Sedimentary facies, depositional environment, and sequence stratigraphy of Oligocene–Miocene shallow water carbonate from the Rig Mountain, Zagros basin (SW Iran)

This study investigates the depositional environment and sequence stratigraphy of the Asmari Formation that is exposed at the Rig anticline in the Izeh zone of the Zagros foreland basin with a thickness of 374 m as a sequence of thin, medium, thick, and massive carbonate rocks. The Asmari Formation...

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Bibliographic Details
Published in:Carbonates and evaporites 2016-03, Vol.31 (1), p.69-85
Main Authors: Adabi, Mohammad H., Kakemem, Umid, Sadeghi, Abbas
Format: Article
Language:English
Subjects:
Age
Anticlines
Benthos
Carbonate rocks
Carbonates
Earth and Environmental Science
Earth Sciences
Foraminifera
Geological time
Geology
Lagoons
Mineral Resources
Mineralogy
Miocene
Mountains
Oligocene
Original Article
Sedimentary facies
Sedimentation
Sequence stratigraphy
Sequences
Sequencing
Shallow water
Shoals
Stratigraphy
Tidal flats
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Summary:This study investigates the depositional environment and sequence stratigraphy of the Asmari Formation that is exposed at the Rig anticline in the Izeh zone of the Zagros foreland basin with a thickness of 374 m as a sequence of thin, medium, thick, and massive carbonate rocks. The Asmari Formation is Oligocene–Early Miocene (Burdigalian) in age at the study area. In this area 12 microfacies are distinguished on the basis of their depositional texture, petrographic analysis, and fauna. These facies deposited in four major depositional environment including tidal flat, lagoon, shoal, and basin. The Asmari Formation represents sedimentation on a homoclinal carbonate ramp system. Based on the microfacies analysis, sequence stratigraphic studies, and distribution of planktonic and benthic foraminifera, six third-order sequences, three in Oligocene (Rupelian, Early Chattian, and Late Chattian in age) and three in Miocene (Early Aquitanian, Late Aquitanian, and Early Burdigalian in age), in Rig mountain section were identified.
ISSN:0891-2556
1878-5212
DOI:10.1007/s13146-015-0242-9