USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Nevada · Humboldt County
Mary Clough Mine
Unconfirmed Gold Mixed Underground / Surface
Key facts
- State
- Nevada
- County
- Humboldt
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Gold
- Verification
- Unconfirmed
Also known as
- Charlestown Hill National Mines, NBMG Sample Site 2384, Magnussen Property
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
Sec 3 T40N R38E Gold Silver tungsten Deposit: Hornfels, shale, and schist are cut by a large steeply-dipping granodiorite dike 250 ft wide and a smaller aplite dike. All rock types are cut by quartz veins and veinlets up to 2 ft wide. Larger veins con…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 4 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
Operators / organizations
- Charlestown Hill National Mines, Inc. · Source-reported owner
Commodities & minerals
Reported minerals
- Chalcopyrite
- Gold
- Scheelite
- Silver
- Chalcopyrite
- commodity:Gold
- commodity:Silver
- commodity:Tungsten
View all 14 reported minerals
- Chalcopyrite
- Gold
- Scheelite
- Silver
- Chalcopyrite
- commodity:Gold
- commodity:Silver
- commodity:Tungsten
- Diorite
- Native Gold
- Pyrite
- Quartz
- Scheelite
- Shale
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 adit symbols (4)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 59700
Supports:
- locality identity
- reported minerals (10)
A Mindat locality match does not by itself establish underground workings.
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