Mine detail: Invincible Shaft

Previously called ''

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Location

Lat / long:

38.10779, -105.34807

Resource(M)

Primary:	Silver, Copper
Secondary:	Lead, Iron
Ore:	Chalcopyrite, Covellite, Galena, Malachite, Pyrite, Silver, Stephanite, Tetrahedrite
Gangue:	Barite, Calcite, Clay
Discovery year:	1895

Production

Operation type:	Underground
Production size:	None
Development status:	Past Producer

Geology

Host type:	Andesite
Associated rock:	Rosita Andesite
Associated type:	Andesite
Structure:	Rosita Cauldron And Crater Complex, North-Trending Fissures Dipping 60 To 70 Degrees East; Trachyte Dike Nearby
Tectonic:	Wet Mountains
Alteration processes:	Weakly Argillized, Strongly Argillized In Places

References

MRDS	D007664
DEP	10012192
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: SIEMS, P.L., 1967, VOLCANIC AND ECONOMIC GEOLOGY OF THE ROSITA HILLS AND SILVER CLIFF DISTRICTS, CUSTER COUNTY, COLORADO: COLORADO SCHOOL MINES, D.SC THESIS, T1042, 222 P.}{Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAPS I-1081.}{Reserve-Resource:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}
Reporter	Collins, Donna B., Beach, Richard A.