High-resolution crustal velocity structure in the Shanxi rift zone and its tectonic implications

Dou, Liting; Yao, Huajian; Fang, Lihua; Luo, Song; Song, Meiqin; Yan, Xiaomei; Cheng, Cheng

doi:10.1007/s11430-020-9710-x

Cited by 5 publications

(6 citation statements)

References 53 publications

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“…(2022), is shallower in the northern TNCO than the southern segment (Figure 3a and Figure S9 in Supporting Information ), implying a hot and mechanically weak lower crust beneath the northern TNCO. By contrast, a high‐velocity patch can be observed in the uppermost mantle underneath the southern TNCO (Figures 3a and 4b) (Ai et al., 2019; Dou et al., 2021). The mantle xenoliths from Hebi basalts (4 Ma) are dominant by refractory composition and proposed to indicate the existence of Archean lithosphere mantle relics (Sun et al., 2012; Zheng et al., 2001).…”

Section: Discussionmentioning

confidence: 99%

“…The thin and weak lithosphere along the ZBFZ accommodates dramatic GPS velocity change, while the southern NCB with thicker lithosphere suffers a lower degree of deformation (Figure 3b). In the TNCO, the uppermost mantle and lower crust underneath the northern TNCO exhibit remarkably low velocities (Figures 2c and 3a), implying hot upwelling and magmatic underplating (Ai et al., 2019; Dou et al., 2021; Xu et al., 2005; Zhang, Yao et al., 2018). The lower bound of the hypocenters, relocated by Han et al.…”

Section: Discussionmentioning

confidence: 99%

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Ongoing Lithospheric Alteration of the North China Craton Revealed by Surface‐Wave Tomography and Geodetic Observations

Feng

Yao

Chen

et al. 2022

Geophysical Research Letters

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The North China Craton (NCC) is renowned for cratonic reactivation and dramatic destruction. Detailed lithospheric structure is crucial for understanding the geological evolution and seismogenesis of the NCC. We imaged the lithospheric structure of the central and eastern NCC with ambient noise and teleseismic surface wave tomography. Our new model unveils remarkable N‐S variation in the lithospheric structure. An E‐W elongated lithospheric weak zone, coinciding with contemporary left‐lateral shearing revealed by geodetic observation, occupies the northern central and eastern NCC. Our model suggests that radical destruction of the eastern NCC in the late Mesozoic facilitated the late‐Cenozoic shearing induced by the continuous India‐Eurasia convergence. The late‐Cenozoic shearing progressively altered the pre‐thinned lithosphere accompanied by asthenospheric upwelling and strong seismic activity. Our results suggest a transition from the Pacific subduction dominating tectonic regime to the India‐Asia collision dominating lithospheric deformation framework in the Cenozoic and ongoing lithospheric alteration of the NCC.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Ongoing Lithospheric Alteration of the North China Craton Revealed by Surface‐Wave Tomography and Geodetic Observations

Feng

Yao

Chen

et al. 2022

Geophysical Research Letters

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“… Conceptual lithospheric‐scale rifting model in the Linfen Basin of the Shanxi Rift System summarizing the geological and geodynamic interpretations. The high‐velocity anomalies in the lower crust (Dou et al., 2021; Ling et al., 2017) are interpreted as cooled sill‐like intrusions. The Lüliang Shan in the research region is a monocline controlled by the Lishi Fault (B. Zhang et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…The LB in the south‐central SRS offers an opportunity to investigate the roles of magmatism, pre‐existing structures, and extension rates. A large variety of geophysical observations, for example, controlled source seismic experiments (e.g., S. Li et al., 2011; Z. Li et al., 2014), receiver functions (e.g., Cai et al., 2021; L. Chen et al., 2014; Z. Wei et al., 2011; Y. Zhang et al., 2019), tomography (Dou et al., 2021; Ling et al., 2017; Y. Tang et al., 2010), and magnetotelluric sounding (Y. Yin et al., 2017) provide insights into the lithospheric configuration of the basin. Moreover, pre‐rift structures such as Paleoproterozoic shear zones and Mesozoic thrusts have been mapped in the Shanxi region (e.g., B. Zhang et al., 2021; G. Zhao et al., 2005).…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the Structure and Extension Rate of the Linfen Basin, Shanxi Rift System Since the Latest Miocene: Implications for Continental Magma‐Poor Rifting

Su,

He,

Liu

et al. 2023

Tectonics

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The formation of magma‐poor continental rifts is an enigmatic process, as the weakening mechanism(s) for cratonic lithosphere remains uncertain in the absence of elevated lithospheric temperature. One view links weakening to melts hidden at depth, while another ascribes it to pre‐existing weaknesses. Long‐term extensional rates also influence lithospheric strength and rift evolution. We target the Linfen Basin (LB) in the magma‐poor Shanxi Rift System (SRS) in the North China Craton to understand these components. We apply cosmogenic 26Al/10Be burial dating on 14 core samples at different depths from three deep boreholes in the basin and obtain six valid burial ages ranging from 2.37+1.18/−1.21 to 5.86+inf/−1.37 Ma. We further re‐interpret a seismic reflection profile and quantify the geometry and amount of extension by forward structural modeling with multiple constraints based on extensional fault‐bend folding theory. The timing of the basal sedimentation is estimated to be ∼6.1 and ∼4.2 Ma in the southern and northern portions, respectively, indicating diachronous, northward‐propagating rifting. The amount and mean rate of extension are ∼3.6 km and ∼0.9 km/Myr, respectively. The basin depths increasing northward indicates the clockwise rotation of the basin. We propose a basin‐scale non‐rigid transtensional bookshelf faulting model to explain the rotation patterns of the circum‐Ordos basins. We argue that the inherited structures weaken the cratonic lithosphere of the SRS, and the low extension rate contributes to its magma‐poor nature. We propose a lithospheric‐scale evolution model for the LB, invoking the inherited crustal weakness, low extension rate, and lower lithosphere counterflow.

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Morphometric analysis of the North Liuleng Shan Fault in the northern Shanxi Graben System, China: Insights into active deformation pattern and fault evolution

et al. 2023

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High-resolution crustal velocity structure in the Shanxi rift zone and its tectonic implications

Cited by 5 publications

References 53 publications

Ongoing Lithospheric Alteration of the North China Craton Revealed by Surface‐Wave Tomography and Geodetic Observations

Ongoing Lithospheric Alteration of the North China Craton Revealed by Surface‐Wave Tomography and Geodetic Observations

Quantifying the Structure and Extension Rate of the Linfen Basin, Shanxi Rift System Since the Latest Miocene: Implications for Continental Magma‐Poor Rifting

Morphometric analysis of the North Liuleng Shan Fault in the northern Shanxi Graben System, China: Insights into active deformation pattern and fault evolution

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