The Qatar-Cowbandi arc in Persian Gulf during Late Cretaceous- Eocene Epoch

The Qatar-Cowbandi arc is a giant regional anticline with northeast- southwest direction, runs through the Qatar peninsula, extends northeastward through the Iranian sector of the Persian Gulf. The arc in the Iranian part is subject of the study meditation. In this paper the interpretation of 2D seismic in the interval of top of Laffan to top of Jahrum formations, allows the regional research of the arc in the study area. Seismic interpretation in both horizons have distinct indications for existing a platform in the area with northwest- southeast direction, which smoothly dipping toward northeast, with some highs resulted from salt diapirs activity. According to isopach map provided for sedimentary sequence of Ilam-Jahrum formations, which was prepared based on 2D seismic data, the sediments thickness decreases in the platform area. The platform is interpreted as crest of arc, on which low rate of sediment precipitation occurred due to low accommodation space, resulted from the arc uplifting activity. Therefore, the arc and also salt diapers, should be considered as regional important factor in sequence stratigraphy study for the precipitated sediments.