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	Geochemical characteristics and petrogenesis of the aikendaban permian shoshonite in the western tianshan
	Luo Yong1,2; Niu HeCai1; Shan Qiang1; Yang WuBin1,2; Zhang Bing3; Zhou ChangPing3; Liao SiPing4; Yu XueYuan1
刊名	Acta petrologica sinica
	2010-10-01
卷号	26期号:10页码:2925-2934
关键词	Western tianshan Aikendaban Trachyandesite Trachyte Post-subduction magmatism
ISSN号	1000-0569
通讯作者	Luo yong(luoyong@gig.ac.cn)
英文摘要	Trachyandesite and trachyte from the aikendaban formation in the western tianshan, are alkali-rich (na(2)o + k(2)o > 8%) of high-aluminium (al(2)o(3) > 13.5%) and low-titanium (tio(2) < 1. 31%), and have typical petro-geochemical characteristics of shoshonitic volcanics. compared with classic shoshonite association, the trachyandesite is obviously high in tio(2), al(2)o(3) and na(2)o, and relatively low in fe(2)o(3), cao and mgo, and the trachyte is obviously high in tio(2), fe(2)o(3) and na(2)o, comparatively low in al(2)o(3) and extremely low in cao. the bee geochemical characteristics of trachyandesite, show obvious enrichment of lree, obvious depletion of hree and negative en anomalies, high sr/y (29 similar to 49) ratio and low ((87)sr/(86)sr), (0. 7044 similar to 0.7045). trachyte show less enrichment of lree and depletion of hree, stronger negative en anomalies, even appears strong depletion phenomenon of sr, low sr/y(1. 74 similar to 2. 50) ratio and high ((87)sr/(86)sr)(i) (0. 7060 similar to 0. 7080). the results showed that both trachyandesite and trachyte from aikendaban formation as a product of post-subduction magmatism, but they were formed in different stages of subduction; the trachyandesite is a typical shoshonitic alkaline volcanics which originated by low-degree (less than 5%) partial melting of the em in the post-subduction extension stage, with melting phase of amphibole and residual phase of abundance garnet for their high sr/y ratio; and the trachyte is felsic-alkaline volcanics originated by partial melting of the juvenile lower crust in the post-subduction compression stage, which formed earlier than the trachyandesite.
WOS关键词	PORPHYRY CU-AU ; NEW-SOUTH-WALES ; GOLD-COPPER MINERALIZATION ; IGNEOUS ROCKS ; GEODYNAMIC EVOLUTION ; TECTONIC EVOLUTION ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; CALC-ALKALINE ; SR-ND
WOS研究方向	Geology
WOS类目	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000284450800005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2412770
专题	中国科学院大学
通讯作者	Luo Yong
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Coll Earth Sci, Beijing 100049, Peoples R China 3.Xinjiang Bur Geol & Mineral Resource Explorat, Geol Survey Team 7, Wusu 833000, Peoples R China 4.Jiangxi Inst Geol Survey, Nanchang 330030, Peoples R China
推荐引用方式 GB/T 7714	Luo Yong,Niu HeCai,Shan Qiang,et al. Geochemical characteristics and petrogenesis of the aikendaban permian shoshonite in the western tianshan[J]. Acta petrologica sinica,2010,26(10):2925-2934.
APA	Luo Yong.,Niu HeCai.,Shan Qiang.,Yang WuBin.,Zhang Bing.,...&Yu XueYuan.(2010).Geochemical characteristics and petrogenesis of the aikendaban permian shoshonite in the western tianshan.Acta petrologica sinica,26(10),2925-2934.
MLA	Luo Yong,et al."Geochemical characteristics and petrogenesis of the aikendaban permian shoshonite in the western tianshan".Acta petrologica sinica 26.10(2010):2925-2934.

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