Microfacies Analysis, Depositional Environments and Sedimentary Model of Burdigalian Cycle in Zurbatiya Area, South-East of Iraq

Abstract

The stratigraphy and sedimentology study of Serikagni and Euphrates Formations of two surface sections in the area of Zurbatiya, located in the south-east of Iraq, the first section is represented by Wadi AL-Hashima section, and the second is represented by Ci-Coran section, research rocks composed from a repetition of limestone and marl rocks, and thess rocks located within sedimentary cycle called (Burdigalian Cycle), this cycle includ of Serikagni, Euphrates and Dhbban Formations, considers study area represents area overlap between Serikagni and Euphrates Formations.

Sedimentary microfacies were classified to main microfacies and submicrofacies where the recognized microfacies of Serikagni Formation are lime mudstone, lime wacketone, lime packstone and dolomitized limestone microfacies while Euphrates Formation is benthonic foraminiferal lime wackstone microfacies which is contains bioturbation, that precipitated in the standard microfacies (SMF,2,3,4,8,7) and the five facies zones (FZ-1) of basin environment, (FZ-2) in the open sea shelf environment, (FZ-3) in the deep shelf margin environment, (FZ-4) in the fore slope environment, (FZ-5) fore reef environment.

The correlation between the studied sections depending on these microfacies and the variations between the studied formation, we deduced the sedimentary environment for these formations and draw sedimentary model.