IOCAS-IR  > 海洋地质与环境重点实验室
Origin of the Jurassic-Cretaceous intraplate granitoids in Eastern China as a consequence of paleo-Pacific plate subduction
Hong, Di1,2,3; Niu, Yaoling1,2,4,5; Xiao, Yuanyuan1,2; Sun, Pu1,2; Kong, Juanjuan1,2,3; Guo, Pengyuan1,2; Shao, Fengli6; Wang, Xiaohong1,2; Duan, Meng5; Xue, Qiqi5; Gong, Hongmei1,2; Chen, Shuo1,2
2018-12-01
Source PublicationLITHOS
ISSN0024-4937
Volume322Pages:405-419
Corresponding AuthorHong, Di(hd_ice@live.com) ; Niu, Yaoling(yaoling.niu@durham.ac.uk)
AbstractJurassic-Cretaceous granitoids are widespread in eastern continental China and have been considered by many as resulting from paleo-Pacific subduction. However, the actual mechanism of their petrogenesis remains speculative. In order to address this important problem and on the basis of our regional study, we hypothesized that the coastal granitoids may result directly from the paleo-Pacific plate subduction, whereas the widespread granitoids in the continental interiors ultimately result from dehydration of the paleo-Pacific slab stagnated in the mantle transition zone (Niu et at., 2015). Here, we present the very first study testing this hypothesis. We sampled 18 Jurassic-Cretaceous granitoid plutons along a similar to 1300 km long traverse parallel to the inferred paleo-Pacific subduction from the southeast coastline to the Xiaoqinling in the continental interiors and carried out a detailed study on these plutonic samples, including zircon U-Pb geochronology, bulk-rock major and trace element compositions and Sr-Nd-Pb-Hf isotopic characteristics. These plutons give varying zircon crystallization ages of similar to 146 to 100 Ma. They are mostly granitic and minor granodioritic, quartz monzonitic and syenitic in composition, enriched in large ion lithophile elements (LILEs), depleted in high field-strength elements (HFSEs) and have varying negative Sr and Eu anomalies. The plutons in the continental interiors show significant positive correlations of Nd (epsilon(Nd) (t) = -25.5 to -10.9) and Hf (epsilon(Hf) (t) = -31.5 to -11.3) isotopes with Pb isotopes (Pb-206/Pb-204 (t) = 15.827 to 17.622), with the enriched endmember characterized by low epsilon(N)(d) (t), epsilon(Hf) (t) and Pb-206/Pb-204 (t). The plutons towards the coastal region have relatively high epsilon(N)(d) (t) (-9.0 to -5.2), epsilon(Hf) (t) (-11.2 to -4.1) and Pb-206/Pb-204 (t) (18.051 to 18.349). The coastal granitoids are best explained as resulting directly from subduction slab dehydration induced mantle wedge melting and resultant crustal anatexis, whereas the interior granitoids are best interpreted as resulting from mature crustal anataxis caused by basaltic magmatism associated with mantle lithosphere thinning, ultimately triggered by dehydration of paleo-Pacific slab stagnant in the mantle transition zone. (C) 2018 Elsevier B.V. All rights reserved.
KeywordJurassic-cretaceous granitoids in eastern China Lithosphere thinning Basal hydration weakening Paleo-Pacific plate subduction Crustal melting
DOI10.1016/j.lithos.2018.10.027
Indexed BySCI
Language英语
Funding ProjectMarine Geological Process and Environment[U1606401] ; NSFC[41630968] ; Chinese Academy of Sciences[Y42217101L] ; 111 Project of China[B118048]
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000452817700026
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/155763
Collection海洋地质与环境重点实验室
Corresponding AuthorHong, Di; Niu, Yaoling
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
5.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China
6.Linyi Univ, Inst Geol & Paleontol, Linyi 276000, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Hong, Di,Niu, Yaoling,Xiao, Yuanyuan,et al. Origin of the Jurassic-Cretaceous intraplate granitoids in Eastern China as a consequence of paleo-Pacific plate subduction[J]. LITHOS,2018,322:405-419.
APA Hong, Di.,Niu, Yaoling.,Xiao, Yuanyuan.,Sun, Pu.,Kong, Juanjuan.,...&Chen, Shuo.(2018).Origin of the Jurassic-Cretaceous intraplate granitoids in Eastern China as a consequence of paleo-Pacific plate subduction.LITHOS,322,405-419.
MLA Hong, Di,et al."Origin of the Jurassic-Cretaceous intraplate granitoids in Eastern China as a consequence of paleo-Pacific plate subduction".LITHOS 322(2018):405-419.
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