USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Calaveras County
Thorpe Mine
Unconfirmed Gold Underground
Key facts
- State
- California
- County
- Calaveras
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Gold
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former lode Au mine located in the SW¼ (estimated) sec. 11, T3N, R11E, MDM, 2.5 km (1.6 miles) SSW of Quiggs Mountain (coordinates of record), just W of highway 49 (6 miles S of Mokelumne Hill [town]). Operated in a small way prior to 1894. MRDS data…
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
- Ankerite
- Calcite
- Quartz
- Gold
- Pyrite
- Ankerite
- Calcite
- Chlorite Group
View all 14 reported minerals
- Ankerite
- Calcite
- Quartz
- Gold
- Pyrite
- Ankerite
- Calcite
- Chlorite Group
- Muscovite
- Native Gold
- Pyrite
- Quartz
- Sericite
- Talc
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: 75999
Supports:
- locality identity
- reported minerals (9)
A Mindat locality match does not by itself establish underground workings.
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