Ar-Ar age, geochemistry and petrogenesis of Late Mesozoic volcanic rocks in the northern marginal region of Erlian basin, Inner-Mongolia

	Ar-Ar age, geochemistry and petrogenesis of Late Mesozoic volcanic rocks in the northern marginal region of Erlian basin, Inner-Mongolia
	Chen ZhiGuang 1,3; Zhang LianChang 1; Wu, HuaYing 1,3; Zhou XinHua 2; Liu Qing 3
刊名	ACTA PETROLOGICA SINICA
	2009-02-01
卷号	25 期号:2 页码:297-310
关键词	Early Cretaceous volcanic rocks Extensional tectonic setting Subducted ocean slab fluid metasomatism Enriched lithospheric mantle Northern margin region of Erlian basin
ISSN号	1000-0569
文献子类	Article
英文摘要	The studied area is located in the northern margin of Erlian basin, NE of China. The Late Mesozoic volcanic rocks in this area are mainly composed of rhyolite, basalt, trachy-basalt and basaltic andesite. (40)Ar-(39)Ar dating of Chagannuoer Formation rhyolite and Bulagenhada Formation basaltic andesite give a plateau age of 141.57 +/- 1.59Ma and 129.05 +/- 1.86Ma, respectively, indicating that these volcanic rocks were formed in Early Cretaceous. The geochemical characteristics of the volcanic rocks show that the earlier Chagannuoer Formation rhyolites origined from lower crustal magma, which experienced high degrees fractional crystallization or assimilation and fractional crystallization. The magma origination of Daotenuoer Formation rhyolites were middle-upper crust or lower crustal magma suffered strong asiimilation of upper crust. Bulagenhada Formation basic volcanics origined from the metasomatized lithospheric mantle modified by previous subducted ocean slabs, and Combining previous studies, we suggest that the tectonic environment of Early Cretaceous was intense lithopheric extension and thinning, related to Northern China lithopheric thinning geological event in Late Mesozoic.
WOS关键词	DA-HINGGAN MOUNTAINS ; NE CHINA ; NORTHEASTERN CHINA ; CRUSTAL GROWTH ; EASTERN CHINA ; PB ; GEOCHRONOLOGY ; GRANITES ; CRATON ; ORIGIN
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000265945400005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/71354]
专题	中国科学院地质与地球物理研究所
通讯作者	Chen ZhiGuang
作者单位	1.Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Chen ZhiGuang,Zhang LianChang,Wu, HuaYing,et al. Ar-Ar age, geochemistry and petrogenesis of Late Mesozoic volcanic rocks in the northern marginal region of Erlian basin, Inner-Mongolia[J]. ACTA PETROLOGICA SINICA,2009,25(2):297-310.
APA	Chen ZhiGuang,Zhang LianChang,Wu, HuaYing,Zhou XinHua,&Liu Qing.(2009).Ar-Ar age, geochemistry and petrogenesis of Late Mesozoic volcanic rocks in the northern marginal region of Erlian basin, Inner-Mongolia.ACTA PETROLOGICA SINICA,25(2),297-310.
MLA	Chen ZhiGuang,et al."Ar-Ar age, geochemistry and petrogenesis of Late Mesozoic volcanic rocks in the northern marginal region of Erlian basin, Inner-Mongolia".ACTA PETROLOGICA SINICA 25.2(2009):297-310.