USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Sierra County
Sierra Homestake
Unconfirmed Copper Underground
Key facts
- State
- California
- County
- Sierra
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former lode Au-Cu occurrence/mine located in sec. 1, T20N, R12E, MDM, 1.8 km (1.1 miles) ENE of Bassetts, along the E side of the North Yubaq River at the Carvin Creek homesites and about 4½ miles NNE of Sierra City, on National Forest land. MRDS dat…
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- Derived from MRDS oper_type (existing operation): Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Underground · oper_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
Reported minerals
- Chalcopyrite
- Malachite
- Native Gold
- Quartz
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: 93600
Supports:
- locality identity
- reported minerals (4)
A Mindat locality match does not by itself establish underground workings.
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