气候变化领域集成服务门户(CCPortal): Shallow fault systems of thrust anticlines responding to changes in accretionary prism lithology (Nankai, SE Japan)

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DOI	10.1016/j.tecto.2021.228888
	Shallow fault systems of thrust anticlines responding to changes in accretionary prism lithology (Nankai, SE Japan)
	Maunde A.; Alves T.M.; Moore G.F.
发表日期	2021
ISSN	00401951
卷号	812
英文摘要	Three-dimensional (3D) pre-stack depth migrated seismic data are used to analyse the geometry and growth of shallow faults associated with tectonic shortening in four (4) prominent thrust anticlines off Nankai, SE Japan. The four thrust anticlines show a trenchward increase in horizontal shortening and deform the seafloor at present. They shortened the overburden strata by 7143 m in the Late Quaternary, reflecting a horizontal shortening of 32.9% in response to plate subduction. A significant number of closely spaced and segmented fault arrays is observed in their hinge regions. Vertically segmented fault arrays with local throw maxima between 5 and 14 m relate to the existence of more competent (strong) intervals, or layers. Incompetent (weak) intervals record relatively small throw values between 2 and 5 m. We show that the presence of closely spaced, segmented fault arrays at shallow stratigraphic levels can have a significant impact on local stress distribution, controlling near-seafloor strain in accretionary prisms as Nankai's. The observed mechanical layering is likely to continue at depth to control the accumulation of tectonic stress in faults posed to reactivate during seismic events. © 2021 Elsevier B.V.
关键词	Fault growth Mechanical stratigraphy Nankai Trough Segment linkage Subduction zones Tectonic shortening
英文关键词	Lithology; Prisms; Seismology; Stratigraphy; Accretionary prism; Late quaternary; Local stress distribution; Plate subduction; Shallow faults; Tectonic shortening; Tectonic stress; Threedimensional (3-d); Faulting; accretionary prism; anticline; fault; lithology; seafloor; stratigraphy; subduction zone; tectonic structure; thrust; China; Nankai; Tianjin
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/208026
作者单位	3D Seismic Laboratory, School of Earth and Environmental Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom; Department of Geology, School of Physical Sciences, Modibbo Adama University of Technology, P.M.B, Yola, 2076, Nigeria; Department of Earth Sciences, University of Hawaii, 1680 East-West Rd, Honolulu, HI 96822, United States
推荐引用方式 GB/T 7714	Maunde A.,Alves T.M.,Moore G.F.. Shallow fault systems of thrust anticlines responding to changes in accretionary prism lithology (Nankai, SE Japan)[J],2021,812.
APA	Maunde A.,Alves T.M.,&Moore G.F..(2021).Shallow fault systems of thrust anticlines responding to changes in accretionary prism lithology (Nankai, SE Japan).Tectonophysics,812.
MLA	Maunde A.,et al."Shallow fault systems of thrust anticlines responding to changes in accretionary prism lithology (Nankai, SE Japan)".Tectonophysics 812(2021).