USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Nevada · Mineral County
Borealis Mine
Source Corroborated Gold Mixed Underground / Surface 2 mapped shafts
Key facts
- State
- Nevada
- County
- Mineral
- Development status
- Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Gold
- Verification
- Source Corroborated
Also known as
- Deep Ore Flats, East Ridge, Freedom Flats, Gold View, Graben, Jaimes Ridge, Northeast Ridge orebodies
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
Structure: Major regional structural trends affecting the mine area are the Walker Lane shear zone and the Borealis Trend. NE-trending faults with subordinate N-S and E-W- striking structures. Alteration: Host rock alteration consists mainly of pervas…
Additional documented workings
-
Shaft
— documented in 2 source records.
USGS Historical Topographic Mine Features
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 2 shaft symbols
- Shaft : Aurora , 1956
- Shaft : Aurora , 1956
View individual source records (4)
Every underlying record used to build the summary above, for research/verification use.
-
Shaft
Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field. -
Shaft
Mapped on historical USGS topographic data (Mine Shaft). Historical map features may no longer exist in the field.
- Derived from MRDS oper_type (existing operation): Surface-Underground
- MRDS oper_type documents existing underground operation (dev_stat=Producer): Surface-Underground · oper_type
Verification
Source Corroborated
Additional historical source evidence corroborates this record. This is not a member field verification of current conditions.
Why it's listed
Source records document both underground and surface mining.
History & operations
Historical record
- Development status: Producer
Commodities & minerals
Reported minerals
- Quartz
- Alunite
- Arsenopyrite
- Barite
- Chalcocite
- Chalcopyrite
- Cinnabar
- Covellite
View all 40 reported minerals
- Quartz
- Alunite
- Arsenopyrite
- Barite
- Chalcocite
- Chalcopyrite
- Cinnabar
- Covellite
- Enargite
- Feldspar
- Gold
- Hematite
- Kaolinite
- Marcasite
- Matildite
- Montmorillonite
- Nagyagite
- Niccolite
- Pyrite
- Pyrrhotite
- Sphalerite
- Tennantite
- Tetrahedrite
- Alunite
- Andesite
- Arsenopyrite
- Baryte
- Chalcocite
- Chalcopyrite
- Cinnabar
- commodity:Copper
- commodity:Gold
- commodity:Nickel
- commodity:Silver
- commodity:Zinc
- Covellite
- Enargite
- Feldspar Group
- Hematite
- Kaolinite
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 (2)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 280812
Supports:
- locality identity
- reported minerals (17)
A Mindat locality match does not by itself establish underground workings.
Related underground mines
Borealis Mine
Nevada · Mineral County
Source Corroborated Gold Producer Mixed Underground/Surface
Documented shaft evidence
Ashby Gold Mine
Nevada · Mineral County
Unconfirmed Gold Past Producer Underground
Documented shaft evidence
Ackerman Mine
Nevada · Mineral County
Unconfirmed Gold Past Producer
Historical mapped workings available
Aurora Mine
Nevada · Mineral County
Unconfirmed Gold Plant