Electrical structure of the middle Qilian Shan revealed by 3-D inversion of magnetotelluric data: New insights into the growth and deformation in the Northeastern Tibetan Plateau

Liang, Hongda; Gao, Rui; Xue, Shuai; Han, Jiangtao

doi:10.1016/j.tecto.2020.228523

Cited by 11 publications

(2 citation statements)

References 46 publications

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“…In an MT transect east of the Jinta'Nanshan, a low resistivity zone was identified under the Helishan fault (HLSF), separating the high resistivity bodies beneath the Qilian Shan and Alxa Block (Liang et al, 2020), and was interpreted as the HLSF with Alxa Block lithosphere underthrusting southward along this south-dipping resistivity gradient. However, the MT measurements of Xiao et al (2013) support an interpretation of a northdipping shallow fault for the HLSF.…”

Section: Discussionmentioning

confidence: 99%

New Magnetotelluric Data Reveal Deep Fault Boundaries and Contrasting Late Cenozoic Fault Kinematics Between the Qilian Shan Thrust Wedge and Beishan‐Alxa Block, Western China

Yang,

Sun,

Zhan

et al. 2024

Geophysical Research Letters

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The structural connectivity and kinematic relationship between the Altyn Tagh sinistral strike‐slip fault (ATF) and Qilian Shan fold‐and‐thrust belt along the north Tibetan margin east of 96°E is an important question for tectonicists interested in the evolving active deformation field of Central Asia and associated earthquake hazards of China's Hexi Corridor region. New results from a detailed 130‐km‐long N‐S magnetotelluric (MT) survey from the Qilian Shan to Beishan elucidates the locations and down‐dip orientations of major faults. Importantly, the results indicate that the Heishan‐Jinta’Nanshan fault system roots steeply into the lower crust, is unconnected to the Qilian Shan thrust wedge, and has reactivated the margin of the North China Craton and an older, regional ductile shear belt. The structurally linked ATF‐Heishan‐Jinta’Nanshan system defines a fundamental kinematic boundary in central Asia between the NE directed Qilian Shan thrust belt to the south and the eastwardly extruding Beishan‐Alxa Block to the north.

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Section: Discussionmentioning

confidence: 99%

New Magnetotelluric Data Reveal Deep Fault Boundaries and Contrasting Late Cenozoic Fault Kinematics Between the Qilian Shan Thrust Wedge and Beishan‐Alxa Block, Western China

Yang,

Sun,

Zhan

et al. 2024

Geophysical Research Letters

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“…Some studies have focused on both long and short-term landscape evolution of the Qilian Shan, from which, the results on the onset of mountain building (Dai et al, 2006;He et al, 2020;Lease, 2014;Lease, Burbank, Gehrels, Wang, & Yuan, 2007;Li et al, 2020), the extension model of the orogeny (Lease et al, 2007;Lease, Burbank, Zhang, Liu, & Yuan, 2012;Pang et al, 2019;Zheng et al, 2013;Zheng et al, 2017), and the erosion pattern under the influence of tectonics and climate (Hetzel et al, 2004;Hu, Fang, Zhao, & Darryl, 2015;Palumbo, Hetzel, Tao, & Li, 2010;Palumbo, Hetzel, Tao, & Li, 2011;Zheng, Clark, Zhang, Zheng, & Farley, 2010), have been achieved. In addition, the regional deep structures have been finely explored by means of the high-resolution deep seismic-reflection data (Gao et al, 2013;Guo et al, 2016;Huang, Xu, Gao, Guo, & Li, 2020;Wang et al, 2014) and the magnetotelluric imaging (Liang, Gao, Xue, & Han, 2020;Zhan et al, 2008;Zhao et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Geomorphic expression of the Lenglong Ling area, eastern Qilian Shan, and its coupling relationship with the deep structures

Hong³

et al. 2021

Geological Journal

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Located at the outer edge of the northeastern Tibetan Plateau, the Qilian Shan has long been considered to be the key area to address the issue of how the Tibetan Plateau generates its high topography. However, in spite of the fruitful achievements on the growth pattern and subtle crustal structures of the Qilian Shan, what we know about the regional topography evolution and its relationship with the deep structures are still lacking. In this study, the landscape features of the eastern Qilian Shan and the probable drainage evolution history of the Lenglong Ling, located within the central part of the eastern Qilian Shan, are investigated, based on the multiple geomorphic analyses (i.e., HI and steepness distributions, and the Gilbert and χ metrics). The topographic results show that high HI and steepness values distribute mainly in areas controlled by active faults (i.e., the mountain areas). In addition, the Gilbert and χ metrics suggest that the main Lenglong Ling divide is stable. According to the drainage divide stability criteria, we suggest that the presence of the uplift rate gradient in the eastern Qilian Shan (i.e., with higher uplift in the Lenglong Ling area), which is suggested by the topographic results, has driven the main divide to migrate southward and is now “holding” the divide in place. Taking the previously published magnetotelluric imaging into account, we reveal the coupling relationship between the deep structures and the regional geomorphic features, and further suggest that the Lenglong Ling Fault, or the Qilian‐Haiyuan Fault, makes a difference in regional strain transferring and relief generation.

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Uplifting mechanism of the Tibetan Plateau inferred from the characteristics of crustal structures

Liang,

Chen,

Tian

et al. 2023

Sci. China Earth Sci.

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Electrical structure of the middle Qilian Shan revealed by 3-D inversion of magnetotelluric data: New insights into the growth and deformation in the Northeastern Tibetan Plateau

Cited by 11 publications

References 46 publications

New Magnetotelluric Data Reveal Deep Fault Boundaries and Contrasting Late Cenozoic Fault Kinematics Between the Qilian Shan Thrust Wedge and Beishan‐Alxa Block, Western China

New Magnetotelluric Data Reveal Deep Fault Boundaries and Contrasting Late Cenozoic Fault Kinematics Between the Qilian Shan Thrust Wedge and Beishan‐Alxa Block, Western China

Geomorphic expression of the Lenglong Ling area, eastern Qilian Shan, and its coupling relationship with the deep structures

Uplifting mechanism of the Tibetan Plateau inferred from the characteristics of crustal structures

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