Mine detail: New Shaft

Previously called 'Whistle Pipe'

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Location

Lat / long:

38.12807, -105.33029

Resource(M)

Primary:	Gold, Silver
Secondary:	Zinc, Copper, Lead
Ore:	Chalcopyrite, Jamesonite, Smithsonite, Sphalerite, Tetrahedrite
Gangue:	Calcite, Dolomite, Pyrite, Quartz, Stibnite
Orebody form:	breccia pipe
Discovery year:	1877

Production

Operation type:	Underground
Production size:	Small
Development status:	Past Producer
First production started:	1878

Geology

Host type:	Tuff,Volcanic Breccia (Agglomerate),Andesite
Structure:	Rosita Volcanic Center, Wet Mtns, Breccia Pipe, Faults, Fractures, Mineralized Fissures
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Strongly Argillized; Quartz Zone

References

MRDS	D007931
DEP	10087577
Reference	{Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: SHARP, W.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.}
Reporter	Collins, Donna B.