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  3. Mineral Resource Data System (MRDS)

Gibraltar

Producer in Santa Barbara county in California, United States with commodity Mercury
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. Reporter information

Geologic information

Identification information

Deposit ID 10040879
MRDS ID M055758
Record type Site
Current site name Gibraltar
Alternate or previous names Falcon, Santa Ynez, Mc Avoy - Millburn
Related records 10286880

Geographic coordinates

Geographic coordinates: -119.65761, 34.52361 (WGS84)
Elevation 457
Relative position 2 MI E OF GIBRALTAR DAM, 18 MI N OF SANTA BARBARA

Site location context

Political divisions (FIPS codes)

Santa Barbara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Little Pine Mountain(quadrangle 1:24,000 scale)

Cuyama(quadrangle 1:100,000 scale)

Los Angeles(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Santa Ynez(hydrologic unit)

Central California Coastal(hydrologic accounting unit)

Central California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Los Padres 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 Santa Barbara

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 005N 027W 12,13 California

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore

Alteration

  • (Local) Silica Carbonate Alteration Of Serpentine

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Franciscan Complex
    Rock description Franciscan Complex
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -119.65761, 34.52361
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Local Faults And Cross Fractures, Franciscan-Knoxville Contact

Ore body information

  • General form LENS
    Strike NW
    Dip SW

Controls for ore emplacement

  • Faults And Cross Fractures, Fault Gouge

Comments on the geologic information

  • GEOL.DESC: STRAT. SECTION OVERTURNED AT THE MINE

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1908
Year of first production 1939
Production years 1917 - 1918, 1939 - 1944

Mining district

District name Los Prietos

Ownership information

  • Type Owner
    Owner Gibraltar Mining Co.

Production statistics

  • Year 1962
    Period To 1962
    Material HG
    Accuracy Estimate
    Description Cp_Grade: ^2-10 Lb/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Mercury Mercury 2711g/mt

Workings at the site

  • Type of workings Surface/Underground
    Length 234.7M

Comments on the workings information

  • PARTIALLY CAVED

Reference information

Bibliographic references

  • Deposit

    HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Deposit

    BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.

  • Deposit

    RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-486

  • Deposit

    5) TUCKER, W.B., 1925, MINING IN CALIFORNIA, SANTA BARBARA COUNTY: REPT. OF THE STATE MINERALOGIST, V. 21, P. 542-544

  • Production

    USBM DATA

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.