Discovery of xenocrysts in basalts of Yixian Formation in west Liaoning Province and its significance.

	Discovery of xenocrysts in basalts of Yixian Formation in west Liaoning Province and its significance.
	Shao, JA ; Lu, FX ; Zhang, LQ ; Yang, JH
刊名	ACTA PETROLOGICA SINICA
	2005-11-01
卷号	21 期号:6 页码:1547-1558
关键词	West Liaoning Province Mesozoic Olivine Clinopyroxene Xenocryst Zoned Structure
ISSN号	1000-0569
文献子类	Article
英文摘要	The high-Mg basalts rich in magnesium (MgO = 8%-10%) existing in the bottom of Yixian formation of Early Cretaceous in the west Liaoning Province used to be called "High-Mg basalt". The authors of this paper recognize the olivine and clinopyroxene contained in those basalts as mantle xenocrysts according to studies on their morphological features, zoned structure, and opaque minerals borne in them. Reaction of the xenocrysts with the melt mass not only resulted in the zoned structure, but also increased the content of magnesium in the melt because contents of Mg, Ni, and Cr are higher and contents of Fe, Mn, and Ca are lower in the xenocrysts than in the basaltic melt. Besides, the anti-zoned and complex-zoned structure of the clinopyroxenes reflect intermingling of two kinds of melts. Discovery of those olivine and clinoaugit xenocrysts, therefore, helps to reveal : 1) interaction of the lithospheric mantle with the melt mass, which resulted in the high-magnesium rocks, and 2) intermingling of the two kinds of melts. The discovery is of significance for further researching transformation and disruption of the Mesozoic lithosphere in North China and for understanding the Mesozoic geodynamic background and tectonic settings of the eastern North China Craton.
WOS关键词	NORTH CHINA CRATON ; LITHOSPHERIC MANTLE ; MESOZOIC BASALTS ; VOLCANIC-ROCKS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000234692900004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65618]
专题	中国科学院地质与地球物理研究所
通讯作者	Shao, JA
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.China Univ Geosci, Wuhan 430074, Peoples R China 3.Geol Bur Inner Mongolia, Hohhot 010020, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Shao, JA,Lu, FX,Zhang, LQ,et al. Discovery of xenocrysts in basalts of Yixian Formation in west Liaoning Province and its significance.[J]. ACTA PETROLOGICA SINICA,2005,21(6):1547-1558.
APA	Shao, JA,Lu, FX,Zhang, LQ,&Yang, JH.(2005).Discovery of xenocrysts in basalts of Yixian Formation in west Liaoning Province and its significance..ACTA PETROLOGICA SINICA,21(6),1547-1558.
MLA	Shao, JA,et al."Discovery of xenocrysts in basalts of Yixian Formation in west Liaoning Province and its significance.".ACTA PETROLOGICA SINICA 21.6(2005):1547-1558.