECT PITS IN THE SKARN ZONES.

Reference information

Bibliographic references

  • 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 BULLETIN 1711-D, 18 P.

  • Deposit

    MORTON, PAUL K., 1977, GEOLOGY AND MINERAL RESOURCES OF IMPERIAL COUNTY, CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY, COUNTY REPORT NO. 7, P. 7.

  • Deposit

    SAMPSON, R.J., AND TUCKER, W.B., 1942, MINERAL RESOURCES OF IMPERIAL COUNTY: CALIFORNIA DIVISION OF MINES BULL., VOL. 38, H2, P. 130.

  • Other Database

    CIMRI

  • Reserve-Resource

    TODD AND OTHERS, 1987.

General comments

Subject category Comment text
Deposit COARSELY CRYSTALLINE, WHITE TO GRAY LIMESTONE THAT FORMS A 1600 FT LONG LENS THAT IS UP TO 30 FT THICK WITHIN A LARGER TABULAR BODY OF METASEDIMENTARY ROCKS (SEE GEOLOGIC COMMENTS). THE LIMESTONE CONTAINS MINOR SCHIST AND GRAPHITE AS WELL AS IRREGULAR SKARN PODS ALONG ITS MARGINS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-90 Orris, Greta J. U.S. Geological Survey
Updater 01-JUN-93 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.