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San Gabriel Anorthosite

Prospect in Los Angeles county in California, United States with commodities Aluminum, Titanium, Calcium, Iron, Magnesite, Potassium, Silica, Sodium
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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. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Reserves and resources
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10236223
MAS/MILS ID 0060370002
Record type Site
Current site name San Gabriel Anorthosite
Related records 10076786

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -118.2281, 34.38671 (WGS84)
Elevation 1420
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Los Angeles(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Acton(quadrangle 1:24,000 scale)

Los Angeles(quadrangle 1:100,000 scale)

Los Angeles(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Santa Clara(hydrologic unit)

Ventura-San Gabriel Coastal(hydrologic accounting unit)

Southern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Angeles 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 Los Angeles

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004 N 013 W 34 California

Commodities

Commodity Importance
Aluminum Critical Primary
Titanium Critical Primary
Calcium Tertiary
Iron Tertiary
Magnesite Tertiary
Potassium Tertiary
Silica Tertiary
Sodium Tertiary

Materials information

Materials Type of material
Andesine Ore
Ilmenite Ore
Microcline Ore
Apatite Ore
Magnetite Ore
Chlorite Gangue
Hypersthene Gangue
Muscovite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Anorthosite

Nearby scientific data

Ore Body (1) -118.2281, 34.38671
ListMap

Economic information

Ore body information

  • Strike N65W
    Dip 70N
    Thickness 8000M
    Length 27400M
    Width 152M
    Area 13468HA
    Depth to top 1M
    Field Value
    Type of Orebody #1 OTHER
    Shape of Orebody #1 TABULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control IGNEOUS
    Degree of Wallrock Alter. NONE
    Type of Wallrock Alter. #1 OTHER
    Strike And Dip N65W:70N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 13468
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Both
Significant Yes
Discovery year 1902

Mining district

District name Acton

Mineral rights holdings

Type of mineral rights Federal Lease
Type of mineral rights Fee Ownership

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner U.S. Forest Service
    Home office Dist Of Columbia
    Year 1972

Reserves and resources

  • Type In-situ
    Estimate year 1967
    Inferred 3000000000mt ore
    Total resources 4000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 27 wt-pct Aluminum Major 1967

Comments on the reserve resource information

  • TENS OF MILLIONS OF TONS WITH TIO2 5 TO 10 PERCENT. 70 PERCENT OF ILMENITE RECOVERED IN 47 PERCENT TIO2 ILMENITE CONCENTRATE.

Workings at the site

  • Type of workings Surface
    Area 13468HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method BENCH (BERM)
    Swell Factor .7
    Avg. Overburden Thickness 1
    Primary Material Cover SAND, GRAVEL
    Percentage 100
    Hardness of Ore HARD ROCKS
    Avg. Bench Height (meters) 15
    Max. Pit Slope (degrees) 45
    Capacity 6030
    Capacity Units MT ORE/DAY
    Unit Production Cost 3.83
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1979

Reference information

Bibliographic references

  • Deposit

    CUMMINGS, D. AND R.D. REAGAN. AEROMAGNETIC SURVEY OF THE SAN GABRIEL ANORTHOSITE COMPLEX, SAN GABRIEL MOUNTAINS, SOUTHERN CALIFORNIA. GEOL. SOC. OF AMERICA BULLETIN, V. 87, 1976, P. 675-680.

  • Deposit

    BENSON 1962 BU. MI. R. I. 596

  • Deposit

    LEITCH, H., H.G. IVERSON, AND J.B. CLEMMER. EXTRACTION OF ALUMINA BY LEACHING MELTED AND QUENCHED ANORTHOSITE IN SULFURIC ACID. U.S. BUREAU OF MINES REPT. OF INVESTIG. 6744, 1966, 32 P.

  • Deposit

    LUNDQUIST, R.V. RECOVERY OF ALUMINA FROM ANORTHOSITE, SAN GABRIEL MOUNTAINS, CALIFORNIA, USING THE LIME SODA SINTER PROCESS. U.S. BUREAU OF MINES REPT. OF INVESTIG. 6288, 1963, 12 P.

  • Deposit

    OAKESHOTT, G.B. TITANIFEROUS IRON-ORE DEPOSITS OF THE SAN GABRIEL MOUNTAINS, LOS ANGELES COUNTY, CALIFORNIA. CALIF. DIV. MINES BULLETIN 129, PART P, 1948, P. 245-266.

  • Deposit

    OAKESHOTT, G.B. GEOLOGY AND MINERAL DEPOSITS OF THE SAN GABRIEL QUADRANGLE, LOS ANGELES COUNTY, CALIFORNIA. CALIF. DIV. MINES BULLETIN 172, 1958, 147 P.

Reporter information

Type Date Name Affiliation Comment
Reporter 05-APR-95 Lindsey, David S. U.S. Bureau of Mines
Updater 13-DEC-10 Causey, J. Douglas U.S. Geological Survey Minor additions to geology section

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.