Microfacies and sedimentary environment of Kazhdumi Formation on the southern flank of Khami Anticline, east of Izeh Zone

Authors

1 Ph. D. Student, Dept., of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

2 Assist. Prof., Dept., of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

3 Assoc. Prof., Dept., of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

Abstract

In this study, the microfacies and sedimentary environment of the Kazhdumi Formation in the Marin section (southern flank of the Khami Anticline) in the east of Izeh Zone have been investigated. Sedimentological studies turned into the identification of 6 sedimentary microfacies in this formation. These microfacies are formed in a deep environment due to the presence of skeletal grains such as radiolarians, plankton foraminifers, oligosteginids, sponge spicules, ammonite and echinoderm spines. The abundance of phosphate and the presence of glauconite are other characteristics of these microfacies. The presence of shale layers with ammonite and rich in organic matter alternating with the limestone of the Kazhdumi Formation in the Marin section confirms the depth of the sedimentary basin of the Kazhdumi Formation. The above-mentioned evidence shows the deposition of the microfacies of the Kazhdumi Formation in an intrashelf basin in this section. The microfacies identified in the Marin section are formed in the sub-environments of the basin and the outer platform, and no trace of shallower sub-environments can be seen in them.

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