Magnetostratigraphic record of the early evolution of the southwestern Tian Shan foreland basin (Ulugqat area), interactions with Pamir indentation and India–Asia collision

Yang, Wei; Dupont‐Nivet, Guillaume; Jolivet, Marc; Guo, Zhaojie; Bougeois, Laurie; Bosboom, Roderic; Zhang, Ziya; Zhu, Bei; Heilbronn, Gloria

doi:10.1016/j.tecto.2015.01.003

Cited by 40 publications

(44 citation statements)

References 62 publications

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“…Jolivet et al, ) related to propagating deformation from the India‐Asia collision. More consensual is the onset of major exhumation well constrained around the Oligocene‐Miocene boundary (Sobel et al, ; van Hinsbergen et al, ; Yang et al, ). Before the early Miocene exhumation, the southwestern Tian Shan foreland remained mostly inactive through the Oligocene, as evidenced by limited exhumation, subsidence and accumulation (Heermance et al, ; Sobel et al, ; Yang et al, ).…”

Section: Geologic Settingmentioning

confidence: 99%

Paleogene evolution and demise of the proto‐Paratethys Sea in Central Asia (Tarim and Tajik basins): Role of intensified tectonic activity at ca. 41 Ma

et al. 2019

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The proto‐Paratethys Sea covered a vast area extending from the Mediterranean Tethys to the Tarim Basin in western China during Cretaceous and early Paleogene. Climate modelling and proxy studies suggest that Asian aridification has been governed by westerly moisture modulated by fluctuations of the proto‐Paratethys Sea. Transgressive and regressive episodes of the proto‐Paratethys Sea have been previously recognized but their timing, extent and depositional environments remain poorly constrained. This hampers understanding of their driving mechanisms (tectonic and/or eustatic) and their contribution to Asian aridification. Here, we present a new chronostratigraphic framework based on biostratigraphy and magnetostratigraphy as well as a detailed palaeoenvironmental analysis for the Paleogene proto‐Paratethys Sea incursions in the Tajik and Tarim basins. This enables us to identify the major drivers of marine fluctuations and their potential consequences on Asian aridification. A major regional restriction event, marked by the exceptionally thick (≤ 400 m) shelf evaporites is assigned a Danian‐Selandian age (ca. 63–59 Ma) in the Aertashi Formation. This is followed by the largest recorded proto‐Paratethys Sea incursion with a transgression estimated as early Thanetian (ca. 59–57 Ma) and a regression within the Ypresian (ca. 53–52 Ma), both within the Qimugen Formation. The transgression of the next incursion in the Kalatar and Wulagen formations is now constrained as early Lutetian (ca. 47–46 Ma), whereas its regression in the Bashibulake Formation is constrained as late Lutetian (ca. 41 Ma) and is associated with a drastic increase in both tectonic subsidence and basin infilling. The age of the final and least pronounced sea incursion restricted to the westernmost margin of the Tarim Basin is assigned as Bartonian–Priabonian (ca. 39.7–36.7 Ma). We interpret the long‐term westward retreat of the proto‐Paratethys Sea starting at ca. 41 Ma to be associated with far‐field tectonic effects of the Indo‐Asia collision and Pamir/Tibetan plateau uplift. Short‐term eustatic sea level transgressions are superimposed on this long‐term regression and seem coeval with the transgression events in the other northern Peri‐Tethyan sedimentary provinces for the 1st and 2nd sea incursions. However, the 3rd sea incursion is interpreted as related to tectonism. The transgressive and regressive intervals of the proto‐Paratethys Sea correlate well with the reported humid and arid phases, respectively in the Qaidam and Xining basins, thus demonstrating the role of the proto‐Paratethys Sea as an important moisture source for the Asian interior and its regression as a contributor to Asian aridification.

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Section: Geologic Settingmentioning

confidence: 99%

Paleogene evolution and demise of the proto‐Paratethys Sea in Central Asia (Tarim and Tajik basins): Role of intensified tectonic activity at ca. 41 Ma

et al. 2019

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“…Previous chronological and paleoclimatic studies have mainly focused on Cenozoic sedimentary sequences in the southwestern Tarim Basin, east of the Pamir Plateau. Magnetostratigraphic and paleontological work indicates that the ultimate retreat of the Paratethys from the Tarim Basin occurred during the late Eocene (e.g., Bosboom et al, 2014Bosboom et al, , 2017Sun et al, 2016;Sun & Jiang, 2013;Wang et al, 2014Wang et al, , 2016Yang et al, 2015). Low-temperature thermochronologic and sedimentological work revealed episodic erosional and tectonic activity of the Pamir-Tian Shan mountains in the Cenozoic (e.g., Sobel & Dumitru, 1997;Coutand et al, 2002;Robinson et al, 2007;Carrapa et al, 2014;Cao et al, 2014, Cao et al, 2015Blayney et al, 2016;Rutte et al, 2017;Liu et al, 2017); however, the timing and amplitude of the uplift events associated with these RESEARCH LETTER 10.1029/2019GL084838…”

Section: Introductionmentioning

confidence: 99%

Parathethys Last Gasp in Central Asia and Late Oligocene Accelerated Uplift of the Pamirs

Wang

Carrapa

Chapman

et al. 2019

Geophysical Research Letters

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Cenozoic sedimentary rocks in the Tajik Basin record the history of retreat of the Paratethys from central Asia, tectonic activity within the surrounding Pamir and Tian Shan mountains, and Asian aridification. However, there remains a paucity of precise chronological constraints on the sequences from this region. Here we present integrated magnetostratigraphic, detrital zircon and monazite U‐Pb geochronologic, and detrital apatite fission track thermochronologic data from the lower Cenozoic sedimentary sequences in the Tajik Basin. Our results indicate that the investigated sedimentary rocks were deposited between ~41 and 23.3 Ma, with a depositional hiatus between ~36 and 31 Ma. The last two marine regressions were dated at ~41 and ~37.4 Ma, respectively. Eolian sandy loess dominates the sequences from ~31 to ~25 Ma and gradually transitions to fluvial facies after ~25 Ma, consistent with late Oligocene to early Miocene acceleration of active deformation, uplift, and exhumation of the Pamirs.

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“…1), leaving the study of sedimentological records in the foreland regions of south WTS west to the TFF being rarely addressed. An exception of this is the magnetostratigraphic study conducted by Yang et al (2015), who dated the Miocene sediments but still left much space for the sediments to be more comprehensively dated. …”

Section: Introductionmentioning

confidence: 99%

Sedimentology and magnetostratigraphy of the Tierekesazi Cenozoic section in the foreland region of south West Tian Shan in Western China

Chen

Cheng

et al. 2015

Tectonophysics

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Magnetostratigraphic record of the early evolution of the southwestern Tian Shan foreland basin (Ulugqat area), interactions with Pamir indentation and India–Asia collision

Cited by 40 publications

References 62 publications

Paleogene evolution and demise of the proto‐Paratethys Sea in Central Asia (Tarim and Tajik basins): Role of intensified tectonic activity at ca. 41 Ma

Paleogene evolution and demise of the proto‐Paratethys Sea in Central Asia (Tarim and Tajik basins): Role of intensified tectonic activity at ca. 41 Ma

Parathethys Last Gasp in Central Asia and Late Oligocene Accelerated Uplift of the Pamirs

Sedimentology and magnetostratigraphy of the Tierekesazi Cenozoic section in the foreland region of south West Tian Shan in Western China

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