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Pyroxenite-derived Cenozoic basaltic magmatism in central Inner Mongolia, eastern China: Potential contributions from the subduction of the Paleo-Pacific and Paleo-Asian oceanic slabs in the Mantle Transition Zone
Pang, Chong-Jin1; Wang, Xuan-Ce2,3,4; Li, Chao-Feng5; Wilde, Simon A.6; Tian, Liyan7,8
2019-05-01
Source PublicationLITHOS
ISSN0024-4937
Volume332Issue:1Pages:39-54
Abstract

Widespread Cenozoic basalts, erupted at ca. 24-0.16 Ma in central Inner Mongolia, eastern China, are significant for understanding the potential links between deep subduction of oceanic slabs and the genesis of continental intra-plate magmatism. Here we examine the whole-rock geochemical and isotopic data, as well as olivine compositions, for Cenozoic alkali and tholeiitic basalts from the Abaga, Huitengliang, and Chifeng areas in central Inner Mongolia. The results suggest that fractional crystallization of olivine + clinopyroxene (in the alkali basalts) and olivine (in the tholeiites), played a key role in their magmatic evolution, without significant crustal contamination or post-magmatic alteration. Geochemical and petrogenetic analyses show that pyroxene and garnet were dominant phases in the residual mineral assemblage for both alkali basalts and tholeiites, implying a pyroxenite source for these basalts. We propose that a pyroxenite-dominated source may be the product of reaction between recycled oceanic slab-derived melts and surrounding mantle peridotites. The spatial and geochemical variations of the Cenozoic basalts in central Inner Mongolia, together with recent geophysical and geological observations in eastern China, imply that the origin and evolution of large-scale Cenozoic continental intra-plate magmatism can be related to subduction of the Paleo-Pacific and Paleo-Asian oceanic slabs. Incorporation of recycled oceanic materials from these two subducted slabs thus influenced the mantle source lithologies and deep-Earth geodynamic processes beneath eastern China. (C) 2019 Published by Elsevier B.V.

KeywordCentral Inner Mongolia Cenozoic Intra-plate Basalts Pyroxenite Source Recycled Oceanic Crust Paleo-pacific And Paleo-asian Oceanic Subduction Eastern China
DOI10.1016/j.lithos.2019.02.012
Indexed BySCI
Funding OrganizationAustralian Research Council (ARC) Future Fellowship ; Hundred Talents Program of Shanxi Province, China ; Science Foundation of Chang'a University ; National Natural Science Foundation of China ; Knowledge Innovation Program of the Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences
Language英语
Funding ProjectAustralian Research Council (ARC) Future Fellowship[FT140100826] ; Hundred Talents Program of Shanxi Province, China ; Science Foundation of Chang'a University[310827163412] ; National Natural Science Foundation of China[41506047] ; National Natural Science Foundation of China[41703039] ; Knowledge Innovation Program of the Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences[Y570031QY1]
WOS KeywordLithospheric Mantle ; Trace-elements ; Geochemical Evidence ; Continental Basalts ; Igneous Province ; Alkaline Basalts ; Source Lithology ; Recycled Crust ; Flood Basalts ; Source Region
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000464891900003
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6747
Collection深海科学研究部_深海地质与地球化学研究室
Corresponding AuthorWang, Xuan-Ce
Affiliation1.Guilin Univ Technol, Collaborat Innovat Ctr Explorat Hidden Nonferrous, Dev New Mat Guangxi, Guangxi Key Lab Hidden Met Ore Deposits Explorat, Guilin 541004, Guangxi, Peoples R China
2.Yunnan Univ, Yunnan Key Lab Earth Syst Sci, Res Ctr Earth Syst Sci, Kunming 650500, Yunnan, Peoples R China
3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
4.Univ Queensland, Sch Earth & Environm Sci, Brisbane, Qld 4072, Australia
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
6.Curtin Univ, Sch Earth & Planetary Sci, Inst Geosci Res TIGeR, GPO Box U1987, Perth, WA 6845, Australia
7.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
8.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China
Recommended Citation
GB/T 7714
Pang, Chong-Jin,Wang, Xuan-Ce,Li, Chao-Feng,et al. Pyroxenite-derived Cenozoic basaltic magmatism in central Inner Mongolia, eastern China: Potential contributions from the subduction of the Paleo-Pacific and Paleo-Asian oceanic slabs in the Mantle Transition Zone[J]. LITHOS,2019,332(1):39-54.
APA Pang, Chong-Jin,Wang, Xuan-Ce,Li, Chao-Feng,Wilde, Simon A.,&Tian, Liyan.(2019).Pyroxenite-derived Cenozoic basaltic magmatism in central Inner Mongolia, eastern China: Potential contributions from the subduction of the Paleo-Pacific and Paleo-Asian oceanic slabs in the Mantle Transition Zone.LITHOS,332(1),39-54.
MLA Pang, Chong-Jin,et al."Pyroxenite-derived Cenozoic basaltic magmatism in central Inner Mongolia, eastern China: Potential contributions from the subduction of the Paleo-Pacific and Paleo-Asian oceanic slabs in the Mantle Transition Zone".LITHOS 332.1(2019):39-54.
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