Local modification of the lithosphere beneath the central and western North China Craton: 3-D constraints from Rayleigh wave tomography

Jiang, Mingming; Ai, Yinshuang; Chen, Ling; Yang, Yingjie

doi:10.1016/j.gr.2012.06.018

Cited by 95 publications

(87 citation statements)

References 125 publications

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“…The~200 km depth of the MDHV under the eastern Ordos agrees with previous tomographic studies (e.g., Huang et al, 2009;Jiang et al, 2013;Li and Van der Hilst, 2010) and receiver function imaging results (e.g., Fig. 8e, Chen et al, 2014) that reveal a thick cratonic keel of about 200 km beneath this region.…”

Section: Lateral Velocity Variation In the Lithospheric Mantle In Ordossupporting

confidence: 91%

“…In eastern NCC, the thick (N180 km), cold (~40 mW/m 2 ) and depleted Paleozoic lithosphere was widely replaced by a thin (b100 km), hot (~65 mW/m 2 ) and relatively fertile lithosphere in the Mesozoic to Cenozoic time, accompanied by voluminous magmatism and intensive tectonic extension (e.g., Chen et al, 2006;Li et al, 2009;Menzies et al, 1993;Ren et al, 2002;Zhang et al, 2012). In contrast, the central and western NCC are characterized by the coexistence of both preserved thick and significantly thinned lithosphere and marked structural (e.g., Bao et al, 2011;Jiang et al, 2013;Zhao et al, 2009) and chemical heterogeneities (e.g., Wang et al, 2006;Xu, 2007). The Ordos Block (which forms the major part of western NCC, Fig.…”

Section: Geological Settingmentioning

confidence: 99%

“…The Ordos Block (which forms the major part of western NCC, Fig. 1) is characterized by low surface heat flow (Hu et al, 2000), little seismicity and magmatic activity (Zhai and Liu, 2003) and a N200 km thick and high-velocity mantle root (e.g., Chen et al, 2009;Jiang et al, 2013;Zhao et al, 2009). The Cenozoic rift systems that surround the Ordos Block, including the Shaanxi-Shanxi rift to the east and southeast and the YinchuanHetao rift to the northwest, feature relatively high heat flows (Hu et al, 2000), substantially thinned lithosphere up to 80 km thick ) and low-velocity anomalies in the upper mantle (Jiang et al, 2013;Zhao et al, 2009).…”

Section: Geological Settingmentioning

confidence: 99%

“…In the inversion, the initial upper mantle model in central and western NCC came from the average S-wave velocity depth profile from surface-wave tomography (Jiang et al, 2013), and that in QB was taken from the global AK135 model (Kennett et al, 1995). The initial crustal models were constructed by incorporating the local S-wave velocity models from waveform inversion of receiver functions (Zheng et al, 2012) and the Moho depths and crustal Vp/Vs ratios from H-κ stacking of receiver functions (Wei et al, 2011).…”

Section: Inversion Schemementioning

confidence: 99%

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Lithospheric structure beneath the central and western North China Craton and the adjacent Qilian orogenic belt from Rayleigh wave dispersion analysis

et al. 2015

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Section: Lateral Velocity Variation In the Lithospheric Mantle In Ordossupporting

confidence: 91%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Inversion Schemementioning

confidence: 99%

See 2 more Smart Citations

Lithospheric structure beneath the central and western North China Craton and the adjacent Qilian orogenic belt from Rayleigh wave dispersion analysis

et al. 2015

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“…The eastern NCC underwent severe lithospheric thinning and destruction and formed widespread thick sedimentary basins with elevations generally <200 m (Menzies et al, 1993;Chen et al, 2006;Zhu et al, 2012). However, the central and western NCC show coexistence of localized modified (rifts) and mainly preserved (Ordos) lithosphere, with elevations generally >500 m (Zhai et al, 2003;Chen et al, 2009;Jiang et al, 2013). The unique tectonic evolution and lithospheric structures make the NCC a natural laboratory to study cratonic formation, evolution and destruction.…”

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confidence: 99%

Regional differences in crustal structure of the North China Craton from receiver functions

Wei

Chu

Chen

2015

Sci. China Earth Sci.

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Moho depth and crustal average Poisson's ratio for 823 stations are obtained by H- stacking of receiver functions. These, together with topography and receiver function amplitude information, were used to study the crustal structure beneath the North China Craton (NCC). The results suggest that modified and preserved crust coexist beneath the craton with generally Airy-type isostatic equilibrium. The equilibrium is relatively low in the eastern NCC and some local areas in the central and western NCC, which correlates well with regional geology and tectonic features. Major differences in the crust were observed beneath the eastern, central, and western NCC, with average Moho depths of 33, 37, and 42 km and average Poisson's ratios of 0.268, 0.267 and 0.264, respectively. Abnormal Moho depths and Poisson's ratios are mainly present in the rift zones, the northern and southern edges of the central NCC, and tectonic boundaries. The crust beneath Ordos retains the characteristics of typical craton. Poisson's ratio increases roughly linearly as Moho depth decreases in all three parts of the NCC with different slopes. Receiver function amplitudes are relatively large in the northern edge of the eastern and central NCC, and small in and near the rifts. The Yanshan Mountains and southern part of the Shanxi rift show small-scale variations in the receiver-function amplitudes. These observations suggest that overall modification and thinning in the crust occurred in the eastern NCC, and local crustal modification occurred in the central and western NCC. Different crustal structures in the eastern, central, and western NCC suggest different modification processes and mechanisms. The overall destruction of the crustal structure in the eastern NCC is probably due to the westward subduction of the Pacific Plate during the Meso-Cenozoic time; the local modifications of the crust in the central and western NCC may be due to repeated reactivations at zones with a heterogeneous structure by successive thermal-tectonic events during the long-term evolution of the NCC.North China Craton, Moho depth, Poisson's ratio, gravitational equilibrium, receiver function amplitude, regional difference in crust Citation:

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Anisotropic Rayleigh wave phase velocity maps of eastern China

et al. 2014

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We explore the variations of Rayleigh wave phase velocity beneath eastern China in a broad period range (20-200 s). Rayleigh wave dispersion curves are measured by the two-station technique for a total of 734 interstation paths using vertical component broadband waveforms at 39 seismic stations in eastern China from 466 global earthquakes. In addition, 599 waveform inversion interstation measurements were added to this data set. The interstation dispersion curves are then inverted for high-resolution isotropic and azimuthally anisotropic phase velocity maps at periods between 20 and 200 s. At shorter periods sampling the crustal depth range, phase velocities are higher in the southeastern part of the region, reflecting the thinner crust there. The Jiangnan Belt separates Cathaysia from the Yangtze Craton, the latter with thicker crust and a deep, high-velocity cratonic root. The eastern part of Yangtze Craton, however, east of 115-116• E, does not display a deep root and has a thin lithosphere. Azimuthal anisotropy at long periods (>120 s) shows fast propagation directions broadly similar to that of the absolute plate motion. Beneath Cathaysia and eastern Yangtze Craton, anisotropy in the asthenosphere is strong and suggests coast-perpendicular flow. Asthenospheric flow from beneath China's thick continental lithosphere toward the thinner lithosphere of the margin and the resulting decompression melting may be the fundamental causes of the intraplate basaltic volcanism along the eastern coast of China.

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Local modification of the lithosphere beneath the central and western North China Craton: 3-D constraints from Rayleigh wave tomography

Cited by 95 publications

References 125 publications

Lithospheric structure beneath the central and western North China Craton and the adjacent Qilian orogenic belt from Rayleigh wave dispersion analysis

Lithospheric structure beneath the central and western North China Craton and the adjacent Qilian orogenic belt from Rayleigh wave dispersion analysis

Regional differences in crustal structure of the North China Craton from receiver functions

Anisotropic Rayleigh wave phase velocity maps of eastern China

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