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Black Brothers

Occurrence in Los Angeles county in California, United States with commodity Manganese
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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. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10095173
MRDS ID M020054
Record type Site
Current site name Black Brothers
Alternate or previous names Llewellyn Iron
Related records 10188037

Geographic coordinates

Geographic coordinates: -118.18729, 34.58279 (WGS84)
Relative position ON PORTAL RIDGE, 4.3 MI. BY ROAD W. OF PALMDALE.

Site location context

Political divisions (FIPS codes)

Los Angeles(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ritter Ridge(quadrangle 1:24,000 scale)

Lancaster(quadrangle 1:100,000 scale)

Los Angeles(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Antelope-Fremont Valleys(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Los Angeles

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 006N 012W 30 California

Comments on the location information

  • PART OF AMARGOSA GROUP, LLEWELLYN IRON, LOCATED IN N.E. 1/4 SECTION 30 , UTM APPROX

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Psilomelane Ore
Rhodonite Ore
Spessartite Ore

Analytical data

Result AVERAGE GRADE 20 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Cambrian

Nearby scientific data

(1) -118.18729, 34.58279
ListMap

Economic information

Ore body information

  • Strike N 20 TO 45 W
    Dip 55 TO 65 N E
    Thickness 2.74M
    Length 50.29M
    Depth to bottom 3.05M

Comments on the geologic information

  • GEOL.DESC: MANGANIFEROUS BED OF QUARTZITE (METAMORPHOSED CHERT) ENCLOSED IN THE QUARTZ MICA PELONA SCHIST, OF PRECAMBRIAN AGE. MANGANIFEROUS BED IS 1 1/2 TO 9 FT THICK; 165 FT. LONG, AND MAXIMUM DEPTH IS 10 FT. THE ORE IS OFFSET BY SMALL CROSS FAULTS. THE MANGANESE ORE IS PARTIALLY OXIDIZED RHODONITE AND SPESSARTITE, CUT BY QUARTZ VEINLETS. SOME MATERIAL HAS BEEN OXIDIZED TO PSILOMELANE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 PP. 100 - 101

  • Deposit

    D.O.M. BULL. 125 1943 P. 65 , 129

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1977 Killman, K.; Albers, J. 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.