Petrogenesis of high-Ti and low-Ti basalts in Emeishan, Yunnan, China.

	Petrogenesis of high-Ti and low-Ti basalts in Emeishan, Yunnan, China.
	Jiang HanBing 1,2; Jiang ChangYi 2; Qian ZhuangZhi 2; Zhu Shifei 3; Zhang PengBo 4; Tang DongMei 5
刊名	ACTA PETROLOGICA SINICA
	2009-05-01
卷号	25 期号:5 页码:1117-1134
关键词	Emeishan basalt Petrology Petrogeochemistry Magma process Petrogenesis
ISSN号	1000-0569
文献子类	Article
英文摘要	The most main rock type of the Emeishan basalts are low-Ti basalts and high-Ti basalts, and has the few picrites. They enrich in LILE and LREE at different degrees, and deplete relatively to HREE, REE fractionate evidently, compatible elements (Co, V, Cr, Ni) deplete significantly. Low-Ti basalt magma was obviously contaminated by continent crust, in a larger extent than high-Ti basalt magma. And influences of contamination on Sr isotope and LILE are more evident than those on Nd isotope and REE. Nd and Sr isotope prove that contamination materials are mainly metamorphic rocks of lower continent crust, but also have minor rocks of upper continent crust. That the samples were not contaminated shows Nd and Sr isotopic compositions of moderately depleted mantle. Clinopyroxenes are main fractional crystallization phases/accumulation phases, plagioclases are minor in differentiation processes of high-Mg tholeiitic magma. However, clinopyroxenes and plagioclases are main fractional crystallization phases/accumulation phases of high-Mg transitional magma. Main body part of low-Ti basalts melted around the spinel-garnet transition zone;but main body part of high-Ti basalts melted within the garnet stability field,extremely few are partial melting within the spinel stability field.
WOS关键词	PLUME-LITHOSPHERE INTERACTION ; SOUTHWESTERN CHINA ; OCEANIC-CRUST ; FLOOD BASALTS ; PROVINCE ; MANTLE ; VOLCANISM ; EARTH
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000266684900007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71614]
专题	中国科学院地质与地球物理研究所
通讯作者	Jiang HanBing
作者单位	1.Xian Inst Geol & Mineral Resources, Xian 710054, Peoples R China 2.Changan Univ, Coll Earth Sci & Land Resourses, Xian 710054, Peoples R China 3.Xian Shiyou Univ, Xian 710065, Peoples R China 4.China Univ Min & Technol, Xuzhou 221008, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Jiang HanBing,Jiang ChangYi,Qian ZhuangZhi,et al. Petrogenesis of high-Ti and low-Ti basalts in Emeishan, Yunnan, China.[J]. ACTA PETROLOGICA SINICA,2009,25(5):1117-1134.
APA	Jiang HanBing,Jiang ChangYi,Qian ZhuangZhi,Zhu Shifei,Zhang PengBo,&Tang DongMei.(2009).Petrogenesis of high-Ti and low-Ti basalts in Emeishan, Yunnan, China..ACTA PETROLOGICA SINICA,25(5),1117-1134.
MLA	Jiang HanBing,et al."Petrogenesis of high-Ti and low-Ti basalts in Emeishan, Yunnan, China.".ACTA PETROLOGICA SINICA 25.5(2009):1117-1134.