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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
The role of continental fragments in the formation of intra-oceanic arcs: Constraints from Sr-Nd-Hf-O isotopes of gabbro from the Jiamusi Block, NE China

文献类型：期刊论文

作者Yang, Hao1,6; Ge, Wen-Chun2,5,6; Santosh, M.3,4; Ji, Zheng6; Dong, Yu6; Jing, Yan6; Wu, Hao-Ran6
刊名GONDWANA RESEARCH
出版日期2022-03-01
卷号103页码:297-313
ISSN号1342-937X
关键词Intra-oceanic arc Continental fragment Bainaimiao arc system Sr-Nd-Hf-O isotopes
DOI10.1016/j.gr.2021.10.009
英文摘要Intra-oceanic arcs are potential candidates that generate Earth's continental crust, and serve as active sites for the mixing of juvenile arc and mature continental material. However, whether continental frag-ments occur beneath intra-oceanic arcs, and how continental materials are involved in island arc magmas remain equivocal. Here we report zircon U-Pb-Hf-O isotopes and whole-rock elemental and Sr-Nd iso-topic data on the Silurian island arc gabbro from the southeastern Jiamusi Block in NE China. The gabbro was emplaced at ca. 435-429 Ma associated with the northward intra-oceanic subduction of the Paleo-Asian Ocean, and belongs to the eastern extension of the Bainaimiao arc system. Elevated zircon d18O (+5.5 & PTSTHOUSND; to +7.9 & PTSTHOUSND;) and variable epsilon(Hf)(t) (-2.1 to +4.0) values, and negative whole rock epsilon(Nd)(t) (-1.1 to-1.6) values, suggest an enriched mantle component generated by pelagic and terrigenous sediments input into the mantle wedge. The contribution of terrigenous sediments, together with the recognition of Paleoproterozoic crustal rocks, proves for the first time that continental fragments existed beneath the intra-oceanic arc. In conjunction with published data, we propose that that Tarim Craton-type scat-tered continental fragments occurred within the Bainaimiao arc system, and that they not only facilitated the initiation of oceanic-oceanic subduction through increasing buoyancy, but also account for the old continental zircon and enriched isotopic variations of the young arc rocks. Our study highlights a fossil example that could help better quantify the scale and role of continental fragments in the origin and evo-lution of intra-oceanic arcs.(C) 2021 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; ASIAN OROGENIC BELT ; PLASMA-MASS SPECTROMETRY ; SUBDUCTION INITIATION ; INNER-MONGOLIA ; KHANKA MASSIF ; ISLAND ARCS ; CRUSTAL EVOLUTION ; WORKING REFERENCE ; INTRUSIVE ROCKS
资助项目National Natural Science Foundation of China[41802049] ; National Natural Science Foundation of China[42072064]
WOS研究方向Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000804188800004
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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/106006]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Ge, Wen-Chun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
2.Minist Nat Resources China, Key Lab Mineral Resources Evaluat Northeast Asia, Changchun 130061, Peoples R China
3.China Univ Geosci Beijing, Sch Earth Sci & Resources, 29 Xueyuan Rd, Beijing 100083, Peoples R China
4.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia
5.Jilin Univ, Coll Earth Sci, 2199 Jianshe St, Changchun 130061, Peoples R China
6.Jilin Univ, Coll Earth Sci, Changchun, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Hao,Ge, Wen-Chun,Santosh, M.,et al. The role of continental fragments in the formation of intra-oceanic arcs: Constraints from Sr-Nd-Hf-O isotopes of gabbro from the Jiamusi Block, NE China[J]. GONDWANA RESEARCH,2022,103:297-313.
APA Yang, Hao.,Ge, Wen-Chun.,Santosh, M..,Ji, Zheng.,Dong, Yu.,...&Wu, Hao-Ran.(2022).The role of continental fragments in the formation of intra-oceanic arcs: Constraints from Sr-Nd-Hf-O isotopes of gabbro from the Jiamusi Block, NE China.GONDWANA RESEARCH,103,297-313.
MLA Yang, Hao,et al."The role of continental fragments in the formation of intra-oceanic arcs: Constraints from Sr-Nd-Hf-O isotopes of gabbro from the Jiamusi Block, NE China".GONDWANA RESEARCH 103(2022):297-313.

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来源：地质与地球物理研究所

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