Intra-continental basalt data mining: The diversity of their constituents and the performance in basalt discrimination diagrams

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	Intra-continental basalt data mining: The diversity of their constituents and the performance in basalt discrimination diagrams
	Wang JinRong 1; Pan Zhenjie 1; Zhang Qi 2; Chen WanFeng 1; Yang Jing 1; Jiao ShouTao 2; Wang ShuHua 1
刊名	ACTA PETROLOGICA SINICA
	2016-07-01
卷号	32 期号:7 页码:1919-1933
关键词	Continental flood basalt Rift basalt Within-plate basalt Data mining Depleted mantle Enriched mantle Island arc
文献子类	Article
英文摘要	It is generally considered that continental flood basalts (CFB), rift basalts (CRB), within-plate basalt (WPB) are produced in the plate tectonic setting which is related to the mantle plume activities from the enriched lower mantle, similar to OIB in terms of geochemistry characteristics. In this paper, a GEOROC database of the global CFB, CRB and WPB is used to find that these three categories almost fall in all various basalt tectonic environment areas, some even primarily falls in MORB or IAB, but not in WPB area. This result suggests that the original discriminant function of the basalt discrimination diagrams is still questionable, especially, there exist some problems in most of the discrimination diagrams of continental basalt. All these tremendous changes of CFB, CRB and WPB geochemistry compositions suggest that the source may be strongly heterogeneous: some of CFB, CRB and WPB come from enriched mantle plume with classic characteristics of OIB, some of them derive from MORB source related with the slab-recycled effect, and others from depleted mantle source beneath the island arc lithosphere, characterized by obvious Nb-Ta depletion, similar to island arc basalts. In many places, continental basalts can be divided into two types: low titanium and high titanium. Low-Ti basalts are depleted or strongly depleted, and high-Ti basalts are usually enriched. The study of this paper shows that enriched-type basalts may come from enriched lower mantle, but strongly-depleted-type or depleted-type basalts may derive from the astheospheric mantle characterized by MORB or TAB. The study further points out that the nature of the source may be the main controlling factor of the qualities of continental basalts. Meanwhile, there are many other important factors leading to the diversity of continental basalts, such as the degree of partial melting, melting depth, fractional crystallization, crustal contamination and AFC process.
WOS关键词	CONTINENTAL FLOOD BASALTS ; MEXICAN VOLCANIC BELT ; SR-ND ISOTOPE ; TRACE-ELEMENT ; CRUSTAL CONTAMINATION ; SOUTH-AFRICA ; TECTONIC DISCRIMINATION ; IGNEOUS PROVINCE ; GEOCHEMICAL CONSTRAINTS ; MANTLE HETEROGENEITY
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000381327100001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53326]
专题	地质与地球物理研究所_离退休科研人员
作者单位	1.Lanzhou Univ, Sch Earth Sci, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang JinRong,Pan Zhenjie,Zhang Qi,et al. Intra-continental basalt data mining: The diversity of their constituents and the performance in basalt discrimination diagrams[J]. ACTA PETROLOGICA SINICA,2016,32(7):1919-1933.
APA	Wang JinRong.,Pan Zhenjie.,Zhang Qi.,Chen WanFeng.,Yang Jing.,...&Wang ShuHua.(2016).Intra-continental basalt data mining: The diversity of their constituents and the performance in basalt discrimination diagrams.ACTA PETROLOGICA SINICA,32(7),1919-1933.
MLA	Wang JinRong,et al."Intra-continental basalt data mining: The diversity of their constituents and the performance in basalt discrimination diagrams".ACTA PETROLOGICA SINICA 32.7(2016):1919-1933.