气候变化领域集成服务门户(CCPortal): Rift-parallel block-like motion of the graben floor during the 2005

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DOI	10.1016/j.tecto.2020.228571
	Rift-parallel block-like motion of the graben floor during the 2005–2010 Afar rifting episode
	Himematsu Y.; Furuya M.
发表日期	2020
ISSN	00401951
卷号	791
英文摘要	Crustal deformations associated with rifting episodes are often explained by both normal faulting and tensile opening in an elastic body, suggesting no significant rift-parallel displacements. In this study, using ALOS/PALSAR pixel-offset and multiple aperture interferometry (MAI) data, we detected ~1 m of northwestward block-like cumulative horizontal motion in the graben floor during the latter half of the 2005–2010 Afar rifting episode, Ethiopia. This horizontal block-like motion can be explained by additional shallower strike-slip on normal fault surfaces, which was presumably aseismic due to the very small number of strike-slip earthquakes and a significant gap between seismic and geodetic moment releases. We conclude that the rift-parallel movement can be interpreted by the strain accommodation of plate oblique spreading associated with dike intrusions, as has been demonstrated for the 2014 Bárðarbunga dike intrusion episode. Although we do not propose direct evidence for the plate oblique spreading, the complicated tectonic setting caused by the rotation of the Danakil block and the upwelling plume beneath the Afar triple junction may be drivers of the rift-parallel motion associated with the Afar dike intrusion. © 2020 Elsevier B.V.
关键词	Afar ALOS/PALSAR Pixel tracking Rifting episode Satellite SAR The East African Rift
英文关键词	Earthquakes; Floors; Hydraulic structures; Levees; Strike-slip faults; Crustal deformations; Horizontal motion; Multiple apertures; Normal faulting; Parallel motion; Strain accommodations; Strike-slip earthquakes; Tectonic settings; Fault slips; ALOS; crustal deformation; fault displacement; faulting; graben; interferometry; normal fault; PALSAR; rifting; Afar; Ethiopia
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207770
作者单位	Department of Natural History Sciences, Graduate School of Science, Hokkaido University Sapporo, Japan; Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan; Now at Volcano Disaster Resilience Research Division, National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan
推荐引用方式 GB/T 7714	Himematsu Y.,Furuya M.. Rift-parallel block-like motion of the graben floor during the 2005–2010 Afar rifting episode[J],2020,791.
APA	Himematsu Y.,&Furuya M..(2020).Rift-parallel block-like motion of the graben floor during the 2005–2010 Afar rifting episode.Tectonophysics,791.
MLA	Himematsu Y.,et al."Rift-parallel block-like motion of the graben floor during the 2005–2010 Afar rifting episode".Tectonophysics 791(2020).