Channelised magma ascent and lithospheric zonation beneath the Songliao Basin, Northeast China, based on surface-wave tomography

Feng, Min; An, Meijian; Hanru, Hou; Fan, Taoyuan; Zang, Hongkuan

doi:10.1016/j.tecto.2023.229969

Cited by 3 publications

(1 citation statement)

References 72 publications

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“…Meanwhile, the S-wave velocity structure of the delamination model (Figure 5c) shows that the upper mantle beneath the SLB is dominated by high velocity, with a fast, slow, fast pattern of anomalies. This signature is consistent with previous velocity models (Fan et al, 2021;Feng et al, 2023;Kang et al, 2016). These highvelocity anomalies beneath the SLB generally represent detached lithosphere fragments (Zhang et al, 2022), and the calculated S-wave velocity distribution also reproduces the significant high velocity of ~4.55 km/s at depths of the detached lithosphere (Shen et al, 2016; Figure 5c).…”

Section: Lithospheric Thinning Mechanism Beneath the Slbsupporting

confidence: 90%

Geophysical‐petrological modelling of the crust and upper mantle structure across the North‐South Gravity Lineament in NE China: Insights into the lithospheric thinning mechanism

Zhu,

Deng,

Zhang

et al. 2023

Terra Nova

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The North‐South Gravity Lineament (NSGL), characterized by an abrupt variation in both the Bouguer gravity anomaly and topography, acts as a significant geological boundary in eastern China. The formation of such a lateral feature is believed to be associated with lithospheric thinning. The Songliao Basin (SLB) is considered to mark the centre of the lithospheric thinning in Northeast China, whereas its thinning mechanism remains unclear. Here we perform integrated geophysical‐petrological modelling of the crust and upper mantle structure along a passive‐source seismic profile crossing the NSGL, to understand the thinning mechanism beneath the SLB based on the constructed lithospheric extension and delamination models. Our delamination model identifies the compositional variation across the NSGL and the S‐wave velocity signature dominated by high velocity beneath the SLB, which are compatible with previous geochemical and geophysical results. The multidisciplinary analyses suggest that the lithospheric delamination is a plausible mechanism to account for the thinning to the east of the NSGL. The resulting model also shows that the NSGL is a lithospheric‐scale geophysical and geochemical boundary separating two distinct structural domains. In combination with previous evidence, structural discrepancies across the NSGL can be attributed to the lithospheric delamination driven by the subduction of the Palaeo‐Pacific plate.

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Section: Lithospheric Thinning Mechanism Beneath the Slbsupporting

confidence: 90%

Geophysical‐petrological modelling of the crust and upper mantle structure across the North‐South Gravity Lineament in NE China: Insights into the lithospheric thinning mechanism

Zhu,

Deng,

Zhang

et al. 2023

Terra Nova

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Discovery of the Paleozoic Forearc Basin on the Western Slope of the Songliao Basin, Northeast China and its Constraints on Tectonic Evolution of the Paleo Asian Ocean

zhang,

Li,

et al. 2024

Preprint

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Numerical Simulation of Seismic-Wave Propagation in Specific Layered Geological Structures

Hao,

Gu,

et al. 2024

Applied Sciences

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This study presents a numerical simulation approach used to investigate seismic-wave propagation in specific geological structures. Using the LS-DYNA software, the simulation incorporated a TNT explosion model to simulate seismic energy released during earthquakes. It provides a new method to investigate the propagation characteristics of seismic-waves within geological structures. Firstly, the measurement conditions and geological settings of the seismic event on 18 February 2012 in Northeast China are presented. Subsequently, a numerical simulation model of seismic-wave propagation is developed. The simulation result validates it by comparing it with recorded data from seismic stations, demonstrating a promising correspondence between the simulated and observed data. Additionally, the simulation simulates the seismic-wave propagation within water and layered geological structures, validating the numerical simulation model. The numerical model is an effective tool for simulating the propagation of seismic waves in geological structures. This study is important for evaluating seismic-wave propagation using the simulation method.

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Channelised magma ascent and lithospheric zonation beneath the Songliao Basin, Northeast China, based on surface-wave tomography

Cited by 3 publications

References 72 publications

Geophysical‐petrological modelling of the crust and upper mantle structure across the North‐South Gravity Lineament in NE China: Insights into the lithospheric thinning mechanism

Geophysical‐petrological modelling of the crust and upper mantle structure across the North‐South Gravity Lineament in NE China: Insights into the lithospheric thinning mechanism

Discovery of the Paleozoic Forearc Basin on the Western Slope of the Songliao Basin, Northeast China and its Constraints on Tectonic Evolution of the Paleo Asian Ocean

Numerical Simulation of Seismic-Wave Propagation in Specific Layered Geological Structures

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