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Magnetostratigraphic Age Control of the Timing of Tectonic Deformation and the Shifting Depositional Environments in the Dezful Embayment, Iran
Sun, Jimin1,2; Sheykh, Morteza3; Windley, Brian F.4; Talebian, Morteza5; Cao, Mengmeng1; Ahmadi, Nahid3; Sha, Jingeng(沙金庚)6
2022
Source PublicationTECTONICS
ISSN0278-7407
Volume41Issue:1Pages:22
Abstract

The timing of tectonic deformation in the Zagros foreland basin provides important information about the tectonic propagation process driven by the Arabia-Eurasia convergence. The chronology of growth strata is one of the most important methods to delimit the history of folding and thrusting within the foreland basin. In this study, we report integrated analyses of sedimentology, magnetostratigraphy, and biostratigraphy of Miocene strata in the Dezful Embayment in the SW Zagros foreland basin. The new results indicate that deposition of the northern limb of the Gach-e Moh Anticline was between 14.6 and 8.6 Ma; that includes the Upper Gachsaran Formation (14.6-13.8 Ma), the Mishan Formation (13.8-12.8 Ma), and the Agha Jari Formation (12.8-8.6 Ma). Based on magnetostratigraphic and sedimentary evidence, the transition from marine to non-marine was at similar to 12.8 Ma. Analysis of temporal lithofacies-stacked patterns shows there were seventeen transgression-regression cycles during the Middle Miocene Climatic Transition with a similar to 100-Kyr Earth eccentricity cycle, suggesting that the cyclic marine transgressions and regressions were mainly driven by eustatic sea level fluctuations; but tectonic-induced basin subsidence also contributed marine transgressions in the Upper Mishan Formation. The final seawater retreat was at 12.8 Ma driven by both the global eustatic sea level drop and the enhanced south-westward progradation of sediments eroded from the High Zagros. The base of the growth strata in the footwall of the Mountain Front Fault was at similar to 11 Ma, suggesting that tectonic deformation caused by the Arabia-Eurasia collision had propagated to the Dezful Embayment by that time.

KeywordZagros fault thrust belt growth folding Neogene eustasy
DOI10.1029/2021TC006881
Indexed BySCI
Language英语
WOS KeywordARABIA-EURASIA COLLISION ; FORELAND-BASIN ; ISOTOPE STRATIGRAPHY ; FACIES MODELS ; CARBON-CYCLE ; THRUST BELT ; ZAGROS ; MIOCENE ; OLIGOCENE ; CLOSURE
Funding ProjectNational Natural Science Foundation of China[41888101] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20070202]
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000751221200007
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
PublisherAMER GEOPHYSICAL UNION
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/40427
Collection中国科学院南京地质古生物研究所
Corresponding AuthorSun, Jimin
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Geol Survey Iran, Appl Res Ctr, Tehran, Iran
4.Univ Leicester, Sch Geog Geol & Environm, Leicester, Leics, England
5.Geol Survey Iran, Res Inst Earth Sci, Tehran, Iran
6.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
Recommended Citation
GB/T 7714
Sun, Jimin,Sheykh, Morteza,Windley, Brian F.,et al. Magnetostratigraphic Age Control of the Timing of Tectonic Deformation and the Shifting Depositional Environments in the Dezful Embayment, Iran[J]. TECTONICS,2022,41(1):22.
APA Sun, Jimin.,Sheykh, Morteza.,Windley, Brian F..,Talebian, Morteza.,Cao, Mengmeng.,...&Sha, Jingeng.(2022).Magnetostratigraphic Age Control of the Timing of Tectonic Deformation and the Shifting Depositional Environments in the Dezful Embayment, Iran.TECTONICS,41(1),22.
MLA Sun, Jimin,et al."Magnetostratigraphic Age Control of the Timing of Tectonic Deformation and the Shifting Depositional Environments in the Dezful Embayment, Iran".TECTONICS 41.1(2022):22.
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