Magnetostratigraphy of the Fenghuoshan Group in the Hoh Xil Basin and its tectonic implications for India–Eurasia collision and Tibetan Plateau deformation

Jin, Chunsheng; Liu, Qingsong; Liang, Wei; Roberts, Andrew P.; Sun, Jimin; Hu, Pengxiang; Zhao, Xiangyu; Su, Youliang; Jiang, Zhaoxia; Liu, Zhifeng; Duan, Zhibang; Yang, Huihui; Shen, Yuan

doi:10.1016/j.epsl.2018.01.010

Cited by 66 publications

(52 citation statements)

References 47 publications

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“…However, the age of the Fenghuoshan Group is suggested to range from ca. 72 to 51 Ma with the most recent magnetostratigraphic analyses (Jin et al, 2018). Fossil assemblages further establish an Eocene age for the Fenghuoshan Group (Smith and Xu, 1988).…”

Section: Cenozoic Hoh Xil Basinmentioning

confidence: 53%

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Mesozoic-Cenozoic evolution of the Eastern Kunlun Range, central Tibet, and implications for basin evolution during the Indo-Asian collision

Zuza

Zhou

et al. 2019

Lithosphere

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The present-day Tibetan plateau, which is the largest highland on Earth, formed primarily due to the India-Asia collision since 50–60 Ma. The development of the plateau has been associated with the Cenozoic development of two large intra-plateau sedimentary basins in north-central Tibet: the Qaidam and Hoh Xil basins to the north and south of the Eastern Kunlun Range, respectively. We conducted an integrated study of these two basins and the Eastern Kunlun Range that separates them to understand the timing and mechanisms of their development in order to decipher the growth and uplift history of the plateau. Crustal shortening in the Fenghuoshan-Nangqian and Qilian Shan-Nan Shan thrust belts initiated no later than the early Eocene, which formed the northern and southern boundaries of the combined Hoh Xil and Qaidam basins in central Tibet. The distinct two-stage development of the Hoh Xil basin suggests emergence of a topographic barrier between the Hoh Xil basin in the south and Qaidam basin in the north in the early Neogene, which is supported by the existing and new apatite fission-track data from the Eastern Kunlun Range that suggest rapid cooling after ca. 20 Ma. Previous and newly collected geochronological, petrological, and thermochronological data are best interpreted in the context of the Paleogene Paleo-Qaidam hypothesis, which requires Hoh Xil and Qaidam basins to have been parts of a single integrated basin during the early stage of the Cenozoic Tibetan plateau development.

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Section: Cenozoic Hoh Xil Basinmentioning

confidence: 53%

“…Recently, a tuff layer within the Fenghuoshan Group yielded a weighted mean U-Pb age of ca. 63 Ma (Jin et al, 2018). The Fenghuoshan Group was sourced from the Qiangtang terrane, and may share a sediment source with Cretaceous sedimentary rocks in the Nima Basin (Staisch et al, 2014).…”

Section: Cenozoic Hoh Xil Basinmentioning

confidence: 99%

Mesozoic-Cenozoic evolution of the Eastern Kunlun Range, central Tibet, and implications for basin evolution during the Indo-Asian collision

Zuza

Zhou

et al. 2019

Lithosphere

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“…Unfortunately, major tectonic activity in this particular area and time period remains insufficiently constrained to couple specific tectonic activity to this regression. The timing of the regression may have roughly coincided with the initial early Eocene Indo-Asia collision and it has been previously speculated that its far-field deformation may have propagated to the northern part of the proto-Tibetan plateau at this time (Clark et al, 2010;Dayem et al, 2009;Jin et al, 2018;Jolivet et al, 2001Jolivet et al, , 2013 despite the ca. 3,000 km of separation (Dupont-Nivet et al, 2010).…”

Section: St Sea Incursion (Ca 59 Ma To 53-52 Ma)mentioning

confidence: 93%

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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“…The Indo-Asian collision took place at ca. 60-50 Ma, triggering the uplift of the Tibetan Plateau Hu et al, 2015;Jin et al, 2018;Sun et al, 2016;Zhu et al, 2015). However, the pre-plateau history of the Lhasa terrane, especially the evolutionary history of the Neotethyan Ocean, remains enigmatic (Li et al, 2010;Zhu et al, 2010).…”

Section: ■ Introductionmentioning

confidence: 99%

Identification of a new source for the Triassic Langjiexue Group: Evidence from a gabbro-diorite complex in the Gangdese magmatic belt and zircon microstructures from sandstones in the Tethyan Himalaya, southern Tibet

Zhao

et al. 2019

Geosphere

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Considerable debate persists as to the Triassic paleogeographic framework of the Neotethys and the origin of the Late Triassic Langjiexue Group in the Tethyan Himalaya. Triassic magmatic rocks in the Gangdese belt and Late Triassic Langjiexue sediments play a pivotal role in addressing these issues. Geochronological, petrological, and geochemical analyses have been performed on the Middle Triassic gabbro-diorite complex (with crystallization ages of ca. 244–238 Ma) from the Gangdese belt. These plutonic rocks are characterized by relatively low MgO and high Al2O3 contents, calc-alkaline trends, and depletion of Nb, Ta, and Ti, resembling low-MgO high-alumina basalts or basaltic andesites. These plutonic rocks exhibit depleted whole-rock εNd(t) values of ∼+5 and zircon εHf(t) values peaking at ∼+14. These features resemble those of rocks in a subduction-related arc setting. We also completed detrital zircon U-Pb dating and microstructure analysis for the sandstones of the Langjiexue Group in the Tethyan Himalaya. Zircon grains with ages >300 Ma are dominated by preweathered and weathered surfaces as well as fairly rounded to completely rounded scales, indicating a high degree of polycyclicity. In contrast, 300–200 Ma ones are characterized by fresh surfaces and completely unrounded to poorly rounded scales, indicating nearby sources. Collectively, our data, combined with published results, support that the subduction initiation of the Neotethys began no later than the Middle Triassic. Arc-affinity magmatic rocks supplied some materials to the Langjiexue Group. This scenario sheds new light on the provenance of the Langjiexue Group and the Triassic paleogeography of the Neotethyan realm.

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Magnetostratigraphy of the Fenghuoshan Group in the Hoh Xil Basin and its tectonic implications for India–Eurasia collision and Tibetan Plateau deformation

Cited by 66 publications

References 47 publications

Mesozoic-Cenozoic evolution of the Eastern Kunlun Range, central Tibet, and implications for basin evolution during the Indo-Asian collision

Mesozoic-Cenozoic evolution of the Eastern Kunlun Range, central Tibet, and implications for basin evolution during the Indo-Asian collision

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

Identification of a new source for the Triassic Langjiexue Group: Evidence from a gabbro-diorite complex in the Gangdese magmatic belt and zircon microstructures from sandstones in the Tethyan Himalaya, southern Tibet

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