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Black Eagle

Producer in Santa Clara 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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10109392
MRDS ID M020185
Record type Site
Current site name Black Eagle
Related records 10237517

Geographic coordinates

Geographic coordinates: -121.42824, 37.37992 (WGS84)
Relative position S. SIDE OF BEAUREGARDE CREEK, ABOUT 1/4 MI. W. OF THE MAY BE CLAIM.

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Boardman(quadrangle 1:24,000 scale)

San Jose(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Santa Clara

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006S 005E 28 California

Comments on the location information

  • LOCATED IN SE 1/4 SECTION 28

Commodities

Commodity Importance
Manganese Critical Primary

Analytical data

Result AVERAGE GRADE 25 PERCENT MANGANESE

Nearby scientific data

(1) -121.42824, 37.37992
ListMap

Economic information

Ore body information

  • Width 1.52M

Comments on the geologic information

  • GEOL.DESC: LARGE BOULDER LIKE MASSES OF ORE HAVE STRIKE LENGTH OF 40 FT. ORE IS SILICEOUS MANGANESE OXIDE, VERY DISCONTINUOUS AND VARIABLE IN TENOR. IT IS ASSOCIATED WITH GREENSTONE AND ALTERED GREENISH SANDSTONE. ORE BED STRIKES N 30 W, AND PROBABLY DIPS 20 S. W., WITH 5 FT. MAXIMUM WIDTH. QUARTZ VEINLETS CUT THE BED. ANOTHER ORE BODY, 10 FT. LONG, 4 FT. WIDE, IS ASSOCIATED WITH GREENSTONE AND ALTERED SHALE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 P. 247

  • Deposit

    D.O.M. BULL. 125 1943 P. 175

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 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.