USGS Mineral Resources Data System
Type: Historical mine record
Supports:
- mine identity
- development status
- commodities
- underground eligibility evidence
Arizona · Santa Cruz County
Margarita Mine Group
Unconfirmed Gold Mixed Underground / Surface
Key facts
- State
- Arizona
- County
- Santa Cruz
- Mining district
- Oro Blanco
- Development status
- Past Producer
- Mine type
- Mixed underground / surface
- Primary commodity
- Gold
- Verification
- Unconfirmed
Also known as
- Golden Eagle, Mcdonald, Rob Roy
Mine Location
Approximate AreaDocumented underground workings
Mindat locality description
Ref.: Wilson, E.D., Cunningham, J.B., and Butler, G.M. (1934), Arizona Lode Gold Mines and Gold Mining (revised 1967), Arizona Bureau of Mines Bull. 137: 191-192. Knight, L.H., Jr. (1970) Structure and mineralization of the Oro Blanco mining distric…
Historical mapped workings
USGS historical topographic mapping. Features may no longer exist.
- 4 shaft symbols
- 11 adit symbols
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): Surface-Underground
- MRDS oper_type documents existing underground operation (dev_stat=Past Producer): Surface-Underground · oper_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
- Newfields Minerals, Inc. · Historical operator · 1988
Commodities & minerals
Reported minerals
- Chalcopyrite
- Galena
- Gold
- Limonite
- Muscovite
- Pyrite
- Quartz
- Sericite
View all 10 reported minerals
- Chalcopyrite
- Galena
- Gold
- Limonite
- Muscovite
- Pyrite
- Quartz
- Sericite
- 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 (4)
- mapped adit symbols (11)
Historical mapped features may no longer exist.
Mindat
Type: Mineralogical locality database
Record: Mindat Locality: 34056
Supports:
- locality identity
- reported minerals (6)
A Mindat locality match does not by itself establish underground workings.
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