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 Gold Underground
Key facts
- State
- Nevada
- County
- Humboldt
- Mining district
- National Mining District
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Gold
- Verification
- Mindat Confirmed
Mine Location
Approximate AreaDocumented underground workings
Additional documented workings
-
Tunnel
— documented in 1 source record.
Mindat
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 1 shaft symbol
- 4 adit symbols
View individual source records (3)
Every underlying record used to build the summary above, for research/verification use.
-
Tunnel
Documented in Mindat locality data. Evidence: Sec 33 T46N R39E
- Derived from MRDS oper_type (existing operation): Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Underground · oper_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
- Arsenopyrite
- Calcite
- Chalcopyrite
- Marcasite
- Muscovite
- Pyrite
- Quartz
- Rhyolite
View all 12 reported minerals
- 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 (4)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 59692
Supports:
- locality identity
- reported minerals (12)
- underground workings
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