USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Inyo County
Boraxo Mine
Unconfirmed Boron-Borates Mixed Underground / Surface
Key facts
- State
- California
- County
- Inyo
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Boron-Borates
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former borate mine located in the NE¼NE¼ sec. 36, T26N, R2E, SBM, 2 miles (3.22 km) WNW of Ryan (S of hill 2562), on National Park Service land (Death Valley National Park). Discovered in 1915. Operated by Tenneco Mining Inc. (1976). Owned by the Pac…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 2 shaft symbols
- 2 adit symbols
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): Surface-Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Surface-Underground · oper_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- Tenneco Mining, Inc. · Historical operator
Commodities & minerals
Reported minerals
- Calcite
- Celestine
- Clay
- Clay minerals
- Colemanite
- commodity:Boron
- Hydroboracite
- Mudstone
View all 15 reported minerals
- Calcite
- Celestine
- Clay
- Clay minerals
- Colemanite
- commodity:Boron
- Hydroboracite
- Mudstone
- Priceite
- Probertite
- Sandstone
- Shale
- Siltstone
- Tunellite
- Ulexite
Access & recent conditions
- Land
- unknown
Community reports
No community field reports yet.
I Visited This MineSources & evidence
USGS Historical Topographic Mine Features
Type: Historical mapped physical features
Dataset: DOI 10.5066/P9TAALR6
Supports:
- mapped shaft symbols (2)
- mapped adit symbols (2)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 5571
Supports:
- locality identity
- reported minerals (15)
A Mindat locality match does not by itself establish underground workings.
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