Nd, Sr and Pb isotopic geochemistry of late-Mesozoic alkaline-rich intrusions from the Tanlu Fault zone: evidence of the magma source

	Nd, Sr and Pb isotopic geochemistry of late-Mesozoic alkaline-rich intrusions from the Tanlu Fault zone: evidence of the magma source
	Yan GuoHan 1; Cai JianHui 1,2; Ren KangXu 1,3; Mu BaoLei 1; Li FengTang 1; Chu ZhuYin 4
刊名	ACTA PETROLOGICA SINICA
	2008-06-01
卷号	24 期号:6 页码:1223-1236
关键词	Nd, Sr and Pb isotopic characteristics nature of the magma source late Mesozoic alkaline-rich intrusive rocks Tan-Lu Fault zone
ISSN号	1000-0569
文献子类	Article
英文摘要	Tanlu Fault Zone, a large deep fault zone in eastern China, cuts four tectonic units (the North China Craton, the Yangtz Craton, the Hinggan-Inner Mongolia-Jilin-Heilongjiang orogenic belt and the Sulu-Dabie orogenic belt) straight. It is well known that there is a nearly 2000 kilometer-long alkali-rich intrusive rock belt composed of many late-Mesozoic alkaline-rich intrusions in this zone. Based on the pioneers' research, a systematic and thorough geochemical study on their Nd, Sr and Pb isotope is presented in this paper for the first time. The distinct different Nd, Sr and Pb isotopic characteristics of the alkali-rich intrusive rocks ill the four tectonic units indicates their different source regions: the late-Mesozoic alkaline intrusions from the Hinggan-Inner Mongolia-Jilin-Heilongjiang orogenic belt are derived from the young crust related to depleted mantle, but the others from the North China Craton, the Yangtz Craton and the Sulu-Dabie orogenic belt are mainly originated from the EMI-type enriched mantle. Farther more, the enrichment degree of the lithospheric mantle from the latter three units is obviously different from each other: the lithospheric mantle from the Sulu-Dabie orogenic belt has the highest enrichment (average epsilon(Nd) (t) value is -17.06), that from the North China Craton (average epsilon(Nd) (t) value is -10.03) takes second place, and the enrichment of the mantle in the Yangtz Craton (average epsilon(Nd) (t) value is -6.41) is the lowest. It is suggested in this paper that the most enriched lithospheric mantle from the Sulu-Dabie orogenic belt results from the releasing of pressure in the subduction-exhumation in early Mesozoic era in the Sulu-Dabie orogenic, which conduces to the formation, precipitation and metasomatism of melt/fluids, and then reconstructs the lithospheric mantle from the North China Craton.
WOS关键词	NORTH CHINA CRATON ; LITHOSPHERIC MANTLE BENEATH ; IGNEOUS ROCKS ; DEEP SUBDUCTION ; EASTERN CHINA ; CONSTRAINTS ; REGION ; OROGEN ; GEODYNAMICS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000259628800006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69840]
专题	中国科学院地质与地球物理研究所
通讯作者	Yan GuoHan
作者单位	1.Peking Univ, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 3.PetroChina, Tarim Oilfield Co, Res Inst Explorat & Dev, Korla 841000, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Yan GuoHan,Cai JianHui,Ren KangXu,et al. Nd, Sr and Pb isotopic geochemistry of late-Mesozoic alkaline-rich intrusions from the Tanlu Fault zone: evidence of the magma source[J]. ACTA PETROLOGICA SINICA,2008,24(6):1223-1236.
APA	Yan GuoHan,Cai JianHui,Ren KangXu,Mu BaoLei,Li FengTang,&Chu ZhuYin.(2008).Nd, Sr and Pb isotopic geochemistry of late-Mesozoic alkaline-rich intrusions from the Tanlu Fault zone: evidence of the magma source.ACTA PETROLOGICA SINICA,24(6),1223-1236.
MLA	Yan GuoHan,et al."Nd, Sr and Pb isotopic geochemistry of late-Mesozoic alkaline-rich intrusions from the Tanlu Fault zone: evidence of the magma source".ACTA PETROLOGICA SINICA 24.6(2008):1223-1236.