USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
California · Tuolumne County
Mackey Mine
Unconfirmed Chromium Underground
Key facts
- State
- California
- County
- Tuolumne
- Mining district
- Jamestown Area
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Chromium
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former Cr mine located in sec. 21, T1N, R14E, MDM, 2.6 km (8,400 feet) WNW of Stent and 3.1 km (1.9 miles) SSW of Jamestown, NW of Quartz Mountain and W of Quartz, on private land (fee ownership). Discovered in 1865. Operated during the period 1865 t…
View individual source records (3)
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
- 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
- W. A. Fitzgerald-Last Operator,1918 · Historical operator · 1976
- Gradella, John · Source-reported owner · 1976
Commodities & minerals
Reported minerals
- Antigorite
- Asbestos
- Chromite
- Fayalite-Forsterite Series
- Magnesiochromite
- Olivine
- Pyroxene
- Pyroxene Group
View all 10 reported minerals
- Antigorite
- Asbestos
- Chromite
- Fayalite-Forsterite Series
- Magnesiochromite
- Olivine
- Pyroxene
- Pyroxene Group
- Talc
- Uvarovite
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: 97936
Supports:
- locality identity
- reported minerals (8)
A Mindat locality match does not by itself establish underground workings.
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