Geochemical studies of carbonate sediments of JeirudFormation atsouthwest Damghan

Abstract:
      Jeirud Formation with Upper Devonian age at southwest Damghan consists 330.5 meter of terrigenous and carbonates sequences. Carbonate sediments of Jeirud Formation are dominated by limestone and dolomite. Based on petrographic studies four dolomite types (dolomicrite, dolomicrosparite, and dolosparite and vein dolomite) and 11 microfacies were recognized.
   Carbonate microfacies consists of mainly of mudstone, wackstone, packstone and grainstone that were deposited in a carbonate ramp setting.
   Major and minor elements support original aragonite mineralogy for Jeirud limestone deposits.
   Elemental data (major and minor elements) were also used to separate limestone from dolomite samples

   General:
     Jeirud Formation with Upper Devonian age at southwest Damghan consists 339.5 meter of terrigenous and carbonates sequences. Carbonate sediments of Jeirud Formation are dominated by limestone and dolomite. Based on petrographic studies four dolomite types (dolomicrite, dolomicrospatite, and dolosparite and vein dolomite) and 11 microfacies were recognized.
   Carbonate microfacies consists of mainly of mudstone wackstone, packstone and grainstone that were deposited in a carbonate ramp setting.
   Major and minor elements support original aragonite mineralogy for Jeirud limestone deposits.
   Elemental data (major and minor elements) were also used to separate limestone from dolomite samples