Geochemistry and Mineralogy of Two Contrasting Cretaceous Lavas: Implications for Lithospheric Mantle Evolution beneath the Northeastern North China Craton

doi:10.2747/0020-6814.50.11.1040

	Geochemistry and Mineralogy of Two Contrasting Cretaceous Lavas: Implications for Lithospheric Mantle Evolution beneath the Northeastern North China Craton
	Shi, Guanghai 1; Zhu, Rixiang 2; Jiang, Neng 2; Jia, Xiuming 3
刊名	INTERNATIONAL GEOLOGY REVIEW
	2008-11-01
卷号	50 期号:11 页码:1040-1053
ISSN号	0020-6814
DOI	10.2747/0020-6814.50.11.1040
文献子类	Article
英文摘要	A combined geochemical and mineralogical study has been conducted on a volcanic sequence at Jianguo, northeastern North China craton (NCC). This sequence contains two contrasting rock types, the lower andesitic lava and the upper basaltic lava. The lower lava is comprised of Cr-spinel (chromite mostly)-bearing andesites, whereas the upper lava consists of titanomagnetite (up to 5965 mol% Usp)-bearing basalts. Ar-40/Ar-39 dating shows that the Jianguo andesites and basalts are 116.8 +/- 3.0 Ma and 105.5 +/- 0.5 Ma, respectively. The basalts have initial Sr-Nd isotopic ratios characteristic of mid-ocean ridge basalt (MORB) and have been interpreted as derived from MORB-type asthenosphere. The andesites, with evolved Sr-Nd isotope features and negative Ta and Nb anomalies, are interpreted to have been ultimately derived from MORB-type asthenosphere accompanied by combined assimilation and fractional crystallization. This suggestion is applicable to the genesis of two other coeval andesites nearby. These geochemical contrasts imply that the lithospheric mantle beneath the eastern part of NCC was considerably thinned by ca. 117 Ma.
WOS关键词	CENOZOIC VOLCANIC-ROCKS ; HIGH-MG ANDESITES ; EASTERN CHINA ; LIAONING PROVINCE ; INNER-MONGOLIA ; BASALTS ; PB ; PALEOINTENSITY ; CONSTRAINTS ; TITANOMAGNETITE
WOS研究方向	Geology
语种	英语
出版者	BELLWETHER PUBL LTD
WOS记录号	WOS:000260053500006
资助机构	Program for the New Century Excellent Talents in China(NCET-07-0771) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; National Science Foundation of China(40672046 ; National Science Foundation of China(40672046 ; 40572049) ; 40572049) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; National Science Foundation of China(40672046 ; National Science Foundation of China(40672046 ; 40572049) ; 40572049) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; National Science Foundation of China(40672046 ; National Science Foundation of China(40672046 ; 40572049) ; 40572049) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; Program for the New Century Excellent Talents in China(NCET-07-0771) ; National Science Foundation of China(40672046 ; National Science Foundation of China(40672046 ; 40572049) ; 40572049)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70256]
专题	中国科学院地质与地球物理研究所
通讯作者	Shi, Guanghai
作者单位	1.China Univ Geosci, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Taiyuan Univ Technol, Taiyuan 030024, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Shi, Guanghai,Zhu, Rixiang,Jiang, Neng,et al. Geochemistry and Mineralogy of Two Contrasting Cretaceous Lavas: Implications for Lithospheric Mantle Evolution beneath the Northeastern North China Craton[J]. INTERNATIONAL GEOLOGY REVIEW,2008,50(11):1040-1053.
APA	Shi, Guanghai,Zhu, Rixiang,Jiang, Neng,&Jia, Xiuming.(2008).Geochemistry and Mineralogy of Two Contrasting Cretaceous Lavas: Implications for Lithospheric Mantle Evolution beneath the Northeastern North China Craton.INTERNATIONAL GEOLOGY REVIEW,50(11),1040-1053.
MLA	Shi, Guanghai,et al."Geochemistry and Mineralogy of Two Contrasting Cretaceous Lavas: Implications for Lithospheric Mantle Evolution beneath the Northeastern North China Craton".INTERNATIONAL GEOLOGY REVIEW 50.11(2008):1040-1053.