Tracing exhumation of the Dabie Shan ultrahigh-pressure metamorphic complex using the sedimentary record in the Hefei Basin, China

Liu, Shaofeng; Zhang, Guowei; Ritts, Bradley D.; Zhang, Huiping; Gao, Mingxing; Qian, Chao

doi:10.1130/b26524.1

Cited by 32 publications

(55 citation statements)

References 51 publications

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“…Paleocurrent indicators from imbricated gravel and cross stratification show flow that is directed toward the present-day north-northeast. The Sanjianpu Formation is interpreted to have been deposited by braided channel systems [13]. Corresponding to the Sanjianpu Formation, the Zhuji Formation at Wumiao section is interpreted to record a braided, channel-plain depositional system with some fine-grained overbank deposits.…”

Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

“…142 Ma. Doming of the NDC modified the flat-lying (a) and (b) were modified from Liu et al [13]; (c) was modified from Zhao et al [32].…”

Section: North Huaiyang Fold-thrust Belt (Nhfb)mentioning

confidence: 99%

“…These rocks are stratigraphically subdivided into the Tongzhuyuan Formation (or Baitianba Formation, Wuchang Group) and Huajiahu Formation (or Qianfoya and Shaximiao Formations) in the Southeast Hubei basin, Dangyang basin, and Zigui basin of the southern flank [26], and Fanghushan Formation and Sanjianpu Formation (or Zhuji Formation, Yuantongshan Formation) in the Hefei basin of the northern flank [13] (Figures 1 and 3).…”

Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

“…Paleoflow, based on tabu-lar cross sets, was to the south or the south-southeast. The Fanghushan Formation, filled in the Hefei basin at the northern flank of the Dabie orogen, is composed mainly of alluvial fan and meandering channel deposits, including massive and laminated conglomerate at its base and isolated channel-belt sand bodies with cross bedding distributed among flood-plain siltstones in its upper part [12,13] (Figure 5). Therefore, the Early Jurassic deposits were the depositional response to the initial thrusting of the second episodic tectonism at the foreland and hinterland of the Dabie orogen.…”

Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

“…Postorogenic erosion has removed many of the supracrustal units and structural deformation zones, limiting structural reconstructions of this area. However, sedimentation into adjacent basins provides another constraint on orogeny [12], and the detrital composition of the sediments in the basins records the structural frameworks, the spatial and temporal patterns of exhumation of the different rock units in the Dabie orogen and their contribution to basin sediments, and the initial unroofing age of the UHP complex [13]. Based on the newly research results on basin development and its indication of orogeny in the Dabie orogen, this paper is intended to synthetically introduce the structural deformation, basin-filling sequence, provenance of basin sediments, evolution of the basin/ mountain system, and its coupling relationship, aiming to provide a reference for the study on the geodynamics of basin/mountain system in the Dabie orogen or the other orogen.…”

mentioning

confidence: 99%

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Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

Liu

Zhang

2012

Chin. Sci. Bull.

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The Dabie orogen underwent deep continental subduction, rapid exhumation, and the huge amount of erosion during the Mesozoic. Its tectonic evolution, especially how its evolution was recorded by sedimentary basins at the flanks of the Dabie orogen is one of the most important issues of the world's attention. These years, newly studies of basin sedimentology, combined with structural geology, have shown a fundamental progress. The overall distribution of different basin types in the orogen indicates that shortening and thrusting at the margins of the orogen from the Late Triassic to the Early Cretaceous controlled the foreland basins, and extension, doming and rifting were initiated in the core of the orogen from the Jurassic to the Early Cretaceous and were expanded to the whole orogen after the Late Cretaceous. Therefore, The Dabie orogen records gradual transition from overall shortening and thrusting to dominantly extension and rift basin formation expanded from its core to its margins, although these shortening and extension overlapped in time from the Jurassic through Early Cretaceous at crustal levels. The unroofing ages of the ultra-high pressure (UHP) metamorphic rocks in the Dabie orogen change from Early Jurassic to Late Jurassic westward. The depth of exhumation increases eastwards. The sediment sources for the Hefei basin are mostly composed of the deeply exhumed, axial Dabie metamorphic complex, and the sediment sources for the Middle Yangtze basin are mostly from cover strata in the southern orogen and related strata with subjacent (i.e. subsequently overthrusted) Mianlue suture belt. Geodynamic analysis represents that continental collision between the North China Block and the South China Block along the Shangdan and Mianlue sutures, subsequently northwestward progradation of the Jiangnan fold and thrust belt, and the underthrusting of the North China Block along the Northern Boundary Fault of Qinling Range led to crustal thickening, gravitational spreading and balanced rebound of the resultant thick crustal welt, and multi-episodic exhumation of the HP/UHP metamorphic rocks. The future studies by the methods of tracing the Dabie orogeny through deposition in the marginal basins should focus on eastward extension of the Mianlue suture, thrust and overlap of the Dabie HP/UHP metamorphic block on different lithotectonic zones and basins along the northern South China Block, the structural framework of the source area of the basins in the syn-depositional stage, the basin lateral extension, huge amount of erosion and sediment transportation from the Dabie blanket and basement rocks, and recovery of subducted and removed structural units within the Dabie orogen, etc.Dabie orogen, sedimentary basin, evolution of basin/mountain system, HP/UHP metamorphic rocks, provenance analysis, exhumation process, depositional paleogeography

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Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

“…142 Ma. Doming of the NDC modified the flat-lying (a) and (b) were modified from Liu et al [13]; (c) was modified from Zhao et al [32].…”

Section: North Huaiyang Fold-thrust Belt (Nhfb)mentioning

confidence: 99%

Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

Section: Early-middle Jurassic Tectonic Sequencementioning

confidence: 99%

mentioning

confidence: 99%

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Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

Liu

Zhang

2012

Chin. Sci. Bull.

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Oblique closure of the northeastern Paleo-Tethys in central China

et al. 2015

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A branch of the Paleo-Tethys Ocean once separated the north China plate from the south China plate. However, the mode of closure of the northeastern Paleo-Tethys Ocean during the Late Paleozoic to Early Mesozoic has been debated. One reason for this debate is that the collisional suture zone was later buried by large-scale thrust faults in the southern Qinling-Dabieshan orogen, which made it difficult to reconstruct the amalgamation of the supercontinent in central China. New regional geologic mapping provides stratigraphic and structural constraints on the mechanism of this ocean closure. Our results indicate that dextral transpressional suturing in the southern Qinling-Dabieshan foreland fold-thrust belt resulted in the formation of the northern Yangtze foreland basin, where the stratigraphy precisely shows the time-transgressive closure of the ocean, and the orogenic sediments shed over 1000 km westward from eastern China to the closing Paleo-Tethys. Therefore, we propose an oblique subduction model to describe the closure of the Paleo-Tethys Ocean. Our findings suggest that prolonged slab pull during the oblique subduction of the oceanic plate continued to drive deep continental subduction, thereby forming high-and ultrahigh-pressure metamorphic rocks and leading to sustained ocean closure.

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Detrital zircon U-Pb dating in the southern Hefei Basin: Evidence for exhumation of HP-UHP rocks of the Dabie Orogen

Wang

Bai

Tian

et al. 2020

Sci. China Earth Sci.

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Tracing exhumation of the Dabie Shan ultrahigh-pressure metamorphic complex using the sedimentary record in the Hefei Basin, China

Cited by 32 publications

References 51 publications

Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

Oblique closure of the northeastern Paleo-Tethys in central China

Detrital zircon U-Pb dating in the southern Hefei Basin: Evidence for exhumation of HP-UHP rocks of the Dabie Orogen

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