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Intra-oceanic arc: Its formation and evolution
Wu FuYuan1,2; Wang JianGang1; Liu ChuanZhou1,2; Liu Tong1; Zhang Chang1; Ji WeiQiang1
2019
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume35Issue:1Pages:1-15
AbstractAccording to the theory of plate tectonics, plate boundary is the locus of the various geological processes shaping our Earth, and thus the focus of the modern geology. It is generally accepted that the plate boundaries can be divided into three types, i. e. , divergent (mid-oceanic ridge) , convergent (subduction and collision zones) , and strike-slip (transform fault). As for the convergent boundary, it can be further subdivided into intra-oceanic arc by oceanic-oceanic subduction, Andean continental arc by oceanic-continental subduction, and collisional belt by continental-continental collision. The intra-oceanic arc is relatively less studied compared to other types of convergent boundary. Traditionally, the Japanese islands were thought as an intra-oceanic arc, but this point of view is not hold anymore since it was found that they are fragments from the Asian continental margin. According to the available investigations, intra-oceanic arcs are mostly located along the western Pacific Ocean, represented by the Izu-Bonin-Mariana arc between the Pacific and Philippine plates, and the southwestern (SW) Pacific arc between the Pacific and Australian plates. The most important topic for the study of the intra-oceanic arc is that how subduction was initiated between oceanic-oceanic plates. It is mostly thought that the transform fault can make contact of the different aged oceanic plates, and subsequently in this case that the older and dense lithosphere can underthrust beneath the younger and less-dense plate, which is also ascribed as "Subduction Initial Rule-SIR". However, no actual example was found to date on the Earth for the situation described above, and moreover, it is hard to understand that the intra-oceanic arcs are extensively developed in SW Pacific, although the transform faults occurs everywhere in the seafloor. Data compilation indicates that the above intra-oceanic arcs are in fact continental relics rifted from the Australian continent. The subduction of the old and dense Pacific plate resulted in formation of the continental arc and associated back-arc basin, and the spreading within the back-arc basin then rifted the arc and made it evolved toward oceanic lithosphere. Therefore, the oceanic-oceanic subduction is not valid theoretically, and not documented in the geological records either. However, in the Caribbean, Scotia and Aleutian areas, the intra-oceanic arcs were formed by subduction jump and polarity reverse due to subduction of oceanic plateau. Whatever, the spontaneous initial subduction model needs further geological data to be verified.
KeywordIntra-oceanic arc Oceanic-oceanic subduction Oceanic-continental subduction Back-arc extension Ophiolite
DOI10.18654/1000-0569/2019.01.01
WOS KeywordIZU-BONIN-MARIANA ; INDIA-ASIA COLLISION ; TROODOS OPHIOLITIC COMPLEX ; WEST PHILIPPINE BASIN ; SUBDUCTION INITIATION ; CONTINENTAL-CRUST ; LESSER ANTILLES ; TECTONIC EVOLUTION ; NEW-CALEDONIA ; PLATE-TECTONICS
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000456937400001
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90545
Collection岩石圈演化国家重点实验室
Corresponding AuthorWu FuYuan
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu FuYuan,Wang JianGang,Liu ChuanZhou,et al. Intra-oceanic arc: Its formation and evolution[J]. ACTA PETROLOGICA SINICA,2019,35(1):1-15.
APA Wu FuYuan,Wang JianGang,Liu ChuanZhou,Liu Tong,Zhang Chang,&Ji WeiQiang.(2019).Intra-oceanic arc: Its formation and evolution.ACTA PETROLOGICA SINICA,35(1),1-15.
MLA Wu FuYuan,et al."Intra-oceanic arc: Its formation and evolution".ACTA PETROLOGICA SINICA 35.1(2019):1-15.
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