USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Mariposa County
Heiser
Unconfirmed Copper Underground
Key facts
- State
- California
- County
- Mariposa
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cu mine located in sec. 19, T5S, R19E, MDM, 2.4 km (8,000 feet) ESE of Mariposa (adjoins the Copper Queen I Mine). MRDS database stated accuracy for this location is 1,000 meters. Local rocks include utramafic rocks, chiefly Mesozoic, unit …
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- 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.
Why it's listed
USGS source data documents underground workings for this record.
History & operations
Historical record
- Development status: Past Producer
Commodities & minerals
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 82211
Supports:
- locality identity
A Mindat locality match does not by itself establish underground workings.
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Documented adit evidence