A review on the numerical geodynamic modeling of continental subduction, collision and exhumation

doi:10.1007/s11430-013-4696-0

	A review on the numerical geodynamic modeling of continental subduction, collision and exhumation
	Li ZhongHai
刊名	SCIENCE CHINA-EARTH SCIENCES
	2014
卷号	57 期号:1 页码:47-69
关键词	continental subduction collision exhumation HP-UHP numerical modeling
ISSN号	1674-7313
DOI	10.1007/s11430-013-4696-0
英文摘要	Continental subduction and collision normally follows oceanic subduction, with the remarkable event of formation and exhumation of high-to ultra-high-pressure (HP-UHP) metamorphic rocks. Based on the summary of numerical geodynamic models, six modes of continental convergence have been identified: pure shear thickening, folding and buckling, one-sided steep subduction, flat subduction, two-sided subduction, and subducting slab break-off. In addition, the exhumation of HP-UHP rocks can be formulated into eight modes: thrust fault exhumation, buckling exhumation, material circulation, overpressure model, exhumation of a coherent crustal slice, episodic ductile extrusion, slab break-off induced eduction, and exhumation through fractured overriding lithosphere. During the transition from subduction to exhumation, the weakening and detachment of subducted continental crust are prerequisites. However, the dominant weakening mechanisms and their roles in the subduction channel are poorly constrained. To a first degree approximation, the mechanism of continental subduction and exhumation can be treated as a subduction channel flow model, which incorporates the competing effects of downward Couette (subduction) flow and upward Poiseuille (exhumation) flow in the subduction channel. However, the (de-)hydration effect plays significant roles in the deformation of subduction channel and overriding lithosphere, which thereby result in very different modes from the simple subduction channel flow. Three-dimensionality is another important issue with highlighting the along-strike differential modes of continental subduction, collision and exhumation in the same continental convergence belt.
学科主题	构造地质学
WOS关键词	PRESSURE METAMORPHIC ROCKS ; CONVERGENT PLATE MARGINS ; HINDU-KUSH REGION ; P-T PATHS ; ULTRAHIGH-PRESSURE ; SEDIMENT SUBDUCTION ; TIBETAN PLATEAU ; MELANGE FORMATION ; PRISM ACCRETION ; EASTERN CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000329184900006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40522]
专题	中国地质科学院地质研究所
作者单位	Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Li ZhongHai. A review on the numerical geodynamic modeling of continental subduction, collision and exhumation[J]. SCIENCE CHINA-EARTH SCIENCES,2014,57(1):47-69.
APA	Li ZhongHai.(2014).A review on the numerical geodynamic modeling of continental subduction, collision and exhumation.SCIENCE CHINA-EARTH SCIENCES,57(1),47-69.
MLA	Li ZhongHai."A review on the numerical geodynamic modeling of continental subduction, collision and exhumation".SCIENCE CHINA-EARTH SCIENCES 57.1(2014):47-69.