USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Alameda County
Black Jack
Unconfirmed Manganese Underground
Key facts
- State
- California
- County
- Alameda
- Mining district
- Tesla
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Manganese
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Mn-silica occurrence/mine located in the SW¼NE¼ sec. 14, T4S, R3E, MDM, 3.1 km (1.9 miles) E of Mendenhall Springs, on private land (fee ownership). Discovered in 1884. Owned by W. Holm and L.S. & L.J. Ione (100%), Livermore, California (1975)…
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
Operators / organizations
- Holm, W. And Ione, L. S., And L. J. · Source-reported owner · 1975
Commodities & minerals
Reported minerals
- Chert
- commodity:Manganese
- commodity:Silica
- Jasper
- Psilomelane
- Pyrolusite
- Quartz
- Shale
View all 9 reported minerals
- Chert
- commodity:Manganese
- commodity:Silica
- Jasper
- Psilomelane
- Pyrolusite
- Quartz
- Shale
- Wad
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: 73354
Supports:
- locality identity
- reported minerals (9)
A Mindat locality match does not by itself establish underground workings.
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