A model of delamination of continental lower crust.

	A model of delamination of continental lower crust.
	Zhang, Q; Jin, WJ; Wang, YL; Li, CD; Wang, Y; Jia, XQ
刊名	ACTA PETROLOGICA SINICA
	2006
卷号	22 期号:2 页码:#REF!
关键词	continental lower crust delamination adakite lithospheric mantle ashospheric mantle
通讯作者	Zhang, Q (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China.
英文摘要	It is the subject that people pay attention to continental lower crust delamination. The paper puts out that there are at least three conditions for lower crust delamination: (1) the thickened crust is the prerequisite that the delamination make the lower Crust eclogite. (2) the extensive magma shifts Out a large amount of low density acid magma, enables the crust density to be greater than the mantle density. Because the lower crust eclogitation and some magma melting are of the geochemistry characteristics of adakite, the lower crust delamination is the prerequisite and essential condition with the extensive adakite melted out. (3) that the lithosphere mantle transfers into the asthenoshpere mantle enables the lower crust into mantle. The mantle under continent crust is cold and rigidity originally, difficult to flow, and will be soften with heat and water joining, make into the asthenosphere heat, plasticity and easy flow. So that the transition between the lithosphere mantle and the asthenosphere mantle is the essential factor and precondition of the lower crust delamination. The author thinks that the crust will not delaminate as a wholly, otherwise, it will delaminate as the snow flake float probably. If the density of the lower crust is reduced (lower than the underlying mantle), and there is not heat Supply in mantle, and the asthenosphere under continent crust turn into the lithosphere mantle again, delamination will stop promptly. In the article we discussed the possibility of lower crust delamination in the eastern China during Mesozoic Era, and the thinning mechanism of the lithospliere. We think that the lower crust is not necessary, is not possible to delaminate together with the lithosphere mantle as well.
学科主题	Geology
类目[WOS]	Geology
收录类别	SCI
WOS记录号	WOS:000236152700001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/227287]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Zhang, Q,Jin, WJ,Wang, YL,et al. A model of delamination of continental lower crust.[J]. ACTA PETROLOGICA SINICA,2006,22(2):#REF!.
APA	Zhang, Q,Jin, WJ,Wang, YL,Li, CD,Wang, Y,&Jia, XQ.(2006).A model of delamination of continental lower crust..ACTA PETROLOGICA SINICA,22(2),#REF!.
MLA	Zhang, Q,et al."A model of delamination of continental lower crust.".ACTA PETROLOGICA SINICA 22.2(2006):#REF!.