عنوان مقاله [English]
In order to identify and understand the post-depositional history of carbonate rocks in Bagh-e Vang Formation, tow stratigraphy sections of Bagh-e Vang and Shesh Angosht have been selected in north Tabas( east central Iran). Collected samples were investigated based on the fossils, sedimentary environment and diagenetic processes. According to the study of fossils , the age of the Formation in these sections is late Yakhtashian – late Bolorian ,also in this study eleven microfacies were identified based on petrographic studies, which were assigned to the three paleoenvironmental: tidal flat, lagoon, and shoal. Diagenetic investigation leads to the identification of several diagenesis processes such as micritization, neomorphism (aggrading and degrading), cementation (syntaxial, epitaxial, drusy, poikilotopic, meniscus, pendant, equant and blocky), compaction ( mechanical and chemical), dissolution (fabric selective and non fabric selective), replacment (pyritization, silicification, and dolomitization). Based on the evidence of petrography, the Paragenetic sequence of the Lower Permian deposits in these two sections are interpreted in four environments, marine, metoric, burial, and uplift, and into three stages including: early diagenetic (eogenentic) and middle diagenetic (mesogenetic) and late diagenetic (telogenetic).