Distinct lateral variation of lithospheric thickness in the Northeastern North China Craton

Chen, Ling; Wang, Tao; Zhao, Liang; Zheng, Tianyu

doi:10.1016/j.epsl.2007.11.024

Cited by 269 publications

(185 citation statements)

References 47 publications

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“…Although the entire area of the Western Block of the NCC still remains stable, thinned lithosphere also is found in some marginal areas. Seismological results from receiver function and surface wave tomography indicate that lithospheric thickness in the Ordos Block can reach 160-200 km [5,13,14]. This suggests that the block is stable.…”

mentioning

confidence: 91%

“…The thick lithospheric mantle has been replaced by depleted asthenosphere or oceanic mantle, and the properties of the lithospheric mantle also have been essentially modified. This indicates lithospheric modification and even destruction of the Eastern Block of the NCC (Figure 1) [1][2][3][4][5][6]. Although lithospheric thinning and modification of lithospheric properties and thermal state have been characterized by many geochemical and geophysical studies, the dynamic mechanism of cratonic destruction still is widely disputed.…”

mentioning

confidence: 99%

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Uppermost mantle structure of the North China Craton: Constraints from interstation Pn travel time difference tomography

Hao

2011

Chin. Sci. Bull.

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confidence: 91%

mentioning

confidence: 99%

Uppermost mantle structure of the North China Craton: Constraints from interstation Pn travel time difference tomography

Hao

2011

Chin. Sci. Bull.

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“…Seismic tomography and magma xenoliths studies show that, in East China, the continental lithosphere was thinned over >100 km between Ordovician and Cenozoic (Menzies et al, 1993;Griffin et al, 1998;Chen et al, 2008;Chen, 2010;) with a main thinning period during JurassicCretaceous (Gao et al, 2002;Fu et al, 2005;Chen, 2010). Lithospheric thickness has been estimated to ~60 km in the study area for Jurassic-Cretaceous (Chen et al, 2008, Chen, 2010; this induces a high thermal gradient at that time. Such feature has also been shown by palaeogradients reconstructions through continental basin analyses (Fu et al, 2005).…”

Section: Role Of Crustal Partial Meltingmentioning

confidence: 99%

Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)

Charles¹,

Gumiaux²,

Augier³

et al. 2012

Tectonophysics

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International audienceMetamorphic Core Complexes (MCC) constitute remarkable features within wide rifts. Based on analogue and numerical modelling, MCC dynamics and structural development are mainly controlled by first geothermal gradient, second the compositional layering, and after the strain rate and partial melting. In the Late Mesozoic, continental extension occurred in East Asia leading to the development of MCC, magmatism and extensional sedimentary basins. Based on an integrated study (i.e. structural and finite strain analysis, petrofabrics, Anisotropy of Magnetic Susceptibility (AMS) and U/Pb on zircon dating), this paper aims at constraining the tectonic evolution and deformation mechanisms in the South Liaodong Peninsula (NE China). The Gudaoling massif is identified as a "migmatitic" MCC developed from Upper Jurassic (ca. 157-154 Ma) to Early Cretaceous (ca. 128-113 Ma). Intrusion of the Yinmawanshan synkinematic pluton (Early Cretaceous) to the south of the dome marks out the final stages of shearing along the Gudaoling detachment zone and of exhumation of the MCC into the upper crust. The Gudaoling MCC and the Yinmawanshan pluton stay in line with the coeval South Liaodong MCC, to the south, all making a ~ 140x30km wide extensional band formed during a regional E-W to NW-SE crustal stretching. The area shows a bi-phased development with a "slow" and a "fast" stage which correspond to (1) crustal necking and (2) dome amplification/exhumation stages according to published thermo-mechanical modelling results. Finally, the Gudaoling MCC lower unit almost exclusively displays migmatites and anatectic granitoids of Late Jurassic and Early Cretaceous, respectively. Occurrence of partial melting during earlier stages of extension seems controlling the initiation of MCC (as a soft anomaly within lower crust). In East Asia, a regional-scale thermal event, during Jurassic-Cretaceous times, may have significantly reduced the bulk lithosphere strength and locally induced partial melting, emphasizing pervasive deformations and development of a wide rift system

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“…The thinned lithosphere (up to 80 km) is found around the late Cenozoic Yinchuan-Hetao and Shaanxi-Shanxi rift areas (see Fig. 3 for locations), with sharp changes occurring over a lateral distance of 200-400 km (Chen et al 2008). As can be seen in Fig.…”

Section: Discussionmentioning

confidence: 53%

The spatiotemporal variation of the b-value and its tectonic implications in North China

Zheng

Zhou

2014

Earthq Sci

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In this study, we adopt an improved Bayesian approach based on free-knot B-spline bases to study the spatial and temporal distribution of the b-value. Synthetic tests show that the improved Bayesian approach has a superior performance compared to the Bayesian approach as well as the widely used maximum likelihood estimation (MLE) method in fitting the real variation of b-values. We then apply the improved Bayesian approach to North China and find that the b-value has a clear relevance to seismicity. Temporal changes of b-values are also investigated in two specific areas of North China. We interpret sharp decreases in the b-values as useful messages in earthquake hazard analysis.

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Distinct lateral variation of lithospheric thickness in the Northeastern North China Craton

Cited by 269 publications

References 47 publications

Uppermost mantle structure of the North China Craton: Constraints from interstation Pn travel time difference tomography

Uppermost mantle structure of the North China Craton: Constraints from interstation Pn travel time difference tomography

Metamorphic Core Complex dynamics and structural development: Field evidences from the Liaodong Peninsula (China, East Asia)

The spatiotemporal variation of the b-value and its tectonic implications in North China

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