USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Cochise County
Commonwealth Mine
Unconfirmed Silica Underground
Key facts
- State
- Arizona
- County
- Cochise
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Silica
- Verification
- Unconfirmed
Also known as
- Ritter, North, Smith, Footwa Ll, Brockman, Discovery Stope, Main, Extension, Pearce Mine, Includes Eisenhart Vein, Rinaud, Hartery Veins
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
A former small underground Ag-Au-Mo-Cu-Pb-V-Silica mine located in the NE¼ sec. 5, T.18S., R.25E, 1/2 mile E of Pearce, on private land. Discovered by John Pearce in 1895. Produced 1895-1979. One of Arizona's major silver producers. Owned at times, or …
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 14 shaft symbols
- 3 adit symbols
View individual source records (2)
Every underlying record used to build the summary above, for research/verification use.
- USGS MRDS working type: Underground
- MRDS work_type documents underground workings: Underground · work_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
- Phelps Dodge Corp. · Historical operator
- C. O. R. Ford Corp. · Source-reported owner
Commodities & minerals
Reported minerals
- Alunite
- Calcite
- Fluorite
- Gypsum
- Hematite
- Jarosite
- Kaolin
- Limonite
View all 40 reported minerals
- Alunite
- Calcite
- Fluorite
- Gypsum
- Hematite
- Jarosite
- Kaolin
- Limonite
- Rhodochrosite
- Sericite
- Siderite
- Argentite
- Cerargyrite
- Chalcocite
- Chalcopyrite
- Chrysocolla
- Embolite
- Galena
- Gold
- Iodyrite
- Molybdenite
- Proustite
- Pyrite
- Silver
- Tetrahedrite
- Wulfenite
- Acanthite
- Adularia
- Alunite
- Amethyst
- Andesite
- Aurichalcite
- Biotite
- Bromargyrite
- Bromine-bearing Chlorargyrite
- Calcite
- Chalcedony
- Chalcocite
- Chalcopyrite
- Chlorargyrite
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 (14)
- mapped adit symbols (3)
Historical mapped features may no longer exist.
Arizona Geological Survey / ADMMR
Type: Historical mine documents
Record: 2 historical documents
Supports:
- historical mine identity
- historical mine documentation
View 2 citations
Historical documentation does not imply current access or open workings.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 10260
Supports:
- locality identity
- reported minerals (14)
A Mindat locality match does not by itself establish underground workings.
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Documented shaft evidence