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Rapid transition from MORB-type to SSZ-type oceanic crust generation following subduction initiation: insights from the mafic dikes and metamorphic soles in the Pozanti-Karsanti ophiolite, SE Turkey

文献类型：期刊论文

作者Xin, Guang-Yao2,4,5; Chu, Yang2,4,5; Su, Ben-Xun2,3,4; Lin, Wei2,4,5; Uysal, Ibrahim1; Feng, Zhen-Tian2,4,5
刊名CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
出版日期2021-09-01
卷号176期号:9页码:20
关键词Ophiolite Mafic dike Metamorphic sole Subduction initiation Magma transition
ISSN号0010-7999
DOI10.1007/s00410-021-01821-5
英文摘要The Pozanti-Karsanti ophiolite is one of the well-preserved supra-subduction-zone oceanic lithosphere slices. It offers a unique opportunity to study oceanic crust formation, and to specify subduction initiation processes of the Inner Tauride ocean in the Neo-Tethyan subduction system. The Pozanti-Karsanti ophiolite is tectonically underlain by a subophiolitic metamorphic sole and melanges. The metamorphic sole is mostly amphibolites that are enriched in light rare earth elements and large-ion lithophile elements, low epsilon(Nd)(t) values (+ 5.4 to + 8.3) and high Pb-207/Pb-204 ratios, suggesting an OIB-like geochemical affinity. Secondary ion mass spectrometry (SIMS) zircon and titanite U-Pb ages reveal a protolith age at similar to 122.2 +/- 1.3 Ma and metamorphic age at 92-90 Ma for the amphibolites. Gabbro and diabase dikes intruded the metamorphic sole rocks and ophiolitic units at similar to 91 to 90 Ma. Their elemental and Sr-Nd-Pb isotopic characteristics indicate a MORB-like mantle source, different from subduction fluid-altered dikes formed at 86.9 +/- 3.1 Ma. The temporal-geochemical sequence therefore suggests that the intra-oceanic subduction initiated at 91.9 +/- 0.8 Ma within an older lithosphere (> 122 Ma) of the Inner Tauride ocean. Incipient subduction led to forearc (ultra-)slow-spreading seafloor with mafic dikes of 91-90 Ma. The fast switch from MORB- to SSZ-type oceanic spreading might have occurred in less than 3 Myr and marks the inception of a mature subduction zone.
WOS关键词TAURIDE BELT OPHIOLITES ; SOUTHERN TURKEY ; SEMAIL OPHIOLITE ; XIGAZE OPHIOLITE ; INTRAOCEANIC SUBDUCTION ; ISOTOPIC CONSTRAINTS ; TETHYAN OPHIOLITES ; OMAN OPHIOLITE ; INDIAN-OCEAN ; SUTURE ZONE
资助项目National Natural Science Foundation of China[91755205] ; National Natural Science Foundation of China[91855103] ; National Natural Science Foundation of China[41772055] ; National Natural Science Foundation of China[41872208] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0801] ; State Key Laboratory of Lithospheric Evolution[SKL-Q201801] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000683332700002
出版者SPRINGER
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 Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition 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, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, 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 Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition 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, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, 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 Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition 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, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, 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 Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Second Tibetan Plateau Scientific Expedition 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, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/101894]  
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.Karadeniz Tech Univ, Dept Geol Engn, Trabzon, Turkey
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Xin, Guang-Yao,Chu, Yang,Su, Ben-Xun,et al. Rapid transition from MORB-type to SSZ-type oceanic crust generation following subduction initiation: insights from the mafic dikes and metamorphic soles in the Pozanti-Karsanti ophiolite, SE Turkey[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2021,176(9):20.
APA Xin, Guang-Yao,Chu, Yang,Su, Ben-Xun,Lin, Wei,Uysal, Ibrahim,&Feng, Zhen-Tian.(2021).Rapid transition from MORB-type to SSZ-type oceanic crust generation following subduction initiation: insights from the mafic dikes and metamorphic soles in the Pozanti-Karsanti ophiolite, SE Turkey.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,176(9),20.
MLA Xin, Guang-Yao,et al."Rapid transition from MORB-type to SSZ-type oceanic crust generation following subduction initiation: insights from the mafic dikes and metamorphic soles in the Pozanti-Karsanti ophiolite, SE Turkey".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 176.9(2021):20.

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来源：地质与地球物理研究所

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