Late Cretaceous-Cenozoic exhumation of the southeastern margin of Coastal Mountains, SE China, revealed by fission-track thermochronology: Implications for the topographic evolution

Li, Xiaoming; Zou, Heping

doi:10.1016/j.sesci.2017.02.001

Cited by 21 publications

(10 citation statements)

References 47 publications

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“…Following the Oligocene erosion in far eastern China, the modelled hot asthenospheric material spreads further westward into the SCB during the Miocene. Along with the coeval intraplate volcanism in this region (Gong and Chen, 2014), this coincides temporally with a regional erosion event inferred from numerous AFT studies (e.g., Yan et al, 2009;Li and Zou, 2017;Wang Y. et al, 2020;Qiu et al, 2020). Recent reports by Stephenson et al (2021) suggest the SCB to be dynamically uplifted by ~1 km at present, which is consistent with the seismically slow anomalies observed below this region (e.g., He and Santosh, 2021).…”

Section: The South China Blocksupporting

confidence: 80%

“…Comparison between the dynamic topography predictions of the mantle circulation models of Lin et al (2020) and the AFT-derived cooling histories published by Wang Y. et al (2020), Yan et al (2009) and Li and Zou (2017). Notice the poorer fit of Models 1a & 1b, in particular for samples closer to the Ryukyu Trench.…”

Section: Figurementioning

confidence: 83%

“…A significant rapid cooling event during the Oligocene and Miocene has been found consistently in numerous studies (see those compiled by Qiu et al, 2020), with samples covering a large (~1,000,000 km 2 ) region. To test whether this regionalscale erosion of the SCB during the late Cenozoic is linked to the dynamic uplift expected under our hypothesis, we compare the dynamic topography predictions of each model to the AFT-derived cooling histories published by Wang Y. et al (2020), Yan et al (2009), and Li and Zou, (2017). A total of 21 samples are considered, of which 9 have been reported in Figure 7 to highlight key characteristics in different regions.…”

Section: Aft Comparisonsmentioning

confidence: 97%

“…The SCB has garnered significant attention from thermochronological studies (e.g., Yan et al, 2009;Wang et al, 2015;Li and Zou, 2017;Su et al, 2017;Tao et al, 2019;Wang Y. et al, 2020;Qiu et al, 2020), likely due to the regional history of exhumation inferred from the widespread present-day exposure of Mesozoic and Paleozoic rocks. That this exhumation has continued into the Cenozoic is revealed by the exposure of late Cretaceous granites formed during the flat-slab subduction of the Izanagi plate (Charvet et al, 1994), indicating at least kilometre-scale erosion has occurred during the Cenozoic (Yan Y. et al, 2018).…”

Section: Aft Comparisonsmentioning

confidence: 99%

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Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

2022

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The tectonics of East Asia are notoriously complex. Consisting of an intricate patchwork of microplates and accreted terranes, even the Cenozoic tectonic history of the region remains controversial, and many differing reconstructions have been proposed. While the exact kinematics remain poorly constrained, it is generally accepted that East Asia has been characterised by a long history of subduction and downwelling. However, numerous geological observations, at a first glance, appear to lie in stark contrast to this history. For example, seismically slow anomalies in the uppermost mantle are extensive in this region and coincide spatially with widespread intraplate volcanism since the latest Paleogene, which is seemingly at odds with the cold upper mantle and downwelling flow expected from a history of subduction. Here, we propose a solution to this paradox, in which hot asthenospheric material flows through the slab window opened by the subduction of the Izanagi-Pacific ridge during the early Cenozoic, passing from the Pacific domain into East Asia. To investigate this hypothesis, we compare several independent geological observations to the asthenospheric flow predicted by a suite of recently published global mantle circulation models. The timing and location of intraplate volcanism is compared with the predicted distribution of this hot material through time, while observations linked to uplift and erosion are compared to the changes in dynamic topography that it induces. These include the widespread late Eocene–Oligocene sedimentary hiatus in far eastern China and the regional erosion of the South China Block since the Miocene inferred from Apatite Fission Track Thermochronology studies. The westward influx of hot asthenospheric material is a robust feature in the models, being predicted regardless of the implemented Cenozoic tectonic reconstruction. However, we find that a small Philippine Sea Plate that overrides a marginal “vanished ocean” during the late Cenozoic provides an optimal fit to the geological observations considered. Flow of hot asthenospheric material through gaps in subduction has the potential to significantly affect the geodynamic and geologic history of backarc and hinterland regions, and might have been a recurring phenomenon throughout Earth’s history. However, further research will be required in order to establish this.

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Section: The South China Blocksupporting

confidence: 80%

Section: Figurementioning

confidence: 83%

Section: Aft Comparisonsmentioning

confidence: 97%

Section: Aft Comparisonsmentioning

confidence: 99%

See 2 more Smart Citations

Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

2022

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“…An Andean‐type South China margin formed by the subduction of the Paleo‐Pacific Plate during the Jurassic–Cretaceous (Gilder et al, 1996; Li et al, 2018; Suo et al, 2019). Paleogeographic reconstructions based on climate data preserved in the stratigraphic record (Chen, 2000; Hasegawa et al, 2012), fossil records (Hao et al, 2017; Jin, 2009), thermochronology (Li & Zou, 2017), isotope‐based paleoaltimetry (Zhang et al, 2016), and paleo‐topographic modelling (Liu et al, 2020; Suo et al, 2019) suggest that a significant mountain range, characterised by extensive Yanshanian (Jurassic–Cretaceous) magmatism existed along the South China margin in the Late Mesozoic‐Early Cenozoic but has since collapsed due to pronounced crustal extension. This former high landform was the Cathaysian coastal orogenic range (Chen, 1997; Zou, 2001) defined as a series of northeast‐trending, ca.…”

Section: Introductionmentioning

confidence: 99%

Detrital zircons record the evolution of the Cathaysian Coastal Mountains along the South China margin

et al. 2021

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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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Late Cretaceous-Cenozoic exhumation of the southeastern margin of Coastal Mountains, SE China, revealed by fission-track thermochronology: Implications for the topographic evolution

Cited by 21 publications

References 47 publications

Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

Detrital zircons record the evolution of the Cathaysian Coastal Mountains along the South China margin

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

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