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Subduction initiation in the Neo-Tethys and formation of the Bursa ophiolite in NW Turkey

文献类型：期刊论文

作者Xin, Guang-Yao1,4,5; Chu, Yang1,4,5; Su, Ben-Xun1,3,5; Lin, Wei1,4,5; Cui, Meng-Meng1,3,5; Liu, Xia1,3,5; Uysal, Ibrahim2; Li, Ji -Lei1,3,5; Feng, Zhen-Tian1,4,5
刊名LITHOS
出版日期2022-08-01
卷号422页码:17
ISSN号0024-4937
关键词Bursa ophiolite Mafic dike Metamorphic sole Subduction initiation Neo-Tethys
DOI10.1016/j.lithos.2022.106746
英文摘要Subduction of oceanic lithosphere is the primary driver for plate tectonics on earth, but a paucity of geological records hinders our understanding of how subduction is initiated. Two general mechanisms have been proposed -induced and spontaneous nucleation of subduction zones. For both mechanisms, subduction inception begins with initial lower plate burial, but whether upper plate extension and magmatic activity coincide with, or are later than, lower plate underthrusting is the key to identifying spontaneous or induced subduction initiation. Here we present geological, geochemical and geochronological characteristics of mafic dikes and amphibolites from the Bursa ophiolite in NW Turkey, to identify the mechanism of the subduction initiation of the Neo-Tethys Ocean. The mafic dikes are depleted in light rare earth elements (LREE) and slightly enriched in large-ion lithophile elements (LILE), which together with high epsilon Nd(t) values and low 207Pb/204Pb ratios, indicate a MORB-like mantle source similar to the earliest forearc basalts (FAB) of the Izu-Bonin-Mariana subduction initiation system. Zircon U-Pb geochronology shows a crystallization age of 89.8 +/- 0.9 Ma. In contrast, the amphibolites are enriched in LREE and LILE, and have low epsilon Nd(t) values and high 207Pb/204Pb ratios, suggesting an E-MORB-like geochemical affinity. Zircon U-Pb ages of the amphibolites reveal that the metamorphism occurred at 96.4 & PLUSMN; 1.9 Ma, representing the initial burial of the lower plate. Thus, subduction predated upper plate extension and formation of the Bursa oceanic crust by 9.4-3.8 Myr, arguing for induced subduction of Neo-Tethyan lithosphere that formed the Bursa ophiolite.
WOS关键词U-PB ; BASALTS ; ZIRCON ; SOLE
资助项目National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[91855103] ; National Natural Science Foundation of China[41872208] ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP)[2019QZKK0801] ; State Key Laboratory of Lithospheric Evolution[SKL-Q201801] ; Youth Innovation Promotion Association[2019065] ; Chinese Academy of Sciences
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者ELSEVIER
WOS记录号WOS:000807570700002
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expe-dition and Research Program (STEP) ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Youth Innovation Promotion Association ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/106059]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Chu, Yang
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkey
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Xin, Guang-Yao,Chu, Yang,Su, Ben-Xun,et al. Subduction initiation in the Neo-Tethys and formation of the Bursa ophiolite in NW Turkey[J]. LITHOS,2022,422:17.
APA Xin, Guang-Yao.,Chu, Yang.,Su, Ben-Xun.,Lin, Wei.,Cui, Meng-Meng.,...&Feng, Zhen-Tian.(2022).Subduction initiation in the Neo-Tethys and formation of the Bursa ophiolite in NW Turkey.LITHOS,422,17.
MLA Xin, Guang-Yao,et al."Subduction initiation in the Neo-Tethys and formation of the Bursa ophiolite in NW Turkey".LITHOS 422(2022):17.

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来源：地质与地球物理研究所

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