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Featured researches published by Xin-Shui Wang.


Science China-earth Sciences | 2016

A subduction channel model for exhumation of oceanic-type high-pressure to ultrahigh-pressure eclogite-facies metamorphic rocks in SW Tianshan, China

Ji-Lei Li; Jun Gao; Xin-Shui Wang

High-pressure (HP) and ultrahigh-pressure (UHP) eclogites exposed in collisional orogens are widely regarded to record the history of crustal rocks that were subducted to mantle depths and exhumed back to the surface. Insight into subduction and exhumation processes plays an important role in understanding the nature and evolution of subduction zones, geodynamics and plate tectonics. In contrast to continental-type HP to UHP metamorphic rocks that are dominated by felsic lithology, oceanic-type HP to UHP metamorphic rocks are dominated by mafic eclogites and thus have greater density, and their exhumation needs to overcome large barriers and may involve complicated tectonic processes. The exhumation of HP to UHP rocks is mainly influenced by the internal buoyancy, however, the external tectonic forces (such as channel flow) also act as effective exhumation drivers; in addition, effects of tectonic settings (such as slab rollback and breakoff) should take into account. The HP-UHP metamorphic terrane in Southwestern Tianshan, which mainly comprises of metasediments with interlayered metamafic lenses and blocks, represents a typical accretionary mélange associated with deep subduction of oceanic crust. However, the exhumation mechanisms of these once deeply buried HP-UHP rocks are still under discussion. Based on the field occurrences, petrographic features, peak metamorphic P-T conditions and ages of the eclogites/blueschists and their metasedimentary country rocks, a “sediment-type subduction channel” model is advocated in this study to appraise/decipher the formation and evolution of Southwestern Tianshan HP-UHP metamorphic belt. Poly-cyclic metamorphic eclogites record the multistage burial-exhumation cycling manipulated by convective flow in a channel-like interface between the plates, giving robust evidence for the presence of a subduction channel. In addition, this study summarizes some remaining geotectonic problems and research perspectives concerning the Southwestern Tianshan HP-UHP metamorphic belt.


International Geology Review | 2018

P–T–time (phengite Ar closure) history of spatially close-outcropping HP and UHP oceanic eclogites (southwestern Tianshan): implication for a potential deep juxtaposing process during exhumation?

Zhou Tan; Jun Gao; Tuo Jiang; Xin-Shui Wang; Xi Zhang

ABSTRACT The Chinese southwestern Tianshan HP–UHP/LT metamorphic complex possesses well-preserved mafic layers, tectonic slices/blocks, boudins/lens of different sizes, and lithology embedded within dominant metavolcanoclastics. A recent study on the ultra-high pressure (UHP) eclogite revealed a short timescale of exhumation (≤10 Ma, ~315 ± 5 Ma). However, controversies still exist on some key questions: (1) the reasonable interpretation of spatially close-outcropped high pressure (HP) and UHP slices with respect to regional geodynamics, and (2) if the previous regional scatter Ar–Ar ages proved the existence of internally coherent sub-belts or troubled by dating on samples with notable 40Ar retention. This study focusses on detailed P–T–time (phengite Ar closure) recovery of samples from a HP eclogite lens and its host rock, the UHP thick-layered eclogite. Based on data from bulk–rock, microprobe analysis, and muscovite Ar–Ar chronological dating, we link phengite growth to potential garnet growth stages via thermodynamic modelling. Facilitated by the P–T–Ar retention% graph, we collect all the regional muscovite Ar–Ar data together with results in this study for evaluating the significance of regional muscovite Ar–Ar ages and set back to geodynamics. According to modelling results, the HP lens eclogite reached peak metamorphism at ~550°C, 2.50 GPa with an Ar–Ar muscovite plateau age of 316.9 ± 1.0 Ma that could date the mass phengite growth event during prograde metamorphism. In contrast, the UHP layered eclogite experienced UHP peak burial at ~510°C, 2.95 GPa, and then to HP peak metamorphism at ~560°C, 2.60 GPa with ~311.6 ± 0.7 Ma plateau age that may constrain the cooling age during early exhumation. Noteworthy, both of them share a quite similar early exhumation path despite bearing contrasting prograde metamorphic experiences. With considering updated regional exhumation pattern, this might imply the existence of a potential deep juxtaposing (capture) process between HP slices and exhumating UHP complex, at about 45–60 km depth along subduction plate interface.


Tectonophysics | 2014

Paleozoic ophiolitic mélanges from the South Tianshan Orogen, NW China: Geological, geochemical and geochronological implications for the geodynamic setting

Tuo Jiang; Jun Gao; Reiner Klemd; Qing Qian; Xi Zhang; Xianming Xiong; Xin-Shui Wang; Zhou Tan; Bangxue Chen


Journal of Asian Earth Sciences | 2015

Record of assembly and breakup of Rodinia in the Southwestern Altaids: Evidence from Neoproterozoic magmatism in the Chinese Western Tianshan Orogen

Jun Gao; Xin-Shui Wang; Reiner Klemd; Tuo Jiang; Qing Qian; Li-Xiu Mu; Yu-Zhou Ma


Precambrian Research | 2014

Geochemistry and geochronology of the Precambrian high-grade metamorphic complex in the Southern Central Tianshan ophiolitic mélange, NW China

Xin-Shui Wang; Jun Gao; Reiner Klemd; Tuo Jiang; Ji-Lei Li; Xi Zhang; Zhou Tan; Le Li; Zhixin Zhu


Journal of Asian Earth Sciences | 2017

Large-scale porphyry-type mineralization in the Central Asian metallogenic domain: A review

Jun Gao; Reiner Klemd; Mingtian Zhu; Xin-Shui Wang; Ji-Lei Li; Bo Wan; Wenjiao Xiao; Qingdong Zeng; Ping Shen; Jing-Gui Sun; Kezhang Qin; Eduardo Campos


Journal of Asian Earth Sciences | 2015

Metallogenesis of the Zhibo and Chagangnuoer volcanic iron oxide deposits in the Awulale Iron Metallogenic Belt, Western Tianshan orogen, China

Xi Zhang; Reiner Klemd; Jun Gao; Lianhui Dong; Xin-Shui Wang; Karsten M. Haase; Tuo Jiang; Qing Qian


Lithos | 2015

Early Neoproterozoic multiple arc–back-arc system formation during subduction–accretion processes between the Yangtze and Cathaysia blocks: New constraints from the supra-subduction zone NE Jiangxi ophiolite (South China)

Xin-Shui Wang; Jun Gao; Reiner Klemd; Tuo Jiang; Qing-Guo Zhai; Xu-Chang Xiao; Xinquan Liang


Lithos | 2017

The tectonic evolution of the Irtysh tectonic belt: New zircon U–Pb ages of arc-related and collisional granitoids in the Kalaxiangar tectonic belt, NW China

Tao Hong; Reiner Klemd; Jun Gao; Peng Xiang; Xing-Wang Xu; Jun You; Xin-Shui Wang; Chu Wu; Hao Li; Qiang Ke


Lithos | 2017

P–T–time-isotopic evolution of coesite-bearing eclogites: Implications for exhumation processes in SW Tianshan

Zhou Tan; Philippe Agard; Jun Gao; Timm John; Ji-Lei Li; Tuo Jiang; Léa Bayet; Xin-Shui Wang; Xi Zhang

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Jun Gao

Chinese Academy of Sciences

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Tuo Jiang

Chinese Academy of Sciences

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Reiner Klemd

University of Erlangen-Nuremberg

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Ji-Lei Li

Chinese Academy of Sciences

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Xi Zhang

Chinese Academy of Sciences

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Zhou Tan

Chinese Academy of Sciences

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Qing Qian

Chinese Academy of Sciences

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Sheng-Chao Xue

China University of Geosciences

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Kezhang Qin

Chinese Academy of Sciences

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Timm John

Free University of Berlin

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