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Depositional environment of the Bagh-e-Vang Formation – the only occurrence of upper Lower Permian in Iran

Yegane Bizhan Yousefi, Van Loon A.J. (Tom), Fard Sakine Arefi, Farahpour Mohammad Mehdi, Sharahi Safoora Yasbolaghi

Geologos

2021

Vol. 27, No. 1

1--14

A transgression of the Tethys Ocean occurred in east central Iran, like in other areas of the Tethys Ocean, around the Yakhtashian/Bolorian (regional chronostratigraphical units corresponding with the Artinskian/Kungurian of the Early Permian) transition. This led to the development of a carbonate platform that is represented in the Shirgesht area on the northern part of the Tabas Block by the Bagh-e-Vang Formation, which constitutes the only known sedimentary unit from the late Early Permian in Iran. Field data and thin-section analysis indicate deposition on a carbonate ramp with barriers separating a lagoonal area with intertidal mud flats from the open-marine environment. The overall transgres-sive development is indicated by the presence of open-marine sediments on top of the barrier and lagoonal sediments.