A Late Miocene Terrestrial Temperature History for the Northeastern Tibetan Plateau's Period of Tectonic Expansion

Chen, Chihao; Bai, Yan; Fang, Xiaomin; Guo, Haichao; Meng, Qingquan; Zhang, Weilin; Zhou, Pengchao; Murodov, Azamdzhon

doi:10.1029/2019gl082805

Cited by 54 publications

(28 citation statements)

References 117 publications

(246 reference statements)

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“…The relative abundance of Ⅲc and Ⅲc' detected in each sample is low. In comparison with previous results (De Jonge et al, 2014b;Chen et al, 2019;Wang and Liu, 2021), the Qilian Shan surface soils are located at the end of low tetramethylation.…”

Section: Resultssupporting

confidence: 42%

Correlation Between brGDGTs Distribution and Elevation From the Eastern Qilian Shan

et al. 2022

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A clear understanding of the uplift history of the Tibetan Plateau is the key for correctly understanding its uplift mechanisms and impacts on the Asian environment. However, consensus has not been reached regarding the uplift history of the Tibetan Plateau, especially because of lack of well-calibrated paleoaltimetry proxies and lack of knowledge of how to correctly apply them to the past. Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are a promising paleoaltimetry proxy because these large molecules tend to get preserved in sediments, and this proxy has a clear relationship with mean annual air temperature (MAAT), circumventing convoluted impact of precipitation or isotope variations on isotope-based paleoaltimetry proxies. As a result, many calibrations have been carried out linking brGDGTs with paleoelevation. Qilian Shan of the northeastern Tibetan Plateau is a key place testing previous models regarding the uplift model of the Tibetan Plateau. However, no modern calibration equation linking brGDGTs with MAAT is available. Here, we presented the first calibration equation between brGDGTs and MAAT from the eastern Qilian Shan with an elevation ranging from 2,055 to 3,300 m [MAAT = −15.50 + 49.55 × MBT′5ME (R2 = 0.89, p < 0.001, RMSE = 1.07°C)]. We further established the calibration between MBT′5ME-derived MAAT and elevation. This dataset lays the foundation to understand the uplift history and environmental variations of the northeastern Tibetan Plateau area.

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Section: Resultssupporting

confidence: 42%

Correlation Between brGDGTs Distribution and Elevation From the Eastern Qilian Shan

et al. 2022

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“…Scattered early Cenozoic deformation may represent reactivation of preexisting faults in response to the India-Eurasia collision. Widespread middle-late Miocene deformation may build high topography of the Qilian Shan when taking significant middlelate Miocene shifts on provenance, sedimentary facies and climate proxies in surrounding basins into consideration (this study; Bao et al, 2019;Bovet et al, 2009;Chen, Bai, et al, 2019;Cheng et al, 2016;Cheng, Garzione, Mitra, et al, 2019;Dettman et al, 2003;Nie et al, 2017;Wang et al, 2003;Zhuang, Hourigan, Koch, et al, 2011). Such a growth scenario seems to be incompatible with the oblique subduction model (Tapponnier et al, 2001), which predicts that shortening in the NE Tibetan Plateau related to the India-Eurasia convergence occurred in the Pio-Quaternary and then propagated northward in steps.…”

Section: Constraints On the Development Of The Northeastern Tibetan Plateaumentioning

confidence: 89%

Topographic growth of the northeastern Tibetan Plateau during the middle‐late Miocene: Insights from integrated provenance analysis in the NE Qaidam Basin

Zheng

Zhou

et al. 2021

Basin Research

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The development history of high topography in the northeastern (NE) Tibetan Plateau is essential to test various plateau growth models and understand plateau construction. We present integrated provenance data from the NE Qaidam Basin, south of the Qilian Shan. Results show an increase in carbonate lithics, an increase in Al 2 O 3 /SiO 2 ratios, a negative shift in ε Nd values and an appearance of large amounts of Precambrian zircon grains in the period of ca. 13-8 Ma, arguing that the sediment source of the NE Qaidam Basin may have shifted from the East Kunlun Shan to the Qilian Shan during this time interval. We infer that significant topographic growth of the southern Qilian Shan occurred during the middle-late Miocene. Along with widespread middle to late Miocene deformation records across the Qilian Shan and abruptly shifts on provenance, sedimentary facies and climate indexes in its surrounding basins, present high topography of the NE Tibetan Plateau may have been established since the middle-late Miocene.

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“…The Asian winter monsoon has appeared in some form since about 13.1 Mya (M. Fan, Song, Dettman, Fang, & Xu, 2006). Rising vapour from the Indian Ocean cools, condenses and precipitates before it crosses the Tibetan Plateau, which results in drier air advancing to the northern plateau (Fang et al, 2019;Favre et al, 2015;Ge, 2006; J. X. Li et al, 2018).…”

Section: Discussion 1 Demographymentioning

confidence: 99%

“…Li et al, 2018). The combination of mountains and monsoons makes the climate in north-western China drier and the aridity reached its maximum approximately 9.6-8.0 Mya (C. Chen et al, 2019;M. Fan, Dettman, Song, Fang, & Garzione, 2007;Mertz-Kraus, Brachert, Jochum, Reuter, & Stoll, 2009;Zhisheng et al, 2001).…”

Section: Discussion 1 Demographymentioning

confidence: 99%

Barriers to gene flow play an important role in the speciation of two closely related Populus (Salicaceae) species

Tian

Ingvarsson

Zhao

et al. 2020

Preprint

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Despite the growing number of recent studies on genome-wide divergence during speciation, the genetic basis and mechanisms of genomic divergence and speciation are still incompletely understood. In most species, natural selection plays a key role in genomic heterogeneous divergence. Additionally, barriers to gene flow, such as chromosomal rearrangements or gene incompatibilities, can also cause genome heterogeneity and speciation. Based on whole genome re-sequencing data from 27 Populus alba and 28 P. adenopoda individuals, we explored the reasons for the heterogeneous differentiation of genomes of these two closely related species. The results showed that the two species diverged˜5-10 million years ago (Mya), when the Qinghai-Tibet Plateau reached a certain height and the inland climate of the Asian continent became arid, which caused the two species begin to diverge and eventually led to speciation. In highly differentiated regions, neutrality tests (Tajima's D and Fay & Wu's H) of these regions revealed no difference while the absolute divergence (dxy) were significantly higher than genome background, which indicates that barriers to gene flow rather than natural selection played a major role in maintaining genomic heterogeneous divergence and reproductive isolation, which is the most important condition for speciation. We further found that some genes related to reproduction may be involved in explaining the reproductive isolation of the two species.

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A Late Miocene Terrestrial Temperature History for the Northeastern Tibetan Plateau's Period of Tectonic Expansion

Cited by 54 publications

References 117 publications

Correlation Between brGDGTs Distribution and Elevation From the Eastern Qilian Shan

Correlation Between brGDGTs Distribution and Elevation From the Eastern Qilian Shan

Topographic growth of the northeastern Tibetan Plateau during the middle‐late Miocene: Insights from integrated provenance analysis in the NE Qaidam Basin

Barriers to gene flow play an important role in the speciation of two closely related Populus (Salicaceae) species

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