globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.04.026
Scopus记录号: 2-s2.0-85019149790
论文题名:
Lake-sediment based paleoseismology: Limitations and perspectives from the Swiss Alps
作者: Kremer K.; Wirth S.B.; Reusch A.; Fäh D.; Bellwald B.; Anselmetti F.S.; Girardclos S.; Strasser M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 168
起始页码: 1
结束页码: 18
语种: 英语
英文关键词: Alps ; Holocene ; Lake sediments ; Mass-movement deposits ; Paleoepicentre ; Paleoseismology ; Sediment deformation
Scopus关键词: Deformation ; Deposits ; Geophysics ; Lakes ; Sedimentology ; Sediments ; Seismology ; Alps ; Holocenes ; Lake sediments ; Mass movement ; Paleoepicentre ; Paleoseismology ; Sediment deformation ; Earthquakes
英文摘要: In regions with moderate seismicity and large intervals between strong earthquakes, paleoseismological archives that exceed the historical and instrumental timescale are needed to establish reliable estimates of earthquake recurrence for long return periods. In several regions, lake sediments have shown to be suitable for paleoseismological studies by causally linking characteristic sedimentological features to historic earthquakes. Studies on single lakes, however, do neither allow determining the paleoepicentre nor the paleomagnitude for the potential paleoearthquakes. Here we compile, using shaking-induced mass movements and micro deformations (summarized as Sedimentary Event Deposits SEDs), the sedimentary paleoseismic record of 11 lakes from Switzerland over the last 10,000 years. The large dating uncertainty attributed to such deposits (up to 250 years) does not allow us to conclusively test for one large earthquake hypothesis when comparing the different lake records and therefore represents one of the major limitations of this approach. Instead, using a new approach of exploring the normalized frequency of occurrence averaged over a larger area, the compiled dataset reveals striking periods of enhanced occurrence of SEDs in the studied lakes during several phases of the past 10,000 years, centered at 9700, 6500 and during the last 4000 cal yr BP. Moreover, we use a calibrated intensity attenuation relation in order to model scenarios of possible epicentral areas and ranges of magnitudes of paleoearthquakes. We differentiate two cases: (i) a ‘single-earthquake’ scenario if SEDs occur simultaneously in various studied lakes, or (ii) a ‘multi-earthquake’ scenario if SEDs in the studied lakes cluster within a time interval. The modelled scenarios allow us to propose maximally possible magnitudes of large paleoearthquakes, constituting an important input for seismic hazard assessment in the Swiss Alps. © 2017 Elsevier Ltd
资助项目: The authors thank all master students that helped to better understand the individual lake systems of Switzerland. We thank Irka Hajdas for radiocarbon dating. Michael Strupler and Christian Möck are acknowledged for their help on data presentation. K.K., S.W., A.R. and M.S. were funded by the Swiss National Science Foundation (project number PP00P2_133481). K.K. was also funded by the Swiss Seismological Service (ETH Zurich). K.K. is currently funded by the Swiss National Science Foundation (Project number PMPDP2_171318). Several previous SNSF funds from the last decade allowed building our dataset 200021-121666, 200020-146889, 206021-133790 and CRSII2-147689. We thank Marc De Batist and an anonymous reviewer for their reviews that significantly improved this article.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59194
Appears in Collections:过去全球变化的重建

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作者单位: Geological Institute, ETH Zurich, Sonneggstrasse 5, Switzerland; Swiss Seismological Service, ETH Zurich, Sonneggstrasse 5, Zurich, Switzerland; Centre for Hydrogeology and Geothermics, University of Neuchâtel, Emile-Argand 11, Neuchâtel, Switzerland; Department of Geosciences, University of Bremen, Gebäude GEO, Klagenfurter Strasse 2, Bremen, Germany; Department of Earth Sciences, University of Bergen, Postboks 7803, Bergen, Norway; Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Baltzerstrasse 1+3, Bern, Switzerland; Department of Earth Sciences and Institute for Environmental Sciences, University of Geneva, Rue des Maraîchers 13, Geneva, Switzerland; Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck, Austria

Recommended Citation:
Kremer K.,Wirth S.B.,Reusch A.,et al. Lake-sediment based paleoseismology: Limitations and perspectives from the Swiss Alps[J]. Quaternary Science Reviews,2017-01-01,168
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