Physico - chemical evolution of hydrothermal fluid at Sara (Parkam) porphyry copper deposit, Kerman Province

Authors

Department of Geology, Damghan university, Damghan, Iran

Abstract

Abstract
The Saraporphyry copper deposit is located in Kerman and 35 Km northern of Shahr–Babak. This deposit is hosted by Eocene volcanic rocks situated in the Urmia - Dokhtar magmatic belt. This deposit is hosted by volcanic rocks with Eocene age. Mineralization of copper and molybdenum is associated with emplacement of diorite and quartz diorite intrusives with Miocene age. Based on petrographical studies eight types of fluid inclusions including polyphase brine inclusions, opaque-bearing brine inclusions, simple brine inclusions, opaque-bearing vapor-rich inclusions, vapor-rich inclusions, vapor inclusions, opaque-bearing liquid rich inclusions and simple Liquid-rich inclusions can be observed in Sara deposits. Polyphase brine inclusions with maximom frequency of homogenization temperature within the range of 400-500 °C and maximom frequency of salinity within the range of 40-50 Wt. % NaCl are primitive fluids that compose Sara deposits. Liquid-rich inclusions with maximom frequency of homogenization temperature within the range of 300-350 °C and maximom frequency of salinity within the range of 10-20 Wt. % NaCl disply last evolution of hydrothermal fluid. Microthermometric results of fluid inclusions indicate primitive hydrothermal fluids have been trapped in tempereture about 500 °C and pressure of 600 bars. Maximum emplacement depth of the Sara deposit is about 2.3 km. Salinity and homogenization temperature shows that mineralization in the Sara porphyry copper deposit is related to mixing of orthomagmatic and meteoric fluids.
 

Keywords

References

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