USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · San Luis Obispo County
Estrella Mine
Unconfirmed Chromium Underground
Key facts
- State
- California
- County
- San Luis Obispo
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Chromium
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cr-PGE (Ir-Pd-Rh-Ru-Pt) mine located 6.1 km (3.8 miles) NNW of Chorro. Mineralization is a deposit hosted in dunite (Deposit Model: 15: podiform chromite (minor)). Local structures include numerous small joints and fissures. Related t…
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: Past Producer
Commodities & minerals
Reported minerals
- Opal
- Tremolite
- Chromite
- Chromite
- Magnesiochromite
- Opal
- Tremolite
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: 91810
Supports:
- locality identity
- reported minerals (4)
A Mindat locality match does not by itself establish underground workings.
Related underground mines
Johnson Ranch Deposit
California · San Luis Obispo County
Unconfirmed Chromium Past Producer
Chorro Mine
California · San Luis Obispo County
Unconfirmed Chromium Past Producer
Historical mapped workings available
El Divisadero Mine
California · San Luis Obispo County
Unconfirmed Chromium Past Producer
Estrella Mine
California · San Luis Obispo County
Unconfirmed Chromium Past Producer