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学科主题: 地球科学::地质学
题名: Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision
作者: Huangfu, P (Huangfu, Pengpeng)1, 2, 3; Wang, YJ (Wang, Yuejun)3, 4; Li, ZH (Li, Zhonghai)2; Fan, WM (Fan, Weiming)4; Zhang, Y (Zhang, Yan)3
通讯作者: Zhang, Y
关键词: BENEATH SOUTHERN TIBET ; CONTINENTAL SUBDUCTION ; LITHOSPHERE BENEATH ; TECTONIC EVOLUTION ; DRIVING MECHANISM ; MANTLE ; BELT ; MAGMATISM ; HIMALAYA ; UPLIFT
刊名: JOURNAL OF EARTH SCIENCE
发表日期: 2016
DOI: 10.1007/s12583-016-0701-9
卷: 27, 期:5, 页:727-739
收录类别: SCI
合作性质: 国内
文章类型: Article
英文摘要: 2D thermo-mechanical models are constructed to investigate the effects of oceanic and continental crustal eclogitization on plate dynamics at three successive stages of oceanic subduction, slab breakoff, and continental subduction. Crustal eclogitization directly increases the average slab density and accordingly the slab pull force, which makes the slab subduct deeply and steeply. Numerical results demonstrate that the duration time from initial continental collision to slab breakoff largely depends on the slab pull force. Specifically, eclogitization of subducted crust can greatly decrease the duration time, but increase the breakoff depth. The detachment of oceanic slab from the pro-continental lithosphere is accompanied with obvious exhumation of the subducted continental crust and a sharp uplift of the collision zone in response to the disappearance of downward drag force and the induced asthenospheric upwelling, especially under the condition of no or incomplete crustal eclogitization. During continental subduction, the slab dip angle is strongly correlated with eclogitization of subducted continental lower crust, which regulates the slab buoyancy nature. Our model results can provide several important implications for the Himalayan-Tibetan collision zone. For example, it is possible that the lateral variations in the degree of eclogitization of the subducted Indian crust might to some extent contribute to the lateral variations of subduction angle along the Himalayan orogenic belt. Moreover, the accumulation of highly radiogenic sediments and upper continental crustal materials at the active margin in combination with the strong shear heating due to continuous continental subduction together cause rising of isotherms in the accretionary wedge, which facilitate the development of crustal partial melting and metamorphism.
语种: 英语
WOS记录号: WOS:000384708700001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7590
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China
3.Sun Yat Sen Univ, Sch Earth Sci & Geol Engn, Guangzhou 510275, Guangdong, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Ctr Excellence Tibetan Plateau Earth Sci, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China

Recommended Citation:
Huangfu, P ,Wang, YJ ,Li, ZH ,et al. Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision[J]. JOURNAL OF EARTH SCIENCE,2016,27(5):727-739.
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