USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Pinal County
Little Hill Mine
Unconfirmed Copper Mixed Underground / Surface
Key facts
- State
- Arizona
- County
- Pinal
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Copper
- Verification
- Unconfirmed
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former surface and underground Cu-Mo-Pb-Ag-flagstone-silica mine located in the SW¼ sec. 5, T10S, R15E, (Oracle 15 minute topo map), about 4¼ miles WSW of Oracle and about 1¼ miles NE of the Biosphere II. Discovered 1885. First claims staked for Au &…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 2 shaft symbols
- 8 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
- Little Hill Mining Co. · Source-reported owner
Commodities & minerals
Reported minerals
- Quartz
- Sericite
- Chalcocite
- Chalcopyrite
- Chrysocolla
- Covellite
- Galena
- Hematite
View all 28 reported minerals
- Quartz
- Sericite
- Chalcocite
- Chalcopyrite
- Chrysocolla
- Covellite
- Galena
- Hematite
- Magnetite
- Malachite
- Melaconite
- Molybdenite
- Pyrite
- Sphalerite
- Chalcocite
- Chalcopyrite
- Chrysocolla
- Covellite
- Galena
- Hematite
- Magnetite
- Malachite
- Molybdenite
- Muscovite
- Pyrite
- Sericite
- Sphalerite
- Tenorite
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)
- mapped adit symbols (8)
Historical mapped features may no longer exist.
Arizona Geological Survey / ADMMR
Type: Historical mine documents
Record: 1 historical document
Supports:
- historical mine identity
- historical mine documentation
Historical documentation does not imply current access or open workings.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 68645
Supports:
- locality identity
- reported minerals (14)
A Mindat locality match does not by itself establish underground workings.
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