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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
刊名	ACTA PETROLOGICA SINICA
	2019
卷号	35期号:1页码:1-15
关键词	Intra-oceanic arc Oceanic-oceanic subduction Oceanic-continental subduction Back-arc extension Ophiolite
ISSN号	1000-0569
DOI	10.18654/1000-0569/2019.01.01
英文摘要	According 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.
WOS关键词	IZU-BONIN-MARIANA ; INDIA-ASIA COLLISION ; TROODOS OPHIOLITIC COMPLEX ; WEST PHILIPPINE BASIN ; SUBDUCTION INITIATION ; CONTINENTAL-CRUST ; LESSER ANTILLES ; TECTONIC EVOLUTION ; NEW-CALEDONIA ; PLATE-TECTONICS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000456937400001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90545]
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	Wu FuYuan
作者单位	1.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
推荐引用方式 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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