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  3. Mineral Resource Data System (MRDS)

Black Point

Occurrence in Contra Costa county in California, United States with commodities Copper, 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. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10029572
MRDS ID M007209
Record type Site
Current site name Black Point
Related records 10235555

Geographic coordinates

Geographic coordinates: -121.95965, 37.90934 (WGS84)
Relative position NW1/4 NE1/4. TUNNEL AND PROSPECT SYMBOLS ON TOPO MAP. CU PROSPECTS ALSO IN E1/2 NW1/4

Site location context

Political divisions (FIPS codes)

Contra Costa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Clayton(quadrangle 1:24,000 scale)

Stockton(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Suisun Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States California Contra Costa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 001W 27 California

Comments on the location information

  • NW 1/4 , NE 1/4 UTM EST

Commodities

Commodity Importance
Copper Tertiary
Mercury Tertiary

Comments on the commodity information

  • TRACE OF HG IN ORE SPECIMEN

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase

Nearby scientific data

(1) -121.95965, 37.90934
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: CHRYSOCOLLA AND COPPER OXIDES IN A NETWORK OF CARBONATE VEINLETS IN DIABASE. MINERALIZED SHEAR ZONE EXPLORED BY ADIT BEARING N. 80 DEG. W. FOR MORE THAN 50' AND A WINZE, DIPPING N., 30' FEET FROM THE PORTAL.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Comments on the production information

  • PRODUCTION OF CU FROM THE (MOUNT ZION?) MINE IN 1902 AND 1918 LESS THAN 40,000 POUNDS.

Comments on the workings information

  • ADIT, BEARING N 80 W, OVER 50 FT. LONG WITH A WINZE DIPPING N., 30 FT. FROM PORTAL

Reference information

Bibliographic references

  • Deposit

    PAMPEYAN, E.H., 1963 , GEOLOGY AND MINERAL DEPOSITS OF MOUNT DIABLO, CONTRA COSTA COUNTY; CALIFORNIA DIVISION OF MINES AND GEOLOGY, SPECIAL REPORT 80 , P. 21

General comments

Subject category Comment text
Deposit NETWORK OF COPPER VEINLETS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-FEB-1979 Fraticelli, L. A. (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.