气候变化领域集成服务门户(CCPortal): Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision

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DOI	10.1007/s12583-016-0701-9
	Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision
	Huangfu, Pengpeng; Wang, Yuejun; Li, Zhonghai; Fan, Weiming; Zhang, Yan
通讯作者	Zhang, Y (通讯作者)
发表日期	2016
ISSN	1674-487X
EISSN	1867-111X
起始页码	727
结束页码	739
卷号	27 期号:5
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.
关键词	BENEATH SOUTHERN TIBET CONTINENTAL SUBDUCTION LITHOSPHERE BENEATH TECTONIC EVOLUTION DRIVING MECHANISM MANTLE BELT MAGMATISM HIMALAYA UPLIFT
英文关键词	numerical modeling; crustal eclogitization; oceanic subduction; slab breakoff; continental subduction; Himalayan-Tibetan collision zone
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000384708700001
来源期刊	JOURNAL OF EARTH SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258736
推荐引用方式 GB/T 7714	Huangfu, Pengpeng,Wang, Yuejun,Li, Zhonghai,et al. Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision[J]. 中国科学院青藏高原研究所,2016,27(5).
APA	Huangfu, Pengpeng,Wang, Yuejun,Li, Zhonghai,Fan, Weiming,&Zhang, Yan.(2016).Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision.JOURNAL OF EARTH SCIENCE,27(5).
MLA	Huangfu, Pengpeng,et al."Effects of Crustal Eclogitization on Plate Subduction/Collision Dynamics: Implications for India-Asia Collision".JOURNAL OF EARTH SCIENCE 27.5(2016).