Mesozoic intracontinental orogeny in the Qinling Mountains, central China

Dong, Yunpeng; Yang, Zhao; Liu, Xiaoming; Sun, Shengsi; Li, Wei; Cheng, Bin; Zhang, Feifei; Zhang, Xiaoning; He, Dengfa; Zhang, Guowei

doi:10.1016/j.gr.2015.05.004

Cited by 161 publications

(80 citation statements)

References 49 publications

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“…(1) During the Late Permian, point‐to‐point collision happened between the SCB and the SQB, thereby forming a series of N‐S trending collision‐related rift basins in the SQL and N‐SCB (Xiao et al, ). (2) From the Late Jurassic to the Early Cretaceous, large‐scale N‐S compression and overthrusting progressed outward from the inner QOB to the NCB and SCB due to the renewed southward intracontinental subduction of the NCB and the continuous northward subduction of the SCB, respectively (Dong et al, ). (3) Beginning in the Middle Eocene, E‐W trending extension in Eastern China, which was controlled by the subduction of the western Pacific plate, formed a series of N‐S trending rift basins transverse to the Qinling Dabie Orogen in this region (Liu & Zhang, ).…”

Section: Discussionmentioning

confidence: 99%

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

et al. 2018

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Determining high‐resolution three‐dimensional (3‐D) crustal structures of the Qinling Orogenic Belt (QOB) can reveal significant evidences to enhance our understanding of its tectonic evolution. By jointly inverting group and phase velocity dispersion curves, we obtain a high‐resolution 3‐D shear wave velocity model for the QOB. According to the obviously layered features, which include an E‐W trending high‐velocity structure in the upper crust (0–10 km), a transitional zone in the middle crust (10–30 km), and an approximately N‐S trending low‐velocity zone in the middle‐lower crust (20–40 km), we elucidate the crustal structure as a flyover model to explain how the crust beneath the QOB was deformed under the perpendicular force systems from the NE‐SW and E‐W directions during the Meso‐Cenozoic. First, the apparent NE‐SW trending low‐velocity zone in the middle‐lower crust indicates that the low‐viscosity crustal materials beneath the northeastern Tibetan Plateau did not flow eastward into the eastern Qinling terrane during the Cenozoic. Second, the extension in the northern Qinling Mountains and Weihe Basin was not largely affected by the lateral crustal growth of the NE Tibetan Plateau, which might be the result of deep mantle upwelling and/or residual effects from the subduction of the western Pacific plate. Third, during the Mesozoic, the high‐velocity structures beneath the Hannan‐Micang and Shennongjia‐Huangling domes served as anchors resisting the northward subduction, rotation, and continuous collision of the Yangtze Block. The eastward extruding Hannan‐Micang dome served as an indenter that eventually shaped the present‐day asymmetric style of the Dabashan Orocline during the Cenozoic.

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Section: Discussionmentioning

confidence: 99%

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

et al. 2018

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“…Detailed investigations indicate that the QOB experienced the Meso‐Neoproterozoic accretionary and collisional tectonics between the North China Block (NCB) and North Qinling Belt (NQB; Cao et al, ; Dong et al, ; Z. Zhang et al, ), Palaeozoic subduction and convergence along the Shangdan Suture between the NQB and South Qinling Belt (SQB; Dong et al, ; Y. Li, Yang, et al, ; H. Yu et al, ), and the Triassic collisional orogeny along the Mianlue Suture between the SQB and South China Block (SCB; Dong et al, ; N. Li, Chen, Santosh, & Pirajno, ). Then, the whole QOB evolved into the intracontinental tectonic process (Dong et al, ). These series of tectonic uplift and orogenic activities have controlled the adjacent basin formation and evolution of the southern margin of the NCC, making the QOB and southern margin of the NCC constitute a basin–mountain system.…”

Section: Introductionmentioning

confidence: 99%

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

et al. 2018

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Basin formation and sedimentary development in the southern North China Craton (NCC) are closely related to the tectonic evolution of the Qinling Orogenic Belt (QOB). With the aim of revealing the coupling evolution between the QOB and southern NCC during the Late Palaeozoic, an investigation based on provenance analysis was performed in this study. We present new detrital zircon U–Pb data from the Middle–Late Permian sediments in the Yiyang area, southern NCC. The results show that detrital zircons, from the Middle Permian Shihezi Formation, have three major peaks at 2,447, 1,905, and 296 Ma. In contrast, the lower and upper parts of the Late Permian Sunjiagou Formation yield major peaks at ~1.85 Ga and ~260 Ma, with weak peaks at ~2.5 Ga, ~450 Ma, and ~315 Ma, and the middle part of the Sunjiagou Formation displays a major peak at 429 Ma. Combined with published palaeocurrent data and lithofacies palaeogeography, the sediments of the Middle Permian Shihezi Formation were sourced from the Inner Mongolia Palaeo‐Uplift along the northern margin of the NCC, whereas the Upper Permian Sunjiagou Formation originated mainly from the southern margin of the NCC including the North Qinling Belt. This provenance shift indicates that the North Qinling Belt and southern margin of the NCC initiated the uplift and exhumation during the Late Permian. On the basis of the evolutionary history of the QOB, we attribute the uplift geodynamics to the Mianlue oceanic crust subduction. This study provides important sedimentological constraints for the tectonic conversion during the Late Palaeozoic along the southern margin of the NCC, which also restricts the start‐up time of the Mianlue oceanic crust subduction from the perspective of the basin–mountain system.

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“…Geological Background 2.1. Qinling Thrust imbricates involving Lower to Middle Jurassic strata manifest postcollisional, intracontinental shortening in the Qinling and Daba Shan [e.g., Dong et al, 2008Dong et al, , 2015Shi et al, 2012]; in addition, their Paleozoic-Mesozoic structures were reactivated during the Late Cretaceous-Cenozoic [e.g., Mattauer et al, 1985;Zhang et al, 1995;Ratschbacher et al, 2003]. Active faults, with mostly sinistral strike-slip kinematics, were traced from the Kunlun and Qilian Shan in the west to the Dabie Shan in the east.…”

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confidence: 99%

Sichuan Basin and beyond: Eastward foreland growth of the Tibetan Plateau from an integration of Late Cretaceous‐Cenozoic fission track and (U‐Th)/He ages of the eastern Tibetan Plateau, Qinling, and Daba Shan

et al. 2017

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Combining 121 new fission track and (U‐Th)/He ages with published thermochronologic data, we investigate the Late Cretaceous‐Cenozoic exhumation/cooling history of the eastern Tibetan Plateau, Qinling, Daba Shan, and Sichuan Basin of east central China. The Qinling orogen shows terminal southwestward foreland growth in the northern Daba Shan thrust belt at 100–90 Ma and in the southern Daba Shan fold belt at 85–70 Ma. The eastern margin of Tibetan Plateau experienced major exhumation phases at 70–40 Ma (exhumation rate 0.05–0.08 mm/yr), 25–15 Ma (≤1 mm/yr in the Pengguan Massif; ~0.2 mm/yr in the imbricated western Sichuan Basin), and since ~11–10 Ma along the Longmen Shan (~0.80 mm/yr) and the interior of the eastern Tibetan Plateau (Dadu River gorge, Min Shan; ~0.50 mm/yr). The Sichuan Basin records two basin‐wide denudation phases, likely a result of the reorganization of the upper Yangtze River drainage system. The first phase commenced at ~45 Ma and probably ended before the Miocene; >1 km of rocks were eroded from the central and eastern Sichuan Basin. The second phase commenced at ~12 Ma and denudated the central Sichuan Basin, Longmen Shan, and southern Daba Shan; more than 2 km of rocks were eroded after the lower Yangtze River had cut through the Three Gorges and captured the Sichuan Basin drainage. In contrast to the East Qinling, which was weakly effected by late Cenozoic exhumation, the West Qinling and Daba Shan have experienced rapid exhumation/cooling since ~15–13 Ma, a result of growth of the Tibetan Plateau beyond the Sichuan Basin.

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Mesozoic intracontinental orogeny in the Qinling Mountains, central China

Cited by 161 publications

References 49 publications

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

Flyover Crustal Structures Beneath the Qinling Orogenic Belt and Its Tectonic Implications

Detrital zircon U–Pb ages from the Middle to Late Permian strata of the Yiyang area, southern North China Craton: Implications for the Mianlue oceanic crust subduction

Sichuan Basin and beyond: Eastward foreland growth of the Tibetan Plateau from an integration of Late Cretaceous‐Cenozoic fission track and (U‐Th)/He ages of the eastern Tibetan Plateau, Qinling, and Daba Shan

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