Petrography, geochemistry and mineralization of volcanic rock in Sistanak area (South East Qaen)
Subject Areas :Hojat Mahvelati 1 , Rasa 2 , Ida Mohebbi 3
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Keywords: Active continental margin Andesite Calc-alkaline Native copper Sistank Qaen ,
Abstract :
Sistank copper deposit is geographically located in East and South-East city of Qain. In general, copper range in Sistanak is in East Central Zone, part of which is located in the Filishy zone and another part in the Lut Block. The stratigraphy in the study area have shown that old rocks than the Jurassic age in the study area. According to petrographic studies, the volcanic rocks are divided into two groups of lavas (andesite and andesite -basalt) and pyroclastics (tuff and agglomerate). These rocks are placed in a class of high potassium calc-alkaline and calc-alkaline. According to chemical composition, volcanic rocks occur in andesite and andesite-basalts range. Copper is the main mineral in andesitic lavas, including native copper, chalcocite and malachite. In addition, in some samples the iron oxide minerals such as hematite and, gotite are presant. Mineralized zone is placed at the highest level of volcanic lava and the mineral is stratabound. Such characteristics, are indicative of epigenetic in origin. According to geological characteristics and based on geological and mineralogical charactristis, copper deposits in Sistanak is probably similar to Michigan type deposits.
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