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DOI	10.1016/j.tecto.2020.228561
	Probing the relationship between electrical conductivity and creep through upper crustal fluids along the western part of the North Anatolian Fault with three-dimensional magnetotellurics
	Karaş M.; Tank S.B.; Ogawa Y.; Oshiman N.; Matsushima M.; Honkura Y.
发表日期	2020
ISSN	00401951
卷号	791
英文摘要	Seismic characteristics of any fault system are affected by the relationship between the relevant stress regime and the fluid content of a region. Under persistent stress accumulation, fluids can facilitate earthquake generation due to their effect on frictional forces. In this study, Armutlu Peninsula serves as a suitable example to investigate the role of fluid-rich environments in seismicity distribution. In the context of electrical resistivity characteristics provided by a fluid-sensitive geophysical method, namely magnetotellurics, seismogenic properties of the western part of the North Anatolian Fault are examined from its mechanical attributes to fault – fluid relationship. Near the epicenter of the catastrophic 1999 İzmit Earthquake, Hersek region appears as a fluid-rich environment between shallow creeping and aseismic strain releasing portions that bound highly resistive Armutlu Peninsula. Conductor related to fluid-rich environment extends until depth of approx. 10 km and precludes earthquake activity along the fault zone. High amount of fluids concentrated on particular conductive regions, may restrain earthquake distribution with the absence of mechanically strong structures around the fault zone. As a potential asymmetric damage zone appears around the NAF, both aftershock distributions of the 1999 İzmit Earthquake in the following three months and long-term earthquake data show a clear tendency for concentration on resistive parts of the study area. Fluid-rich regions possibly indicate the endpoints of the segments in the NAF. The final electrical resistivity model produced in this study reveals that interpreting tectonic, seismic or geological aspects of any fault system can plausibly be dependent on counting spatial extensions of fluid-rich environments. In order to correctly assemble interdisciplinary findings, it may be essential to consider more features than vertical extensions of conductive zones which, mostly indicate fluid-bearing regions. © 2020 Elsevier B.V.
关键词	Armutlu Peninsula Creep Electrical resistivity Fluids Magnetotellurics North Anatolian Fault
英文关键词	Electric conductivity; Faulting; Magnetotellurics; Aftershock distributions; Earthquake activity; Electrical conductivity; Geophysical methods; Mechanical attributes; North Anatolian Fault; Stress accumulation; Vertical extension; Earthquakes; aftershock; creep; earthquake epicenter; electrical conductivity; electrical resistivity; magnetotelluric method; North Anatolian Fault; seismicity; upper crust; Armutlu Peninsula; Turkey
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/207787
作者单位	Boğaziçi University, Kandilli Obs. & E.R.I., Çengelköy, İstanbul, Turkey; İstanbul Technical University, Faculty of Mines, Dept. of Geophysics, Maslak, İstanbul, Turkey; Tokyo Institute of Technology, Volcanic Fluid Research Center, Ookayama, Tokyo, Japan; Kyoto University, Disaster Prevention Research Center, Uji, Japan; Tokyo Institute of Technology, Dept. of Earth and Planetary Sci., Ookayama, Tokyo, Japan
推荐引用方式 GB/T 7714	Karaş M.,Tank S.B.,Ogawa Y.,et al. Probing the relationship between electrical conductivity and creep through upper crustal fluids along the western part of the North Anatolian Fault with three-dimensional magnetotellurics[J],2020,791.
APA	Karaş M.,Tank S.B.,Ogawa Y.,Oshiman N.,Matsushima M.,&Honkura Y..(2020).Probing the relationship between electrical conductivity and creep through upper crustal fluids along the western part of the North Anatolian Fault with three-dimensional magnetotellurics.Tectonophysics,791.
MLA	Karaş M.,et al."Probing the relationship between electrical conductivity and creep through upper crustal fluids along the western part of the North Anatolian Fault with three-dimensional magnetotellurics".Tectonophysics 791(2020).