USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Cochise County
Keystone Mine
Unconfirmed Silver Underground
Key facts
- State
- Arizona
- County
- Cochise
- Mining district
- Cochise District
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Silver
- Verification
- Unconfirmed
Also known as
- Bannon Group, Hagerman
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A copper mine, part of the Gunnison Copper Project.
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 10 shaft symbols
- 1 adit symbol
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- Derived from MRDS oper_type (existing operation): Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Underground · oper_type
Verification
Unconfirmed
Source records support underground workings, but UndergroundMines has not yet independently verified this mine.
Why it's listed
USGS source data documents underground workings for this record.
History & operations
Historical record
- Development status: Past Producer
Operators / organizations
- Aztec Mining And Development Co. · Historical operator · 1973
- Coronado Copper And Zinc Co. · Historical operator · 1973
- Keystone Copper Mining Co. · Historical operator · 1973
Commodities & minerals
Reported minerals
- Bornite
- Chalcopyrite
- Gold
- Molybdenite
- Pyrite
- Scheelite
- Silver
- Sphalerite
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 (10)
- mapped adit symbols (1)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 424984
Supports:
- locality identity
A Mindat locality match does not by itself establish underground workings.
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