بررسي ژئوشيميايي نهشته هاي آهكي سازند كنگان به منظور تعيين كاني شناسي اوليه و آب و هواي ديرينه در ميدان پارس جنوبي ، خليج فارس

The Study of Limestone Deposits of Kangan Formation: Application for Original Mineralogy and Paleoclimatology, South Pars Field, Persian Gulf

The reservoir part of Kangan Formation with thickness of 115 m is a carbon ate-evaporate sequence that is considered as a part of the largest carbonate reservoir in the South Pars Field in the Persian Gulf. Based on the facies studies the Kangan Formation consists of 12 microfacies and 4 facies belts, such as tidal flat, lagoon, shoal and open marine. The elemental studies and oxygen-carbon isotopic trends in limestone samples indicate that these sediments were deposited in a tropical shallow environment and aragonite was original carbonate mineralogy. Kangan Formation has undergone a meteoric diagenesis in a closed diagenetic system. Variation of minor elements and their ratios along the stratigraphic column, and particularly between Dalan-Kangan Formations, clearly determined the boundary between these two formations. This variation is related to diagenetic and facies variations.