Cosmogenic nuclide burial dating of an alluvial conglomerate sequence: An example from the Hexi Corridor, NE Tibetan Plateau

Zhao, Zhijun; Granger, Darryl E.; Chen, Ye; Shu, Qiang; Liu, Guofei; Zhang, Maoheng; Hu, Xiaofei; Wu, Qili; Hu, Erya; Liu, Ying; Yan, Yichao; Qiao, Lingling

doi:10.1016/j.quageo.2017.02.007

Cited by 34 publications

(20 citation statements)

References 51 publications

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“…The evidence noted earlier, combined with previous studies, implies that: (a) the ATF has a complicated surface geomorphology in its eastern segment, associated with limited relief related to restraining bends (this study); (b) the ATF forms a crustal or even upper crustal‐scale discontinuity in its eastern segment (Xiao et al., 2015); (c) the along‐strike slip rates decrease continuously eastward to the easternmost limit of the eastern segment of the ATF (e.g. Cheng et al., 2019; Zhang et al., 2007; Zheng et al., 2013); (d) the upper crustal deformation of the easternmost of the ATF terminates somewhere between the C‐C’ and D‐D’ sections, as demonstrated by the structural style changing eastwards from transpression‐induced positive flower structures to compression‐related thrusts and folds (Figure 1b; this study); (e) horizontal shortening magnitudes driven by transpressional deformation in the upper crust during the Cenozoic are limited to less than ~5.3 km along the easternmost ATF (this study); and (f) strike‐slip displacement in the easternmost ATF began at ~1.2–0.7 Ma (this study; Chen et al., 2006; Zhao et al., 2017).…”

Section: Implications For the Growth Of The Tibetan Plateaumentioning

confidence: 61%

“…As noted above, the angular unconformity between the Jiuquan and Yumen formations or older strata is widespread in the seismic profiles (Figures 2–5), consistent with the one between the Jiuquan and Shulehe formations observed in the outcrop of the Hongliuxia section (Figure 6). Previous dating suggests an age of ~1.2–0.7 Ma for the boundary between the Yumen and overlying Jiuquan formations (Chen et al., 2006; Fang et al., 2005; Shi et al., 2001; Wang et al., 2016; Zhao et al., 2017), indicating that transpressional deformation along the easternmost ATF occurred at this time (Figure 6).…”

Section: Deformation Timingmentioning

confidence: 81%

“…Field photograph of the angular unconformity between the Jiuquan and Shulehe formations in the Hongliuxia Section, with an age of ~1.2–0.7 Ma constrained by published chronological results (Chen et al., 2006; Fang et al., 2005; Shi et al., 2001; Zhao et al., 2017). The location of the photography is shown in the A‐A’ section in Figure 2…”

Section: Deformation Timingmentioning

confidence: 99%

“…An et al., 2018). Chronologies of the Cenozoic strata have been constrained by magnetostratigraphy in combination with cosmogenic nuclide burial and electron spin resonance dating with the latter two constraints coming from Laojunmiao section, suggesting ~40.2 to ~<33.4 Ma for the Huoshaogou Formation, ~>22.4 to ~17 Ma for the Baiyanghe Formation, ~17 to ~5 Ma for the Shulehe Formation, ~<5 to ~1.2 Ma for the Yumen Formation, ~0.7 to 0.15 Ma for the Jiuquan Formation and <0.15 Ma for the Gobi Formation (Figure 1c; An et al., 2018; Chen et al., 2006; Fang et al., 2005; Shi, Ye, Zhao, Fang, & Li, 2001; Wang et al., 2016; Zhao et al., 2017).…”

Section: Geological Settingmentioning

confidence: 99%

“…DDSF, Dengdeng Shan Fault; HSF, Hei Shan Fault; JYGF, Jiayuguan Fault; YWSF, Yinwashan Fault; XMBF, Xinminbao Fault; YMF, Yumen Fault. (c) Stratigraphic division adopted in this study, with the age constraints of the Cenozoic strata compiled from Shi et al., 2001; Fang et al., 2005; Chen et al., 2006; Wang et al., 2016; Zhao et al., 2017; and An et al., 2018. (d) Competing tectonic models on the easternmost ATF.…”

Section: Introductionmentioning

confidence: 99%

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Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles

Zhang

Cheng

et al. 2020

Terra Nova

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The Altyn Tagh Fault (ATF) serves as a key continental‐scale controlling structural element of the Tibetan Plateau. However, its eastward extent remains controversial. Here we use high‐resolution seismic reflection profiles to investigate the subsurface structures of the easternmost ATF and use these to delimit the easternmost extent of the fault. The structural analyses show an eastward geometric change from transpressional positive flower structures to compressional thrusts, with transpression‐induced shortening magnitudes decreasing eastwards from a maximum of ~5.3 km to being absent. Stratigraphic controls indicate that the deformation took place over the last ~<1.2 Ma. Our wider findings lead us to: (a) reject the suggestion that the ATF previously extended beyond the Kuantan Shan‐Hei Shan to link with the Alxa‐East Mongolia Fault; and (b) propose that the rigid block model used to describe the Tibetan Plateau crust is not consistent with the extent and structural details of the easternmost ATF.

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Section: Implications For the Growth Of The Tibetan Plateaumentioning

confidence: 61%

Section: Deformation Timingmentioning

confidence: 81%

Section: Deformation Timingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles

Zhang

Cheng

et al. 2020

Terra Nova

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Yumen conglomerate ages in the South Ningxia Basin, north‐eastern Tibetan Plateau, as constrained by cosmogenic dating

Shi

Chen

et al. 2019

Geological Journal

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The South Ningxia Basin, as the outermost Cenozoic basin on the north‐eastern margin of the Tibetan Plateau, is characterized by a series of convex to the north‐east arcuate structural belts. Constraining the final formation time of the belt has been an ongoing focus in geologic research of the Tibetan Plateau. A set of early Pleistocene conglomerates, the Yumen conglomerate, overlying the folded pre‐Quaternary formations are widely distributed throughout the whole basin, and the latest folded formation is the upper Pliocene Ganhegou Formation, marking the termination of folding uplift in the north‐eastern Tibetan Plateau. Based on 1:50,000 geological mapping, a set of early Pleistocene alluvial fan conglomerates overlying the folded Palaeogene–Neogene strata were recognized and agree well with the Yumen conglomerate. Here, the Yumen conglomerate formation ages were determined to be 0.6–1.04 Ma using cosmic nuclide burial dating. Combined with the upper limit age of the latest strata beneath the unconformity with the latest palaeomagnetic age of 2.77 Ma, the crustal shortening event is restricted to the period 2.77–1.04 Ma, indicating that it is the most intense tectonic shortening event along the north‐eastern margin of the Tibetan Plateau.

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Quaternary integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Wang,

Zheng,

Ling

et al. 2024

Sci. China Earth Sci.

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The Quaternary strata on the Qinghai-Tibet Plateau contain rich information about the paleoclimate and environmental evolution, record the evolution process of the Quaternary regional tectonics, paleogeography, and geomorphology of the plateau, and are extremely important areas for studying the Quaternary geological events and regional environmental evolution. According to a comprehensive analysis of the regional stratigraphic data and the development and evolution characteristics of the biota, based on the differences in the lithostratigraphic units, sedimentary characteristics, landforms, and drainage systems, the Quaternary strata on the Qinghai-Tibet Plateau and its surrounding areas are divided into five stratigraphic regions: the Tarim region, Loess Plateau region, Qinghai-Tibet Plateau region, Yunnan-Guizhou Plateau region, and India-Ganges region. The Qinghai-Tibet Plateau stratigraphic region is divided into seven stratigraphic sub-regions: the West Kunlun-Karakorum, Altun-Qilian Mountains, Qaidam-Hehuang, East Kunlun-Bayan Har, Qiangtang, East Xizang-West Yunnan-West Sichuan, and Gangdise-Himalayan sub-regions. This paper briefly describes the lithostratigraphic units of the seven stratigraphic sub-regions of the Qinghai-Tibet Plateau. According to the lithostratigraphic sequence and its sedimentary characteristics, stratigraphic contact relationship, formation age, and evolution of the biota in each stratigraphic sub-region, the Quaternary tectonic paleogeographic evolution of the Qinghai-Tibet Plateau is divided into four stages. (1) The inherited differential uplift stage since the Pliocene (2.6-1.8/1.5 Ma): the regional sedimentary differences were significant, and the stratigraphic distribution was limited, the alluvial-proluvial sandy conglomerate was widely developed along the piedmont, and fluvial and lacustrine deposits were developed in the low-lying areas between the mountains. (2) The mountain range flattening stage (1.8/1.5-1.2/0.8 Ma): the erosion unconformity surfaces around the plateau were widely distributed, large rivers were formed, and lake sediments developed in the intermountain basins and the hinterland of the plateau. (3) 1.2/0.8-0.128 Ma: the plateau continued to rise in a large range, with significant topographic differences and intensified mountain erosion. At about 0.8 Ma, the plateau uplifted above the snow line and entered the cryosphere, mountain glaciers developed, and the alpine arid environment gradually formed. (4) 0.128 Ma-: the mountains rose and erosion intensified, and intermountain basins and lakes were widely distributed. There were significant differences in the regional sedimentary characteristics, and the sedimentary types developed toward diversification. The modern plateau landform pattern was basically formed.

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Cosmogenic nuclide burial dating of an alluvial conglomerate sequence: An example from the Hexi Corridor, NE Tibetan Plateau

Cited by 34 publications

References 51 publications

Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles

Delimiting the eastern extent of the Altyn Tagh Fault: Insights from structural analyses of seismic reflection profiles

Yumen conglomerate ages in the South Ningxia Basin, north‐eastern Tibetan Plateau, as constrained by cosmogenic dating

Quaternary integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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