Twin Buttes

Past ProducerCopper Sulfide, Copper OxideSurfaceUSGS MRDS

Location

StateArizona
CountyPima
Coordinates31.90822, -111.05069

Commodities

PrimaryCopper Sulfide, Copper Oxide
SecondaryLead, Silver, Molybdenum, Gold
TertiaryUranium, Zinc, Wollastonite

Mine Details

StatusPast Producer
TypeSurface
Deposit TypePorphyry Cu, Skarn Related
First Production1969
Last Production1994
Discovery Year1870
Data SourceUSGS MRDS
Source ID10234825

What This Means

This mine is a past producer — it was once operational but is no longer actively mining. Past producer sites may still have environmental impacts including disturbed land, tailings piles, and potential water quality effects. Some past producer sites have been reclaimed, while others remain as-is. Check with your state mining or environmental agency for current site conditions.

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