Geochemistry and tectonic implications of rhyolites from Yingcheng Formation in Xujiaweizi, Songliao Basin.

	Geochemistry and tectonic implications of rhyolites from Yingcheng Formation in Xujiaweizi, Songliao Basin.
	Meng FanChao 1; Liu JiaQi 1; Li Ming 2; Liu Xiao 2; Yin ChangHai 3; Lu JiaMin 3; Cui Yan 4
刊名	ACTA PETROLOGICA SINICA
	2010
卷号	26 期号:1 页码:227-241
关键词	Songliao Basin Yingcheng Formation Rhyolite Geochemistry Tectonic significance
ISSN号	1000-0569
文献子类	Article
英文摘要	The intermediate-felsic rocks, mainly rhyolites, are widely distributed in Yingcheng Formation in Xujiaweizi, Songliao Basin. Petrological, major and trace elements geochemistry Studies exhibit that the content of many elements (e.g. Si, K, Rb) of the rhyolites is a little influenced by burial and regional metamorphism, low-temperature hydration and hydrothermal alteration. The rhyolites are prominently enriched strongly incompatible elements Such as Rb, Th, U, Pb, and have apparently negative Ba, Sr, Ti, Eu, P anomalies, which indicate the rocks were produced by fractional crystallization of plagioclase, apatite and ilmenite. The rhyolites have high and wide initial (87)Sr/(86)Sr (0.705265 similar to 711895) ratios. Most epsilon(ND) (t) values of the rhyolites are all positive and have a narrow range (1.83 similar to 3.38), but they have an analogical radiogenic Pb (((206)Pb/(204)Pb)(i) = 18.09 similar to 18.32, ((207)pb/(204)Pb)(i) = 15.50 similar to 15.54, ((208)Pb/(204)Pb)(i) = 37.80 similar to 38.10). The features of isotopic data indicate that the primary, magmas were derived originated from a mixed source by juvenile component and ancient crust, but contaminated by the crust in different level during evolution. The rhyolites may erupt in extensional setting within plate in the Early Cretaceous, and were probably associated with the lithospheric thinning and asthenospheric mantle upwelling by subduction of the Pacific plate beneath eastern China.
WOS关键词	A-TYPE GRANITES ; DA-HINGGAN MOUNTAINS ; PHANEROZOIC CRUSTAL GROWTH ; FELSIC VOLCANIC-ROCKS ; GREAT XINGAN RANGE ; NE CHINA ; NORTHEASTERN CHINA ; CHEMICAL CLASSIFICATION ; ISOTOPIC CONSTRAINTS ; MAGMATIC EVOLUTION
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000274509500025
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72214]
专题	中国科学院地质与地球物理研究所
通讯作者	Meng FanChao
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.Daqing Oil Field, Res Inst Petr Explorat & Dev, Daqing 163712, Peoples R China 4.Shengli Oil Field, Res Inst Geol Sci, Dongying 257015, Peoples R China
推荐引用方式 GB/T 7714	Meng FanChao,Liu JiaQi,Li Ming,et al. Geochemistry and tectonic implications of rhyolites from Yingcheng Formation in Xujiaweizi, Songliao Basin.[J]. ACTA PETROLOGICA SINICA,2010,26(1):227-241.
APA	Meng FanChao.,Liu JiaQi.,Li Ming.,Liu Xiao.,Yin ChangHai.,...&Cui Yan.(2010).Geochemistry and tectonic implications of rhyolites from Yingcheng Formation in Xujiaweizi, Songliao Basin..ACTA PETROLOGICA SINICA,26(1),227-241.
MLA	Meng FanChao,et al."Geochemistry and tectonic implications of rhyolites from Yingcheng Formation in Xujiaweizi, Songliao Basin.".ACTA PETROLOGICA SINICA 26.1(2010):227-241.