Quzhen peraluminous granite, Tibet: Geochemical characteristics and;geodynamic significance.

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	Quzhen peraluminous granite, Tibet: Geochemical characteristics and;geodynamic significance.
	Liao, ZL 3; Mo, XX ; Pan, GT ; Zhu, DC ; Wang, LQ ; Zhao, ZD ; Geng, QR ; Dong, GC
刊名	ACTA PETROLOGICA SINICA
	2006
卷号	22 期号:4 页码:845-854
关键词	peraluminous granite geochemistry tectonic setting petrogenis Quzhen Tibet
ISSN号	1000-0569
英文摘要	Geochemical characteristics of the peraluminous granite in Quzhen (QPG), Tibet, are presented in this paper. The QPG develop in the Indo-Asian collision zone. The results show that the QPG have high SiO2 (72.72% similar to 73.34%) Al2O3 and K2O composition and low TiO2, Fe2O3 Composition. It is a type with supersaturation of Al and Si, a typical muscovite-type of strongly peraluminous granites (MPG-type). The Sigma REE has the range of 99.71 x 10(-6) to 132.85 X 10(-6), REE spider diagram shows obvious Eu negative alnormity and Cc negative abnormity. Peraluminous index diagram, preliminary mantle-normalized trace element patterns spider diagram, R-1-R-2 diagram, Rb-(Y + Nb) and Nb-Y diagrams indicate the QPG is formed in sys-collision setting. Its orientational mechanism relates in slab subduction and introcontinental adjust of post-collision. The QPG have extremely low epsilon(Nd) (t) of -14.8 similar to -15.4 and extremely old Nd model age, these and epsilon(Sr)(t)-epsilon(Nd)(t) diagram indicate it has old upper crust material source. The QPG has relative high (Sr-87/Sr-86)(i) of 0.72699 similar to 0.73884, it can draw a conclusion that the QPG's petrogeis is the result by partial melt of continental crust. The QPG's magma is mainly originated from argillyte and slight amount arenaceous rock, is the result for partial melt of mature continental continental segment.
学科主题	火成岩岩石学
WOS关键词	PETROGENESIS ; ORIGIN
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000238367700008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38134]
专题	中国地质调查局成都地质调查中心
作者单位	1.Chengdu Inst Geol & Mineral Resources, Chengdu 610082, Peoples R China. 2.China Univ Geosci, Minist Educ, Key Lab Lithospher Tecton & Explorat, Beijing 100083, Peoples R China. 3.中国地质调查局成都地质调查中心
推荐引用方式 GB/T 7714	Liao, ZL,Mo, XX,Pan, GT,et al. Quzhen peraluminous granite, Tibet: Geochemical characteristics and;geodynamic significance.[J]. ACTA PETROLOGICA SINICA,2006,22(4):845-854.
APA	Liao, ZL.,Mo, XX.,Pan, GT.,Zhu, DC.,Wang, LQ.,...&Dong, GC.(2006).Quzhen peraluminous granite, Tibet: Geochemical characteristics and;geodynamic significance..ACTA PETROLOGICA SINICA,22(4),845-854.
MLA	Liao, ZL,et al."Quzhen peraluminous granite, Tibet: Geochemical characteristics and;geodynamic significance.".ACTA PETROLOGICA SINICA 22.4(2006):845-854.