Evolution of the Tethyan Bangong-Nujiang Ocean and its SE Asian connection: Perspective from the Early Cretaceous high-Mg granitoids in SW China

Ma, Pengfei; Xia, Xiaoping; Lai, Chun‐Kit; Cai, Keda; Cui, Zexian; Xu, Jian; Le, Zhang; Yang, Qing

doi:10.1016/j.lithos.2021.106074

Cited by 6 publications

(2 citation statements)

References 70 publications

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“…Despite some zircon ε Hf ( t ) values are up to +10, the averaged zircon ε Hf ( t ) values lower than −5 suggest that most of their primary magmas in which these zircons were crystalized were derived from the partial melting of the ancient crust (Figure 3a) (Y. Chen et al., 2014; P.‐F. Ma et al., 2021; R.‐Z. Zhu et al., 2020).…”

Section: Summary Of the Northern And Southern Magmatic Beltsmentioning

confidence: 99%

Spatiotemporal Variation of the Cretaceous‐Eocene Arc Magmatism in Lhasa‐Tengchong Terrane

Liu,

Fan,

Peng

et al. 2024

Geophysical Research Letters

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It was recognized that two magmatic belts in the Lhasa‐Tengchong terrane formed due to the Mesozoic‐Cenozoic Tethyan evolution. Still, their spatiotemporal variations of magmatic flare‐ups/lulls are rarely discussed. Here we use the new U‐Pb and Lu‐Hf isotopic data of captured zircons and a comprehensive data set to show that the flare‐up of northern magmatic belt has peak ages of 110 Ma in central and northern Lhasa and 120 Ma in eastern Tengchong, possibly related to the tectonic transition from Meso‐ and Neo‐Tethyan double subduction to Neo‐Tethyan single subduction. For the southern magmatic belt, the flare‐ups at 100–85 Ma and 65–45 Ma in eastern southern Lhasa indicate obvious juvenile crustal growth, while flare‐ups at 75–45 Ma in western southern Lhasa and Tengchong record ancient crustal reworking. Such flare‐up variations in the southern magmatic belt possibly resulted from asynchronous changes in the Neo‐Tethyan slab dip.

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Section: Summary Of the Northern And Southern Magmatic Beltsmentioning

confidence: 99%

Spatiotemporal Variation of the Cretaceous‐Eocene Arc Magmatism in Lhasa‐Tengchong Terrane

Liu,

Fan,

Peng

et al. 2024

Geophysical Research Letters

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“…The Late Cretaceous magmatic rocks are mainly exposed at Guyong, Husa, Jiucheng and Sudian area, and they are shoshonitic diorite and high-K calc-alkaline granitegranodiorite in compositions (Xu et al, 2012;Cao et al, 2016;Zhao S W et al, 2017aZhao S W et al, , 2020Zhu R Z et al, 2021). The early Eocene magmatic rocks are mainly occurred at Xima-Tongbiguan, Nabang and Bangwan area, which are Data from Cong et al, 2011;Qi et al, 2011;Chen et al, 2014;Zhu R Z et al, 2015Zhu R Z et al, , 2017aZhu R Z et al, , b, 2018a, 2020aCao et al, 2016Cao et al, , 2017Xie et al, 2016Xie et al, , 2020Zhao S W et al, 2016Zhao S W et al, , 2017aZhao S W et al, , 2019Zhao S W et al, , 2020Ma et al, 2021b. calc-alkaline to high-K calc-alkaline granite-granodioritequartz diorite-gabbro in compositions (Zhao S W et al, 2016(Zhao S W et al, , 2019.…”

Section: Possible Geodynamic Process For the Qinling Triassic Granitesmentioning

confidence: 99%

Granitic Magmatism in Eastern Tethys Domain (Western China) and their Geodynamic Implications

Lai

Zhu

Qin

et al. 2022

Acta Geologica Sinica (Eng)

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Western China locates in the eastern section of the Tethys domain, granitic rocks in this region with variable formation ages and geochemistry record key information about the crust‐mantle structure and thermal evolution during the convergent process of Tethys. In this study, we focus on some crucial granitic magmatism in the western Yangtze, Qinling orogen, and western Sanjiang tectonic belt, where magma sequence in the convergent orogenic belt can provide important information about the crust‐mantle structure, thermal condition and melting regime that related to the evolution processes from Pre‐ to Neo‐Tethys. At first, we show some features of Pre‐Tethyan magmatism, such as Neoproterozoic magmatism (ca. 870–740 Ma) in the western margin of the Yangtze Block were induced by the assembly and breakup of the Rodinia supercontinent. The complication of voluminous Neoproterozoic igneous rocks indicated that the western Yangtze Block underwent the thermodynamic evolution from hot mantle‐cold crust stage (ca. 870–850 Ma) to hot mantle and crust stage (ca. 850–740 Ma). The Neoproterozoic mantle sources beneath the western Yangtze Block were progressively metasomatized by subduction‐related compositions from slab fluids (initial at ca. 870 Ma), sediment melts (initial at ca. 850 Ma), to oceanic slab melts (initial at ca. 825–820 Ma) during the persistent subduction process. Secondly, the early Paleozoic magmatism can be well related to three distinctive stages (variable interaction of mantle‐crust to crustal melting to variable sources) from an Andeans‐type continental margin to collision to extension in response to the evolution of Proto‐Tethys and final assembly of Gondwana continent. Thirdly, the Paleo‐Tethys magmatism, Triassic granites in the Qinling orogenic display identical formation ages and Lu‐Hf isotopic compositions with the related mafic enclaves, indicate a coeval melting event of lower continental crust and mantle lithosphere in the Triassic convergent process and a continued hot mantle and crust thermal condition through the interaction of subducted continental crust and upwelling asthenosphere. Finally, the Meso‐ and Neo‐Tethyan magmatism: Early Cretaceous magmatism in the Tengchong Block are well responding to the subduction and closure of Bangong‐Nujiang Meso‐Tethys, recycled sediments metasomatized mantle by subduction since 130 Ma and subsequently upwelling asthenosphere since ca. 122 Ma that causes melting of heterogeneous continental crust until the final convergence, this process well recorded the changing thermal condition from hot mantle‐cold crust to hot mantle and crust; The Late Cretaceous to Early Cenozoic magmatism well recorded the processes from Neo‐Tethyan ocean slab flat subduction, steep subduction, to initial collision of India‐Asia, it resulted in a series of continental arc magmatism with enriched mantle to crustal materials at Late Cretaceous, increasing depleted and/or juvenile materials at the beginning of early Cenozoic, and increasing evolved crustal materials in the ...

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Regional Metallogenic Models

Li,

Pan,

Hou

et al. 2023

The China Geological Survey Series

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Evolution of the Tethyan Bangong-Nujiang Ocean and its SE Asian connection: Perspective from the Early Cretaceous high-Mg granitoids in SW China

Cited by 6 publications

References 70 publications

Spatiotemporal Variation of the Cretaceous‐Eocene Arc Magmatism in Lhasa‐Tengchong Terrane

Spatiotemporal Variation of the Cretaceous‐Eocene Arc Magmatism in Lhasa‐Tengchong Terrane

Granitic Magmatism in Eastern Tethys Domain (Western China) and their Geodynamic Implications

Regional Metallogenic Models

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