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Controls on the sequence stratigraphic architecture of the Neogene Zagros foreland basin

Pirouz, Mortaza and Simpson, Guy and Castelttort, Sebastien and Gorin, Georges and Bahroudi, Abbas (2016) Controls on the sequence stratigraphic architecture of the Neogene Zagros foreland basin. In: Tectonic evolution, collision, and seismicity of southwest Asia : in honor Manuel Berberian's forty-five years of research contributions. Special papers (Geological Society of America). No.525. Geological Society of America , Boulder, CO, pp. 399-421. ISBN 9780813725253.

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We investigated the sequence stratigraphic architecture of Neogene deposits in the Zagros region using 12 measured stratigraphic sections and performing strontium isotope measurements on 10 samples. We combined our data with 44 previous published Sr isotope measurements and five paleomagnetostratigraphic sections in order to place the foreland deposits in a chronostratigraphic framework. Two chronostratigraphic charts were created, and transgressive-regressive system tracts were identified in the western and eastern sectors of the Zagros. These results show that the southward migration of the Zagros fold-and-thrust belt led to broadly upward-coarsening, progradational sequences due to progressive uplift and seaward (southwestward) migration of the Zagros fold-and-thrust belt. In addition, we show distinct differences in the sequences between the eastern and western sectors. It can be inferred that, in the strike-parallel direction, the Zagros foreland basin did not respond in a simple manner to tectonics and global sea-level changes during the Neogene. The different architecture of the sequences and mismatch of Neogene sedimentary architecture with global sea-level curves imply different orogen-parallel evolutionary histories and strong impact of tectonics on the basin evolution as compared to eustasy. Finally, we present evidence for a retrogradational sequence related to a period of enhanced deformation and related crustal thickening during the middle Miocene in the eastern Zagros.

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Pirouz, Mortaza0000-0002-7569-492X
Additional Information:© 2016 Geological Society of America. Accepted 15 June 2016. First published online December 20, 2016. This study was supported by the Swiss National Science Foundation (grant P2GEP2-148801). We thank Mohammad Fakhari, Rasoul Sorkhabi, and two anonymous reviewers for their thorough reviews and highly appreciate their comments and suggestions, which significantly contributed to improving the quality of the paper. We also thank Jean-Philippe Avouac, Jamshid Hassanzadeh, and Seyed Abolfazl Hosseini for discussions. This research paper is lovingly dedicated to those who are fighting cancer or who have survived it.
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)P2GEP2-148801
Series Name:Special papers (Geological Society of America)
Issue or Number:525
Record Number:CaltechAUTHORS:20170509-125037614
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Official Citation:Mortaza Pirouz, Guy Simpson, Sebastien Castelltort, Georges Gorin, Abbas Bahroudi, 2017. "Controls on the sequence stratigraphic architecture of the Neogene Zagros foreland basin", Tectonic Evolution, Collision, and Seismicity of Southwest Asia: In Honor of Manuel Berberian’s Forty-Five Years of Research Contributions, Rasoul Sorkhabi
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77303
Deposited By: Tony Diaz
Deposited On:12 May 2017 23:02
Last Modified:15 Nov 2021 17:29

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