Stratigraphic, Lithological and Structural Controls in Replacement of Nakhlak Deposit (Northeast of Esfahan)

Authors

1 Research Center for Ore deposit of Eastern Iran, Ferdowsi University of Mashhad

2 Department of Geology, Ferdowsi University of Mashhad

Abstract

     The Nakhlak deposit occurred as stratabound and epigenetic deposit in Upper Cretaceous carbonate rocks. Ashin formation as shale barrier in the vicinity of the mineralized zone keep ore bearing fluids within carbonate until ore deposition process has been done. Host rock had suitable properties for mineralization such as presence of the reef facies, limestone to dolostone transition and presence of hydrothermal dolomites. These characteristic increases the porosity and permeability of host rock. Fractures and normal faults contain most of the mineralization in veins with steep (65-90) and 85 ± 5 Azimuth. Qaleh Bozorg Fault as principal displacement zone, which veins have been placed with 45 ± 5 ° to it. According to position of the mineralization in hanging wall of this fault and the high intensity of the mineralization around this fault, the Qaleh Bozorg Fault can be considered as a main factor in creating space structure and the main pedestrian for entrance ore fluids into the upper Cretaceous rocks.
 
 

Keywords

References

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