USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · San Bernardino County
Trio Group
Unconfirmed Copper Mixed Underground / Surface
Key facts
- State
- California
- County
- San Bernardino
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cu occurrence/group of claims/group of mines located in sec. 21, T14N, R16E, SBM, 2.3 km (1.4 miles) WSW of Barnwell (site) (6 miles S of Ivanpah), on federal reservation land (Mojave National Preserve/East Mojave National Scenic Area). MRDS d…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 3 shaft symbols
- 3 adit symbols
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- USGS MRDS working type: Surface/Underground
- MRDS work_type documents underground workings: Surface/Underground · work_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
Commodities & minerals
Reported minerals
- Garnet
- Bornite
- Chalcopyrite
- Bornite
- Chalcopyrite
- Garnet Group
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 (3)
- mapped adit symbols (3)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 89672
Supports:
- locality identity
- reported minerals (3)
A Mindat locality match does not by itself establish underground workings.
Related underground mines
Amazon
California · San Bernardino County
Unconfirmed Copper Past Producer Underground
Historical mapped workings available
American Eagle
California · San Bernardino County
Unconfirmed Copper Past Producer Underground
Documented shaft/adit evidence
Allured
California · San Bernardino County
Unconfirmed Copper Past Producer Underground
Historical mapped workings available
Allured Copper Mine
California · San Bernardino County
Unconfirmed Copper Past Producer
Historical mapped workings available