气候变化领域集成服务门户(CCPortal): Lithospheric strength variations and seismotectonic segmentation below the Sea of Marmara

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DOI	10.1016/j.tecto.2021.228999
	Lithospheric strength variations and seismotectonic segmentation below the Sea of Marmara
	Gholamrezaie E.; Scheck-Wenderoth M.; Cacace M.; Bott J.; Heidbach O.; Bohnhoff M.; Strecker M.R.
发表日期	2021
ISSN	00401951
卷号	815
英文摘要	The Sea of Marmara is a tectonically active basin that straddles the North Anatolian Fault Zone (NAFZ), a major strike-slip fault that separates the Eurasian and Anatolian tectonic plates. The Main Marmara Fault (MMF), which is part of the NAFZ, contains an approximately 150 km long seismotectonic segment that has not ruptured since 1766. A key question for seismic hazard and risk assessment is whether or not the next rupture along this segment is likely to produce one major earthquake or a series of smaller earthquakes. Geomechanical characteristics such as along-strike variations in rock strength may provide an important control on seismotectonic segmentation. We find that variations in lithospheric strength throughout the Marmara region control the mechanical segmentation of the MMF and help explain its long-term seismotectonic segmentation. In particular, a strong crust that is mechanically coupled to the upper mantle spatially correlates with aseismic patches, where the MMF bends and changes its strike in response to the presence of high-density lower crustal bodies. Between the bends, mechanically weaker crustal domains that are decoupled from the mantle indicate a predominance of creeping. These results are highly relevant for the ongoing debate regarding the characteristics of the Marmara seismic gap, especially in view of the seismic hazard (Mw > 7) in the densely populated Marmara region. © 2021 Elsevier B.V.
关键词	Lithospheric strength North Anatolian Fault Zone Rheological modeling Sea of Marmara Seismic gap Thermal modeling
英文关键词	Hazards; Risk assessment; Seismic response; Strike-slip faults; North Anatolian Fault Zone; Rock strength; Sea of Marmara; Seismic gaps; Seismic hazard and risk assessments; Seismic hazards; Seismotectonics; Tectonic plates; Earthquakes; earthquake mechanism; Eurasian plate; fault zone; lithospheric structure; risk assessment; seismic hazard; seismicity; seismotectonics; strike-slip fault; tectonic setting; Anatolia; Sea of Marmara; Turkey; Marmara
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/207976
作者单位	Helmholtz Centre Potsdam–GFZ German Research Centre for Geosciences, Potsdam, Germany; Institute of Geosciences, University of Potsdam, Germany; Faculty of Georesources and Material Engineering, RWTH Aachen, Aachen, Germany; Department of Earth Sciences, Freie University Berlin, Berlin, Germany
推荐引用方式 GB/T 7714	Gholamrezaie E.,Scheck-Wenderoth M.,Cacace M.,et al. Lithospheric strength variations and seismotectonic segmentation below the Sea of Marmara[J],2021,815.
APA	Gholamrezaie E..,Scheck-Wenderoth M..,Cacace M..,Bott J..,Heidbach O..,...&Strecker M.R..(2021).Lithospheric strength variations and seismotectonic segmentation below the Sea of Marmara.Tectonophysics,815.
MLA	Gholamrezaie E.,et al."Lithospheric strength variations and seismotectonic segmentation below the Sea of Marmara".Tectonophysics 815(2021).