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California · Contra Costa County

Summit of Zion

Unconfirmed Copper Underground 1 mapped shaft 3 mapped adits

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Key facts

State
California
County
Contra Costa
Development status
Past Producer
Mine type
Underground
Primary commodity
Copper
Verification
Unconfirmed

Mine Location

Approximate Area

Open in Mine Map

Documented underground workings

Mindat locality description

A former Cu-Fe occurrence/mine located in the NE¼NE¼ sec. 22, T1N, R1W, MDM, 2.6 km (1.6 miles; 8,700 feet) SW of Clayton near the summit of Mount Zion. MRDS database stated accuracy for this location is 100 meters. Operated in the 1860's. Mineraliz…

View full locality record on Mindat

Additional documented workings

  • Adit — documented in 1 source record.
    USGS Historical Topographic Mine Features
  • Shaft — documented in 1 source record.
    USGS Historical Topographic Mine Features

Historical mapped workings

USGS historical topographic mapping. Features may no longer exist.

  • 1 shaft symbol
  • 3 adit symbols
  • Shaft : Clayton , 1953
  • Adit : Clayton , 1953
View individual source records (4)

Every underlying record used to build the summary above, for research/verification use.

  • Adit
    Mapped on historical USGS topographic data (Adit). Historical map features may no longer exist in the field.
  • Shaft
    Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field.
  • USGS MRDS working type: Underground
  • MRDS work_type documents underground workings: Underground · work_type

Verification

Unconfirmed

Source records support underground workings, but UndergroundMines has not yet independently verified this mine.

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Why it's listed

USGS source data documents underground workings for this record.

View sources & evidence

History & operations

Historical record

  • Development status: Past Producer

Commodities & minerals

Reported minerals

  • Iron
  • commodity:Copper
  • Dolerite

Access & recent conditions

Land
unknown

Community reports

No community field reports yet.

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Sources & evidence

USGS Mineral Resources Data System

Type: Historical mine record

Supports:

  • mine identity
  • development status
  • commodities
  • underground eligibility evidence

USGS Historical Topographic Mine Features

Type: Historical mapped physical features

Dataset: DOI 10.5066/P9TAALR6

Supports:

  • mapped shaft symbols (1)
  • mapped adit symbols (3)

Historical mapped features may no longer exist.

Dataset information

Mindat

Type: Mineralogical locality database

Record: Mindat Locality: 76661

Supports:

  • locality identity
  • reported minerals (2)

A Mindat locality match does not by itself establish underground workings.

View on Mindat

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