Application of fluid inclusion to recognition of origin of coarse-crystalline calcite and dolomite cements in Permo-Triassic Kangan and Dalan Formations in South Pars Field, Iran.

fluid inclusion analysis can be a good approach for studying trend diagenesis of calcite secnts in relation with diagenesis envirounment . In this research , kangan and dalan formations in a well in south pars field were considerated for fliuid inclusion analysis. the south pars field the largest offshore field in the world is located on the iran - qatar border in the persian gulf and also is shared by the two countries. kangan/ kalan carbonates are extremely susceptible to mineralogical and textural changes. cementation is one of the important diagenetic proccescess affecting these carbonates. based on petrographic and fluid inclusion analysis , fluid responsible for the cement precipitation in kangan and dalan formations can be subdivided into three groups group 1 is fluid with calcite composition , has Th values 126 C , and salinity 16wt.%NaCl equivalent and is interpreted to have precipitated during early burial from porewater influenced by meteoric water. group 2 fluid with dolomite composition has Th values 127C and salinity 17wt.%NaCl equivalent demonstrated that the coarse dolomete crystals was precipitated possibly during shallow burial.

کلیدواژه ها:

fluid inclusion ، kangan and dalan formations ، south pars field.