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DOI	10.1029/2020GL087362
	Is There a Nascent Plate Boundary in the Northern Indian Ocean?
	Coudurier-Curveur A.; Karakaş Ç.; Singh S.; Tapponnier P.; Carton H.; Hananto N.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	The northern Indian Ocean has been widely recognized as an area of broadly distributed deformation within the composite India-Australia-Capricorn plate, hosting several diffuse boundary zones and a diffuse triple junction. The occurrence, along reactivated fracture zones, of the exceptionally large (Mw = 8.6 and Mw = 8.2) 2012 Wharton Basin strike-slip earthquakes, however, questions whether this composite plate is breaking apart along a discrete boundary. Using recent bathymetric and seismic data, we analyze the most prominent fracture zone (F6a), whose structural trace is particularly well expressed. We identify 60 kilometric-scale pull-apart basins with geometric properties (length/width ratios) similar to those observed along continental strike-slip plate boundaries. Four of the pull-aparts formed above narrow, subvertical faults extending into the oceanic crust. Within the broad Wharton deformation zone, the significant slip rates (0.8 to 2.5 mm/yr) and unusually large coseismic displacements recorded along F6a suggest that it may be a nascent plate boundary. ©2020. The Authors.
英文关键词	Deformation; Seismology; Co-seismic displacement; Composite plates; Diffuse boundaries; Discrete boundaries; Distributed deformation; Geometric properties; Northern indian oceans; Strike-slip earthquakes; Plates (structural components); deformation mechanism; displacement; display behavior; earthquake event; fracture zone; oceanic crust; plate boundary; seismic data; strike-slip fault; Australia; Indian Ocean; Indian Ocean (North); Wharton Basin
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170510
作者单位	Earth Observatory of Singapore, Nanyang Technological University, Singapore; Equipe de Géosciences Marines, Institut de Physique du Globe de Paris (CNRS, Paris Diderot, Sorbonne Paris Cité), Paris Cedex 05, France; Schlumberger Research Center, Stavanger, Norway; Institute of Crustal Dynamics, China Earthquake Administration, Haidian, Beijing, China; Research Center for Oceanography, Indonesian Institute of Sciences, Jakarta Utara, Indonesia
推荐引用方式 GB/T 7714	Coudurier-Curveur A.,Karakaş Ç.,Singh S.,et al. Is There a Nascent Plate Boundary in the Northern Indian Ocean?[J],2020,47(7).
APA	Coudurier-Curveur A.,Karakaş Ç.,Singh S.,Tapponnier P.,Carton H.,&Hananto N..(2020).Is There a Nascent Plate Boundary in the Northern Indian Ocean?.Geophysical Research Letters,47(7).
MLA	Coudurier-Curveur A.,et al."Is There a Nascent Plate Boundary in the Northern Indian Ocean?".Geophysical Research Letters 47.7(2020).