Si- and alkali-rich melt inclusions in minerals of mantle peridotites from eastern China: Implication for lithospheric evolution

doi:10.1007/s11430-005-0117-3

	Si- and alkali-rich melt inclusions in minerals of mantle peridotites from eastern China: Implication for lithospheric evolution
	Fan, QC ; Sui, JL ; Xu, P ; Li, N ; Sun, Q ; Wang, TH
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2006
卷号	49 期号:1 页码:43-49
关键词	Si- and alkali-rich melt inclusion mantle peridotite lithospheric evolution eastern China
ISSN号	1006-9313
DOI	10.1007/s11430-005-0117-3
文献子类	Article
英文摘要	Minerals of spinel- and garnet-facies mantle xenoliths entrained in Cenozoic basalts from eastern China (North China, Northeastern China and Southeastern China coastal area) contains lots of melt inclusions. Studies on these melt inclusions show that the glass inclusions are rich in SiO2 (60% - 68%) and alkalis (K2O+Na2O = 5% - 11 %, especially for K2O) as well as volatiles such as H2O and CO2 (2% - 7%), which belong to dacites and andesites of the high-K calcic alkali series rocks with few shoshonites. High Al and Ca diopside in melt inclusion is the product of melt crystallization at high temperature and pressure, rather than the product of devitrification. Results show that these K-rich (in general K2O > 3%) intermediate-acidic silicate melt inclusions have characteristics of continent without a genetical link to host basalts and their phenocrystic minerals. Thus, these trapped melt inclusions represent melts of Mesozoic lithospheric mantle-crust interaction and imply that the continental lithospheric mantle beneath eastern China had undergone fragmentation and recreation processes during the Mesozoic and Cenozoic periods. This result undoubtly provides important implication for the evolution of sub-continental lithosphere beneath eastern China. We propose that these Si- and alkalis-rich melts should be responsible for the mantle chemical heterogeneity underneath eastern China.
WOS关键词	ULTRAMAFIC XENOLITHS ; SILICA-RICH ; WEST-EIFEL ; METASOMATISM ; REPLACEMENT ; GERMANY ; BASALTS ; BENEATH ; CRATON ; GEES
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000235671100006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/66528]
专题	中国科学院地质与地球物理研究所
通讯作者	Fan, QC
作者单位	1.China Seismol Bur, Inst Geol, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Fan, QC,Sui, JL,Xu, P,et al. Si- and alkali-rich melt inclusions in minerals of mantle peridotites from eastern China: Implication for lithospheric evolution[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49(1):43-49.
APA	Fan, QC,Sui, JL,Xu, P,Li, N,Sun, Q,&Wang, TH.(2006).Si- and alkali-rich melt inclusions in minerals of mantle peridotites from eastern China: Implication for lithospheric evolution.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49(1),43-49.
MLA	Fan, QC,et al."Si- and alkali-rich melt inclusions in minerals of mantle peridotites from eastern China: Implication for lithospheric evolution".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49.1(2006):43-49.