USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Yuba County
Ayer
Unconfirmed Copper Underground
Key facts
- State
- California
- County
- Yuba
- Development status
- Occurrence
- Mine type
- Underground
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cu mine located in sec. 35, T16N, R5E, MDM, 3.6 km (2.2 miles) ENE of Hammonton, and about 4 miles W of Smartville. MRDS database accuracy for this location is not stated. Mineralization is a vein deposit hosted in slate. The ore body strik…
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: Occurrence
Commodities & minerals
Reported minerals
- Calcite
- Quartz
- Chalcopyrite
- Pyrite
- Calcite
- Chalcopyrite
- Pyrite
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: 98492
Supports:
- locality identity
- reported minerals (3)
A Mindat locality match does not by itself establish underground workings.