SMUGGLER MINE GOLD ORE
Gold-quartz hydrothermal vein - here's a nice gold ore sample from a quartz-gold
vein in southwestern Colorado's Telluride Mining District. This is from
the Smuggler Vein, which cuts through Oligocene- and Miocene-aged rhyolites,
andesites, and volcanic tuffs of the San Juan Formation, a thick unit of
extrusive igneous rocks in the San Juan Volcanic Field.
The Smuggler Vein is one of several mineralized veins
developed along steeply-dipping fractures formed during volcanic-related uplift
in the Silverton, Colorado area and the Stony Mountain, Colorado area.
Uplift & fracture formation occurred during the mid-Oligocene, followed by
gold mineralization during the late Early Miocene.
Geologic Unit & Age: Smuggler Vein, San Juan Volcanic Field, gold-quartz
hydrothermal mineralization in the late Early Miocene, ~17 million years.
Smuggler-Union Consolidated Mine (Smuggler Mine), Telluride Mining District (a.k.a.
Upper San Miguel District), eastern San Miguel County, southwestern Colorado,
(CSM # 54581, Colorado School of Mines Geology Museum,
Golden, Colorado, USA)