Suggestion of a dynamic model of North China basin-range system*

Shao, Jing; Zhang, Changhou; Zhang, Lüqiao; Zhang, Yongbei

doi:10.1080/10020070312331343600

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Of these contraction deformations, the thrust tectonics in the western hills of Beijing have received the most attention in the past century. In contrast, the frontal normal fault zone in the east of the Taihang Mountain has been studied by only a few researchers [71,85,86], and the contraction deformations in this region have received very little attention [87]. Recent mapping in this region indicates that the northwest-vergent thrusts and related folds dominate the contraction deformations in the west of Yixian County, Hebei Province and the western hills of Beijing.…”

Section: Taihang Mountainmentioning

confidence: 90%

Mesozoic contraction deformation in the Yanshan and northern Taihang mountains and its implications to the destruction of the North China Craton

Zhang

Deng

et al. 2011

Sci. China Earth Sci.

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104

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Mesozoic contraction deformation in the Yanshan and Taihang mountains is characterized by basement-involved thrust tectonics, basement-cored buckling anticlines and ductile thrust and nappe tectonics. Most of these deformations are orientated west-east, west-northwest and northeast to north-northeast. The contraction deformations began in the Permian, continued through the Triassic and Jurassic and terminated in the Early Cretaceous, and constitute an important part of the destruction of the North China Craton. It is estimated, from balanced cross-section reconstructions, that the north-south shortening of the central part of the Yanshan belt before 135 Ma was around 38%. The initial crust thickness, pre-dating the major contraction deformation in late Paleozoic and early Mesozoic, was estimated to be around 35 km based on paleogeographic characteristics. Assuming that the inferred depth of ductile thrusting deformation, 20-25 km, was the crust thickness involved in the contraction deformation, and also assuming that the N-S contraction deformation was accommodated by vertical crust thickening, the thickness of the crust after the contraction deformation was expected to be around 47-50 km. This was the approximate crust thickness required for the eclogitization of the lower crust for delamination. The gravity potential accumulated by the isostatic uplift of the thickened crust, together with the decrease in crustal strength caused by the coeval magmatisms associated with the contraction deformation, led to the subsequent extensional collapse of the middle and upper crust although the regional stress regime associated with the plate interactions remained constant. It is inferred that the Mesozoic contraction deformations in the Yanshan and Taihang mountains were not only a significant tectonic process contributing to the destruction of the craton in middle and upper crust but also stimulated delamination at a deep level and the extension of the shallow crust. In other words, both the suspected delamination of the lower crust and upper mantle and the well constrained extension deformations of the shallow crust in the eastern North China Craton during the late Mesozoic are a consequence of crust thickening due to previous contractions. Extensional deformations could be expected to occur independently in the shallow crust, and are not necessarily associated with or responding to delamination at a deep level.

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Section: Taihang Mountainmentioning

confidence: 90%

Mesozoic contraction deformation in the Yanshan and northern Taihang mountains and its implications to the destruction of the North China Craton

Zhang

Deng

et al. 2011

Sci. China Earth Sci.

Self Cite

104

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show abstract

“…The North China Basin and related magmatism developed since early Cretaceous (Hou et al, 1998(Hou et al, , 2003(Hou et al, , 2006. The initial extension of the North China craton began in the late Jurassic-early Cretaceous (150 Ma) due to the delamination of the lithosphere and led to the thinning of the lithosphere and replacement of the mantle with the development of large volume of the volcanic and granitic rocks (Zhang et al, 2002(Zhang et al, , 2006Shao et al, 2003;Hou et al, 2003). On the other hand, late Jurassic intra-continental Yanshanian Orogen and the early Cretaceous post-orogenic extension triggered the destruction the NC (Dong et al, 2007;Hou et al, 2009).…”

Section: Implications For Tectonic Transmissionmentioning

confidence: 96%