Neoproterozoic plate tectonic process and Phanerozoic geodynamic evolution of the South China Block

Shu, Liangshu; Yao, Jinlong; Wang, Bo; Faure, Michel; Charvet, Jacques; Chen, Yan

doi:10.1016/j.earscirev.2021.103596

Cited by 169 publications

(91 citation statements)

References 217 publications

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“…The high content of quartz and low content of lithic fragment indicate that the Cambrian to Silurian sequences possibly were deposited in a passive margin instead of a rift basin, in agreement with the Early Palaeozoic intracontinental tectonic setting of the South China Block (Cawood et al, 2007; Cawood, Wang, Xu, & Zhao, 2013; Shu et al, 2014, 2021; Y. Wang et al, 2010; Y. Xu et al, 2013; Xue et al, 2021; C. Yang et al, 2020). The Yidun Micro‐block was a continental sliver and rifted from the South China Block during the Late Palaeozoic (Figure 15a), in response to the opening of the Ganze‐Litang Ocean (Burchfiel & Chen, 2012; Chang, 2000; Tian et al, 2020).…”

Section: Interpretation and Discussionsupporting

confidence: 61%

Late Triassic foreland basin and Early Palaeozoic basement in the eastern Yidun Micro‐block and its tectonic implications for the eastern Palaeo‐Tethys

Xia

Chen

et al. 2021

Geological Journal

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Subduction polarity and collisional process are still controversial in the eastern Palaeo‐Tethys. On the basis of 1:50,000‐scale geological mapping at the Heni Township, zircon U–Pb geochronology and whole‐rock geochemistry were analysed for volcano‐sedimentary rocks in the eastern Yidun Micro‐block, Qinghai‐Tibet Plateau. Early Palaeozoic sequences were reported firstly in the eastern Yidun Micro‐block. Two populations of detrital zircon U–Pb ages (~525 Ma and 800–1,250 Ma) and deformation and metamorphic characteristics imply that the Early Palaeozoic sequences were deposited during the Cambrian to Silurian in the South China Block. The Early Palaeozoic sequences in the eastern Yidun Micro‐block were extruded by Cenozoic NW‐SE strike‐slip faults. Both the Late Triassic upper Tumugou and Lamaya formations yield four prominent peak ages of ~260 Ma, ~450 Ma, 750 ~ 780 Ma, and ~1,850 Ma. U–Pb ages of youngest detrital zircons (226.2 ± 1.0–224.7 ± 1.1 Ma), uppermost andestic tuff (216.1 ± 0.3 Ma) and intruded granitoids (~215 Ma) show that both the upper Tumugou and Lamaya formations were deposited during 225 ~ 216 Ma. Whole‐rock geochemistry indicates that all sandstone samples underwent moderate weathering and strong sorting and recycling. They were derived from felsic provenance, like volcano‐sedimentary rocks and granitoids in the western Yidun and Qiangtang micro‐blocks, indicative of pre‐Norian closure of the Jinshajiang Ocean. The closure gave rise to a foreland basin filled by the 225–216 Ma volcano‐sedimentary rocks in the eastern Yidun Micro‐block. The closure of the Jinshajiang Ocean also led to a scissor‐like closure of the Ganze‐Litang Ocean by clockwise rotation. Combining these with previous work, the Ganze‐Litang Ocean was a back‐arc basin resulted from eastward subduction of the Jinshajiang Ocean and had not undergone oceanic subduction.

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Section: Interpretation and Discussionsupporting

confidence: 61%

Late Triassic foreland basin and Early Palaeozoic basement in the eastern Yidun Micro‐block and its tectonic implications for the eastern Palaeo‐Tethys

Xia

Chen

et al. 2021

Geological Journal

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“…It is bounded by the Tibetan Plateau to the west, the North China Block to the north and the Cathaysia Block to the southeast. It was placed in a marginal position in Rodinia supercontinent and has underwent a long-term evolution and complex tectonic-magmatic processes in a continental margin setting during Neoproterozoic 11 – 13 . The western margin of the Yangtze Block became tectonically active since the early Neoproterozoic; it started with intra-oceanic arc magmatism before 971 ± 16 Ma (ref.…”

Section: Resultsmentioning

confidence: 99%

Rapid endogenic rock recycling in magmatic arcs

Tang

Lee

et al. 2021

Nat Commun

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In subduction zones, materials on Earth’s surface can be transported to the deep crust or mantle, but the exact mechanisms and the nature of the recycled materials are not fully understood. Here, we report a set of migmatites from western Yangtze Block, China. These migmatites have similar bulk compositions as forearc sediments. Zircon age distributions and Hf–O isotopes indicate that the precursors of the sediments were predominantly derived from juvenile arc crust itself. Using phase equilibria modeling, we show that the sediments experienced high temperature-to-pressure ratio metamorphism and were most likely transported to deep arc crust by intracrustal thrust faults. By dating the magmatic zircon cores and overgrowth rims, we find that the entire rock cycle, from arc magmatism, to weathering at the surface, then to burial and remelting in the deep crust, took place within ~10 Myr. Our findings highlight thrust faults as an efficient recycling channel in compressional arcs and endogenic recycling as an important mechanism driving internal redistribution and differentiation of arc crust.

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“…The South China block was formed by amalgamation of the Yangtze and Cathaysia blocks at c. 0.85 Ga, followed by anorogenic, rift-related magmatism at c. 820-740 Ma, centring around 850, 820, 800, 780 and 750 Ma, that are coeval with the breakup of the Rodinia supercontinent (e.g. Li et al 2008;Li et al 2009Li et al , 2014Yao et al 2014;Shu et al 2021). As suggested by Yao et al (2014;Fig.…”

Section: B2a Correlation Of Gondwanan Detrital Zircon Age Spectramentioning

confidence: 99%

New detrital zircon U–Pb insights on the palaeogeographic origin of the central Sanandaj–Sirjan zone, Iran

et al. 2021

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New detrital U–Pb zircon ages from the Sanandaj–Sirjan metamorphic zone in the Zagros orogenic belt allow discussion of models of the late Neoproterozoic to early Palaeozoic plate tectonic evolution and position of the Iranian microcontinent within a global framework. A total of 194 valid age values from 362 zircon grains were obtained from three garnet-micaschist samples. The most abundant detrital zircon population included Ediacaran ages, with the main age peak at 0.60 Ga. Other significant age peaks are at c. 0.64–0.78 Ga, 0.80–0.91 Ga, 0.94–1.1 Ga, 1.8–2.0 Ga and 2.1–2.5 Ga. The various Palaeozoic zircon age peaks could be explained by sediment supply from sources within the Iranian microcontinent. However, Precambrian ages were found, implying a non-Iranian provenance or recycling of upper Ediacaran–Palaeozoic clastic rocks. Trace-element geochemical fingerprints show that most detrital zircons were sourced from continental magmatic settings. In this study, the late Grenvillian age population at c. 0.94–1.1 Ga is used to unravel the palaeogeographic origin of the Sanandaj–Sirjan metamorphic zone. This Grenvillian detrital age population relates to the ‘Gondwana superfan’ sediments, as found in many Gondwana-derived terranes within the European Variscides and Turkish terranes, but also to units further east, e.g. in the South China block. Biogeographic evidence proves that the Iranian microcontinent developed on the same North Gondwana margin extending from the South China block via Iran further to the west.

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Neoproterozoic plate tectonic process and Phanerozoic geodynamic evolution of the South China Block

Cited by 169 publications

References 217 publications

Late Triassic foreland basin and Early Palaeozoic basement in the eastern Yidun Micro‐block and its tectonic implications for the eastern Palaeo‐Tethys

Late Triassic foreland basin and Early Palaeozoic basement in the eastern Yidun Micro‐block and its tectonic implications for the eastern Palaeo‐Tethys

Rapid endogenic rock recycling in magmatic arcs

New detrital zircon U–Pb insights on the palaeogeographic origin of the central Sanandaj–Sirjan zone, Iran

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