USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Nevada · Humboldt County
Chefoo Tunnel
Mindat Confirmed Silver Underground 1 mapped shaft 6 mapped adits
Key facts
- State
- Nevada
- County
- Humboldt
- Mining district
- National District
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Silver
- Verification
- Mindat Confirmed
Also known as
- Probably Same As Birthday Mine, Round Hill Prospect
Mine Location
Approximate AreaDocumented underground workings
Additional documented workings
-
Adit
— documented in 1 source record.
USGS Historical Topographic Mine Features -
Tunnel
— documented in 1 source record.
Mindat
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 1 shaft symbol
- 6 adit symbols
- Adit : Mc Dermitt , 1959
View individual source records (4)
Every underlying record used to build the summary above, for research/verification use.
-
Adit
Mapped on historical USGS topographic data (Adit). Historical map features may no longer exist in the field. -
Tunnel
Documented in Mindat locality data. Evidence: Sec 33 T46N R39E
- USGS MRDS working type: Underground
- MRDS work_type documents underground workings: Underground · work_type
Verification
Mindat Confirmed
Mindat locality corroborates underground workings.
Why confirmed?
Mindat locality corroborates underground workings.
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
- Chalcopyrite
- Marcasite
- Pyrite
- Sphalerite
- Stibnite
- Arsenopyrite
- Calcite
- Chalcopyrite
View all 17 reported minerals
- Chalcopyrite
- Marcasite
- Pyrite
- Sphalerite
- Stibnite
- Arsenopyrite
- Calcite
- Chalcopyrite
- Marcasite
- Muscovite
- Pyrite
- Quartz
- Rhyolite
- Sericite
- Sphalerite
- Stibnite
- Tetrahedrite Subgroup
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 (1)
- mapped adit symbols (6)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 59692
Supports:
- locality identity
- reported minerals (12)
- underground workings
Related underground mines
Buckskin National Mine
Nevada · Humboldt County
Source Corroborated Gold Past Producer Underground
Documented adit evidence
Canyon Creek Prospect
Nevada · Humboldt County
Unconfirmed Mercury Past Producer Underground
Blaine and Kasper Property
Nevada · Humboldt County
Mindat Confirmed Silver Past Producer Underground
Blum Shaft
Nevada · Humboldt County
Mindat Confirmed Gold Occurrence Mixed Underground/Surface
Documented shaft/adit evidence