USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Nevada · Lyon County
Ann Mason Copper Deposit
Unconfirmed Copper Mixed Underground / Surface
Key facts
- State
- Nevada
- County
- Lyon
- Development status
- Prospect
- Mine type
- Mixed underground / surface
- Primary commodity
- Copper
- Verification
- Unconfirmed
Also known as
- Ann Mason Copper Gold Molybdenum Project, Cast, Minnesota, Ludwig, Douglas Hill, Blue Hills, McConnell, Shamrock
Mine Location
Approximate AreaDocumented underground workings
Source classification: Underground operation documented
Specific physical workings are not yet documented in discrete records.
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 18 shaft symbols
- 21 adit symbols
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
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Prospect
Operators / organizations
- Arco · Source-reported owner
- Arimetco International, Inc. · Source-reported owner
- Giralia · Source-reported owner
- Tibbles Construction Co. (Don and Joy Tibbles) · Source-reported owner · 1991
- PacMag Metals Limited · Historical operator · 2006
Commodities & minerals
Reported minerals
- Bornite
- Chalcocite
- Chalcopyrite
- Pyrite
- Apatite
- Biotite
- Feldspar
- Hornblende
View all 13 reported minerals
- Bornite
- Chalcocite
- Chalcopyrite
- Pyrite
- Apatite
- Biotite
- Feldspar
- Hornblende
- Ilmenite
- Magnetite
- Quartz
- Sphene
- Zircon
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 (18)
- mapped adit symbols (21)
Historical mapped features may no longer exist.
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