Mine detail: Star of the West Mine

Previously called 'Ainsworth'

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Location

Lat / long:

37.61196, -105.27112

Resource(M)

Primary:	Iron
Secondary:	Gold, Silver
Tertiary:	Copper
Ore:	Hematite, Magnetite
Gangue:	Calcite, Chlorite, Epidote, Garnet, Pyrite
Orebody form:	TABULAR

Production

Operation type:	Underground
Deposit type:	Replacement
Production size:	Small
Development status:	Past Producer
First production started:	1877
Last production ended:	1883

Geology

Host rock:	Minturn Formation
Host type:	Limestone
Associated rock:	Monzonite Porphyry
Associated type:	Monzonite
Structure:	Sierra Blanca Massif, Ft. Garland Embayment, Vega Cr. Anticline, Wagon Mesa Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns.)
Alteration processes:	Limonite In Irregular Zone At Base Of Magnetite Ore; Some Copper Carbonate

References

MRDS	DC02744
DEP	10017027
Reference	{Deposit:: PATTON, H.B., AND OTHERS, 1910, GEOLOGY OF THE GRAYBACK MINING DISTRICT, COSTILLA COUNTY, COLORADO: CGS BULL. 2.}{Deposit:: WARNER, L.A., AND OTHERS, 1959, OCCURRENCES OF NONPEGMATITIC BERYLLIUM IN THE UNITED STATES: USGS PROF. PAPER 3182 P. 165.}{Deposit:: HARPER, C.M., AND TESCH, W.J., JR., 1959, RECONNAISSANCE OF IRON OCCURRENCES IN COLORADO: USBM IC-7918, P. 22.}{Deposit:: CONSV. DIV. COMP. DATE, 1,64}{Production:: HARPER AND TESCH, 1959}
Reporter	Schwochow, Stephen D.