Lithostratigraphy and Biostratigraphy of Permian Deposits in the South of Sanandaj–Sirjan Metamorphic Belt, Western Kerman Province, Based on Foraminifera

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Document Type : Research Paper

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Department of Ecology, Institute of Sciences and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran

Abstract

This study investigates the lithostratigraphy and biostratigraphy of the Permian deposits in the west of Sirjan City, within the southern Sanandaj-Sirjan Metamorphic Belt. The measured section is bounded by faults at its base and top. The studied strata unconformably overlie metamorphosed Permian - Carboniferous sedimentary deposits and are overlain primarily by dolomitized and recrystallized Permian - Triassic metamorphic rcks. Fourteen lithostratigraphic units were identified, their characteristics shaped by both original sedimentary basin fluctuations and post-diagenetic metamorphism. The microfossil assemblage is notably distinct from those of adjacent structural zones, comprising 11 fusulinid and 29 smaller foraminifera species. This unique fauna suggests that during the Permian, the Sanandaj-Sirjan metamorphic belt constituted an independent basin situated on the northern margin of the Neo-Tethys Ocean and the southern margin of the Cimmerian Superterrane. Based on the identified smaller foraminifera and fusulinids, the age of the studied section is constrained to the Bolorian through Murgabian (Middle to Late Permian).

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Journal of Stratigraphy and Sedimentology Researches

Articles in Press, Accepted Manuscript
Available Online from 06 June 2026

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