USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Santa Cruz County
Tres De Mayo Mine Group
Unconfirmed Silver Underground
Key facts
- State
- Arizona
- County
- Santa Cruz
- Mining district
- Palmetto District
- Development status
- Past Producer
- Mine type
- Underground
- Primary commodity
- Silver
- Verification
- Unconfirmed
Also known as
- Hollywood, Union, Peck, Palmetto, Robert E. Bob Lee, Hassayampa, La Palma
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
‡Ref.: Schrader, F.C. (1915) Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, with contributions by J.M. Hill: U.S. Geological Survey Bulletin 582, 373 p., 3 sheets, scale 1:125,000: 290. Moger, S.R. (1969) University of Arizona,…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 16 shaft symbols
- 1 adit symbol
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
- General Development And Mining Co. Tres De Mayo Mine); Frank Otero And Rupert Beyerle · Historical operator
- Arthur Peck And Frank Otero · Source-reported owner
Commodities & minerals
Reported minerals
- Psilomelane
- Quartz
- Argentite
- Cerargyrite
- Chalcopyrite
- Gold
- Malachite
- Sphalerite
View all 22 reported minerals
- Psilomelane
- Quartz
- Argentite
- Cerargyrite
- Chalcopyrite
- Gold
- Malachite
- Sphalerite
- Wulfenite
- Acanthite
- Calderónite
- Cerussite
- Chalcopyrite
- Chlorargyrite
- Galena
- Malachite
- Mimetite
- Nsutite
- Psilomelane
- Silver-bearing Galena
- Sphalerite
- Wulfenite
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 (16)
- mapped adit symbols (1)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 34155
Supports:
- locality identity
- reported minerals (13)
A Mindat locality match does not by itself establish underground workings.
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Documented shaft/adit evidence