Commodities
PrimaryIron
SecondaryGold, Silver
TertiaryCopper
Commodity typeM
Deposit
Deposit typeReplacement
Model62: Skarn Fe
Deposit sizeS
Orebody formTABULAR
Ore controlFault, Igneous Intrusion
Materials
Ore mineralsHematite, Magnetite
GangueCalcite, Chlorite, Epidote, Garnet, Pyrite
Geology
Host rockLimestone · Minturn Formation
Associated rockMonzonite · Monzonite Porphyry
StructureSierra Blanca Massif, Ft. Garland Embayment, Vega Cr. Anticline, Wagon Mesa Fault
Tectonic settingCentral Cordillera (Southern Rocky Mtns.)
AlterationLimonite In Irregular Zone At Base Of Magnetite Ore; Some Copper Carbonate
Economic & production
Development statusPast Producer
First production1877
Last production1883
Identification
Deposit ID10017027
MRDS IDDC02744
Alternate namesAinsworth
RegionNA
Data scoreB
Coordinates37.61196, -105.27112
References
PATTON, H.B., AND OTHERS, 1910, GEOLOGY OF THE GRAYBACK MINING DISTRICT, COSTILLA COUNTY, COLORADO: CGS BULL. 2.WARNER, L.A., AND OTHERS, 1959, OCCURRENCES OF NONPEGMATITIC BERYLLIUM IN THE UNITED STATES: USGS PROF. PAPER 3182 P. 165.HARPER, C.M., AND TESCH, W.J., JR., 1959, RECONNAISSANCE OF IRON OCCURRENCES IN COLORADO: USBM IC-7918, P. 22.CONSV. DIV. COMP. DATE, 1,64HARPER AND TESCH, 1959