Late Carboniferous to Early Permian oceanic subduction in central Inner Mongolia and its correlation with the tectonic evolution of the southeastern Central Asian Orogenic Belt

Chai, Hui; Ma, Yanwei; Santosh, M.; Sheng, Hao; Luo, Tongwei; Fan, Dongqian; Gao, Bo; Zong, Lebin; Hao, Ming C.; Wang, Qingfei

doi:10.1016/j.gr.2020.02.016

Cited by 13 publications

(7 citation statements)

References 72 publications

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“…B. et al 2010Zhou, J. B. et al , 2018Wilde, 2015;Eizenhöfer & Zhao, 2018;Chai et al 2020;Liu et al 2021;Hui et al 2021;Wu et al 2021). The NE China region in the southeastern segment of the CAOB (Fig.…”

Section: Geological Background and Sample Descriptionsmentioning

confidence: 98%

“…B. et al 2010Zhou, J. B. et al , 2018Wilde, 2015;Eizenhöfer & Zhao, 2018;Chai et al 2020). However, the proposed hypotheses favoured that the suturing took place in the Middle Devonian to Carboniferous (Tang, 1990;Xu et al 2013Xu et al , 2015Zhao et al 2013Zhao et al , 2020, early 1522 Y Jing et al…”

Section: B the Late Palaeozoic Geodynamic Evolution Of The Eastern Pa...mentioning

confidence: 99%

“…Previous studies have revealed that the geodynamic evolution of the CAOB is controlled by subduction, accretion, and closure processes of the Palaeo-Asian Ocean, involving a series of ophiolites, accretionary wedges, accretionary complexes, magmatic arcs, oceanic plateaus and micro-continental blocks (Fig. 1a; Sengör et al 1993;Jahn et al 2000;Badarch et al 2002;Windley et al 2007;Zhou et al 2010;Wu et al 2011;Xiao et al 2015;Wilde, 2015;Eizenhöfer & Zhao, 2018;Chai et al 2020;Hui et al 2021;Yang et al 2022). Along with the consumption and final closure of the Palaeo-Asian Ocean, the CAOB was ultimately assembled along the northern margin of the Tarim and North China cratons (Xiao et al 2015;Eizenhöfer & Zhao, 2018;Hui et al 2021).…”

Section: Introductionmentioning

confidence: 96%

“…B. et al 2010Zhou, J. B. et al , 2018Wilde, 2015;Eizenhöfer & Zhao, 2018;Chai et al 2020;Liu et al 2021;Hui et al 2021). Previous studies have revealed that the geodynamic evolution of the CAOB is controlled by subduction, accretion, and closure processes of the Palaeo-Asian Ocean, involving a series of ophiolites, accretionary wedges, accretionary complexes, magmatic arcs, oceanic plateaus and micro-continental blocks (Fig.…”

Section: Introductionmentioning

confidence: 98%

“…B. et al 2010Zhou, J. B. et al , 2018Wilde, 2015;Eizenhöfer & Zhao, 2018;Chai et al 2020;Liu et al 2021). Since typical collision-related features do not develop, the detailed geodynamic processes involved in the final closure are controversial and ocean closure time is uncertain, with it spanning from Devonian to Middle Triassic times.…”

Section: Introductionmentioning

confidence: 99%

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Late Palaeozoic tectonic evolution of the eastern Palaeo-Asian Ocean: new evidence from the early Permian arc magmatic suites in the Kulun region

Jing

Yang

et al. 2022

Geol. Mag.

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Late Palaeozoic igneous rock associations in response to subduction, accretion, and final closure of the eastern Palaeo-Asian Ocean play a significant role in understanding the geodynamic evolution of the southeastern Central Asian Orogenic Belt. Previous studies have identified a Permian arc magmatic belt associated with the southward-dipping subduction of the eastern Palaeo-Asian Ocean along the Solonker–Changchun suture zone. The genetic mechanism and associated geodynamic settings are of great importance in deciphering the evolution of the eastern Palaeo-Asian Ocean. This paper presents zircon U–Pb–Hf isotope and whole-rock geochemical analyses for a suite of magmatic rocks including the early Permian diorite porphyrites (ca. 281.0 Ma), andesites (ca. 276 Ma) and rhyolites (ca. 275 Ma) in the Kulun region. The diorite porphyrites and andesites have high SiO2 and total alkali contents, and low MgO contents and Mg no. values, with enrichments in large ion lithophile elements and depletions in high-field-strength elements. These geochemical characteristics, together with low-Sr and high-Yb contents, a weak concave-upward shape of middle rare earth elements and negative Eu anomalies, suggest that these intermediate igneous rocks were generated by partial melting of amphibolitic lower crust at a crustal depth of 30–40 km. The rhyolites have heterogeneous isotopic compositions, with ϵHf(t) values and TDM2 ages of –20.8 to +0.5 and 3578∼1494 Ma, implying that they were likely derived from partial melting of a mixed source dominated by recycled ancient crust with minor juvenile crustal materials. The rhyolites show potassic affinity with relatively high K2O and very low Na2O, which was attributed to liquid immiscibility of felsic magma and subsequent limited fractional crystallization of plagioclase. The regional igneous associations, metamorphic events, and coeval sedimentary rocks along the Solonker–Changchun suture zone indicate that the early Permian igneous rocks were formed in an active continental arc environment in response to southward subduction of the eastern Palaeo-Asian Ocean.

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