Application of elemental analysis for determination of dolomitization model of Surmaq and Abadeh formations in the Hambast section, Abadeh region, Iran

The study area is located 60 km southeast of Abadeh city in the northeastem part of Mountain Hambast .In the concerned area there exists complete outcrops from the Middle to the Upper Permian , and has two stratigraphic sections in the Hambast valley as was based on field evidence , petrography and geochemical analysis based on elemental analysis of (EDS) and (EPMA) methods. Two main groups of dolomite minerals including primary dolomite and secondary dolomite were identified .The Primary dolomitic group (called dolomicrites) show mosaic texture and are more anhedral , The second group (dolomicrosparites ) are subhedral. The dolosparites are often subhedral and uhedral.In dolomicrites , Mg is lower than other dolomites due to the highe Ca content.In general , the amount of Sr in the dolomites studied decreases from dolomicrites to dolosparite and increased Sr in dolomicrites is due to the function of diagenesis processes on aragonite shrlls.