Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area, Beishan Moutains, NW China.

	Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area, Beishan Moutains, NW China.
	Mao QiGui 1,2,3; Xiao WenJiao 1; Han ChunMing 1; Sum Min 4; Yuan Chao 5; Zhang JiEn 1; Ao SongJian 1; Li JiLiang 1
刊名	ACTA PETROLOGICA SINICA
	2010-02-01
卷号	26 期号:2 页码:584-596
关键词	Adakite Slab Melting La-icpms Dating Zircon Hf Isotopic Crustal Growth Beishan Mountains
ISSN号	1000-0569
文献子类	Article
英文摘要	The gneiss gran nod in Liuyuan area of the Beishan Mountains belongs to the calc-alkaline serious, characterized by having relative high SiO(2) (>56%) Al(2)O(3) (>15%) and relative low MgO (<3%) contents, Na(2)O > K(2)O; enriched in Sr (>400 x 10(-6)) and high Sr/Y ratios; relatively strong REE segregation ((La/Yb)(N) = 18 similar to 86) and depleted HREE (Yb and Y), only weak negative Eu negative (delta Eu = 0 90 similar to 0 95); enriched in LREE and LILE, depleted in HREE and HFSE. (Nb, Ta), is similar to the typical adakites formed by melting of the oceanic slab subduction However, the isotopic compositions of the adakite rocks are more radiogenic than most typical depleted adakites, with relatively high (87)Sr/(86)Sr(1) (0. 70635 similar to 0 70636), low epsilon(Nd) (t) (-0 8 similar to -0 9) and the low epsilon(Nd)(t) (-0. 8 similar to +2 7) These isotopic differences front typical adakites are attribute to participation of the crustal and/or sedimentary components in the magma source and/or the inheritance of a more radiogenic oceanic slab (OIB/E-MORB) of the source, and contaminated by crustal component in the intruded process This adakite have the crystallization age 424 +/- 4Ma by zircon LA-ICPMS U-Pb dating During the Middle Silurian, the geothermic grade was high in the Huaniushan arc, huge area high epsilon(Nd)(t) calcalkaline gramtiods intruded and extensive high-T metamorphism happened. Therefore, the favorable interpretation is that the Luyuan adakites was formed by melting of a hot subductmg oceanic slab, which could be one of most important crustal growth ways in the Early Paleozoic in the Beishan Mountains
WOS关键词	PHANEROZOIC CRUSTAL GROWTH ; A-TYPE GRANITES ; SUBDUCTING OCEANIC-CRUST ; ASIAN OROGENIC BELT ; ZIRCON U-PB ; CONTINENTAL GROWTH ; EASTERN TIANSHAN ; ACCRETIONARY OROGENESIS ; PALEOZOIC ACCRETIONARY ; NORTHEASTERN CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000275734400019
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73456]
专题	中国科学院地质与地球物理研究所
通讯作者	Mao QiGui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.China Nonferrous Met Resource Geol Survey, Beijing 100012, Peoples R China 3.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China 4.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Mao QiGui,Xiao WenJiao,Han ChunMing,et al. Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area, Beishan Moutains, NW China.[J]. ACTA PETROLOGICA SINICA,2010,26(2):584-596.
APA	Mao QiGui.,Xiao WenJiao.,Han ChunMing.,Sum Min.,Yuan Chao.,...&Li JiLiang.(2010).Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area, Beishan Moutains, NW China..ACTA PETROLOGICA SINICA,26(2),584-596.
MLA	Mao QiGui,et al."Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area, Beishan Moutains, NW China.".ACTA PETROLOGICA SINICA 26.2(2010):584-596.