Triassic two-stage intra-continental orogensis of the South China Block, driven by Paleotethyan closure and interactions with adjoining blocks

Wang, Yuejun; Wang, Yang; Zhang, Yuzhi; Cawood, Peter A.; Qian, Xin; Gan, Chengshi; Zhang, Feifei; Zhang, Peizhen

doi:10.1016/j.jseaes.2020.104648

Cited by 31 publications

(27 citation statements)

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“…The SCB collided with the North China and Indochina block to the north and south in the Triassic, respectively, establishing the main tectonic framework of the SCB (Wang et al, 2013). The N-S-directed shortening may have occurred in the early Triassic (~250-225 Ma), and may have resulted in dextral thrusting along a series of the WNW-/W-trending fault and fold systems (Figure 1; Wang et al, 2021). Sinistral transpression may have occurred along the NE-trending fold and fault belts in the SCB interior (ca.…”

Section: Frontiers In Earth Sciencementioning

confidence: 99%

“…Sinistral transpression may have occurred along the NE-trending fold and fault belts in the SCB interior (ca. 230-190 Ma; Figure 1; Wang et al, 2021). Affected by the west-dipping Paleo-Pacific subduction and subsequent rollback, these NE-trending structures were reactivated and experienced multiple stages of deformation in the late Mesozoic (e.g., Wang et al, 2013, Wang et al, 2021Li et al, 2014).…”

Section: Frontiers In Earth Sciencementioning

confidence: 99%

“…230-190 Ma; Figure 1; Wang et al, 2021). Affected by the west-dipping Paleo-Pacific subduction and subsequent rollback, these NE-trending structures were reactivated and experienced multiple stages of deformation in the late Mesozoic (e.g., Wang et al, 2013, Wang et al, 2021Li et al, 2014). Furthermore, widespread extensional (half-)grabens with red bed sedimentation, dome structures, and magmatism were developed in the Cretaceous, reflecting regional extension (e.g., Faure et al, 1996;Shu et al, 1998;Zhou et al, 2006;Shu et al, 2009;Chu et al, 2019).…”

Section: Frontiers In Earth Sciencementioning

confidence: 99%

“…The major tectonic framework of South China may have been established in the Indosinian orogeny (e.g., Zhang et al, 2013;Wang et al, 2013 and references therein). Closure of the Paleo-Tethyan and continental collision with the North China Block may have caused the nearly N-Sdirected crustal shortening across the SCB (Wang et al, 2021). Accordingly, Wang et al, 2013, Wang et al, 2021 proposed that WNW-/W-striking fault systems (e.g., Hechi-Liucheng, Turong-Jianyang, Nanling, Luoyuan-Mingxi, Xianyou-Zhangping, Fogang-Fengliang, Gaoyao-Huilai and Changjiang-Qionghai) and fold-and-thrust belts (e.g., Shimen-Linxiang, Anhua-Liuyang, Longshan-Liling, Jiuling, Wugongshan, Wudianmei and Guposhan-Huashan) may have developed since the Early Triassic across the SCB, based on petrographic, structural, and 40 Ar/ 39 Ar geochronologic evidence.…”

Section: Tectonic Evolutionmentioning

confidence: 99%

“…D 2 sinistral transpression is inferred to occur in the Yanshanian orogeny. NE-/NNE-striking ductile shear zones, thrusts, and fold belts have long been recognized across the SCB, and are attributed to the Paleo-Pacific subduction (e.g., Li and Li, 2007;Zhang and Cai, 2009;Wang et al, 2013, Wang et al, 2021Li et al, 2014). Older WNW-/W-striking structures were also reactivated.…”

Section: Tectonic Evolutionmentioning

confidence: 99%

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Meso-cenozoic tectonic evolution of the ziyun-luodian fault in SW China

Wang

et al. 2022

Front. Earth Sci.

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Regional-scale fault systems are important in adjusting intracontinental deformation. Closure of the Paleo-Tethys, Paleo-Pacific subduction, and India-continent-continent collision have all interacted to shape the Meso-Cenozoic tectonics of South China. The Ziyun-Luodian fault (ZLF) straddles across the Guizhou region in southwestern China. New petrographic and structural studies were conducted to reveal the structural evolution of the ZLF and regional deformation. At least three distinct deformation events are identified within the fault zone: During the Indosinian orogeny, dextral thrusting occurred along the ZLF, accompanied by moderate regional uplift in Guizhou, as evidenced by the Upper Triassic-Lower Jurassic disconformity. The main tectonic framework across Guizhou was established during the Yanshanian orogeny. Driven by the west-dipping Paleo-Pacific subduction (Middle Jurassic-Early Cretaceous), sinistral transpression occurred along the ZLF and NE-to N-S-trending fold belts in central-eastern Guizhou, and the NW-striking folds west of the ZLF were developed in under nearly E-W-directed compression. In the late Cenozoic, the ZLF may have undergone sinistral strike-slip movement, similar to the sinistral Ailaoshan-Red River shear zone. The Ziyun-Luodian fault plays an important role in accommodating the Meso-Cenozoic regional deformation in SW South China.

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Section: Frontiers In Earth Sciencementioning

confidence: 99%

Section: Frontiers In Earth Sciencementioning

confidence: 99%

Section: Frontiers In Earth Sciencementioning

confidence: 99%

Section: Tectonic Evolutionmentioning

confidence: 99%

Section: Tectonic Evolutionmentioning

confidence: 99%

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Meso-cenozoic tectonic evolution of the ziyun-luodian fault in SW China

Wang

et al. 2022

Front. Earth Sci.

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Low-temperature thermochronology data from the eastern South China Block decipher episodic subduction of the Paleo-Pacific Plate

Danišík

et al. 2021

Preprint

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Mesozoic subduction of the Paleo-Pacific Plate triggered intense tectonism, magmatism, and metallogeny in the eastern South China Block (E-SCB) and set off long-term tectonic, topographic, and climatic responses. However, contrasting hypotheses have been proposed to interpret the timing, style, and evolution of this oceanic subduction. Unraveling the exhumation history of the E-SCB is crucial to understanding deep subduction processes. To address the poorly documented exhumation history of the E-SCB, we present first zircon and apatite (U-Th)/He dates from eight Mesozoic granitoids distributed in a lateral profile across the intracontinental E-SCB. These data are combined with a compilation of regional thermochronological data, in order to address the evolution of the E-SCB in a tectonic, topographic, and climatic evolution framework. Zircon and apatite (U-Th)/He central ages of the investigated plutons range from 146-30 Ma and 82-31 Ma, respectively, implying long-lived exhumation of the intracontinental E-SCB. Inverse thermal modelling indicates the intracontinental SCB underwent multi-phase exhumation events from the Jurassic, despite variable onset timing and the fact that the far intracontinental E-SCB had been an exhumation center prior to the Early Cretaceous. In addition, a compilation map of regional thermochronological data reveals propagation of the exhumation center from the intracontinental to the epicontinental E-SCB over time (from the Cretaceous to the Paleogene). Based on these results, we propose a refined model of Paleo-Pacific Plate subduction since the Triassic. This model is in good agreement with geological observations in the E-SCB and capable of explaining regional magmatism, metallogeny, tectonism, and exhumation.Hosted file supporting information.docx available at https://authorea.com/users/529417/articles/597095low-temperature-thermochronology-data-from-the-eastern-south-china-block-decipherepisodic-subduction-of-the-paleo-pacific-plate

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Provenance shift during Early‐Middle Triassic and its response to the palaeogeographic and tectonic evolution of the southwestern South China Block

et al. 2022

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To constrain the relationship between the plate boundary dynamics and the basin sedimentation in the southwestern South China Block (SCB), we undertook detrital zircon U–Pb–Hf isotope compositions of the Lower‐Middle Triassic turbidite system in the Youjiang Basin and biotite 40Ar/39Ar thermochronology of the adjacent Lingshan granite. The detrital zircons from Lower Triassic clastic rocks are dominated by age peaks at ~450 Ma and ~1,000 Ma and minor peaks at ~250–260 Ma with negative εHf(t) values (−6.4 to −10.1). In contrast, the Middle Triassic group contains more volcanic fragments and displays a different age peak at ~240–287 Ma with εHf(t) between −11.9 and 13.2 in addition to the former two peaks. These results suggest a potential provenance associated with juvenile and volcanic components in the adjacent region during the Middle Triassic. A summary of the Triassic tectonothermal history suggests that the eastern Youjiang Basin and Yunkai Terrane were uplifted throughout the Triassic, while the northeastern Indochina Block on the west of the SCB was uplifted mainly during the Middle Triassic. Combined with the palaeocurrent reconstruction, we infer that the turbidite system was filled primarily from east to west during the Early Triassic, mainly controlled by the Palaeo‐Pacific plate subduction. Subsequently, the Middle Triassic turbidite system involved juvenile and volcanic components from the eastern SCB and northeastern Indochina Block in addition to the Early Triassic provenance, as a result of dual impact from the Palaeo‐Pacific plate subduction and Indochina Block collision.

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Triassic two-stage intra-continental orogensis of the South China Block, driven by Paleotethyan closure and interactions with adjoining blocks

Cited by 31 publications

References 70 publications

Meso-cenozoic tectonic evolution of the ziyun-luodian fault in SW China

Meso-cenozoic tectonic evolution of the ziyun-luodian fault in SW China

Low-temperature thermochronology data from the eastern South China Block decipher episodic subduction of the Paleo-Pacific Plate

Provenance shift during Early‐Middle Triassic and its response to the palaeogeographic and tectonic evolution of the southwestern South China Block

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