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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
Yang, Hao1,2; Ge, Wen-Chun1,3,6; Santosh, M.4,5; Ji, Zheng1; Dong, Yu1; Jing, Yan1; Wu, Hao-Ran1
2022-03-01
Source PublicationGONDWANA RESEARCH
ISSN1342-937X
Volume103Pages:297-313
AbstractIntra-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.
KeywordIntra-oceanic arc Continental fragment Bainaimiao arc system Sr-Nd-Hf-O isotopes
DOI10.1016/j.gr.2021.10.009
Funding OrganizationNational 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
WOS KeywordZIRCON U-PB ; ASIAN OROGENIC BELT ; PLASMA-MASS SPECTROMETRY ; SUBDUCTION INITIATION ; INNER-MONGOLIA ; KHANKA MASSIF ; ISLAND ARCS ; CRUSTAL EVOLUTION ; WORKING REFERENCE ; INTRUSIVE ROCKS
Language英语
Funding ProjectNational Natural Science Foundation of China[41802049] ; National Natural Science Foundation of China[42072064]
Funding OrganizationNational 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
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000804188800004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106006
Collection岩石圈演化国家重点实验室
Corresponding AuthorGe, Wen-Chun
Affiliation1.Jilin Univ, Coll Earth Sci, Changchun, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
3.Minist Nat Resources China, Key Lab Mineral Resources Evaluat Northeast Asia, Changchun 130061, Peoples R China
4.China Univ Geosci Beijing, Sch Earth Sci & Resources, 29 Xueyuan Rd, Beijing 100083, Peoples R China
5.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia
6.Jilin Univ, Coll Earth Sci, 2199 Jianshe St, Changchun 130061, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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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