globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116152
论文题名:
A 3800 yr paleoseismic record (Lake Hazar sediments, eastern Turkey): Implications for the East Anatolian Fault seismic cycle
作者: Hubert-Ferrari A.; Lamair L.; Hage S.; Schmidt S.; Çağatay M.N.; Avşar U.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 538
语种: 英语
中文关键词: creep ; East Anatolian Fault ; paleoseismology ; seismic shaking ; turbidites
英文关键词: Creep ; Earthquake effects ; Lakes ; Magnetic susceptibility ; Sediments ; Coarse-grained sediments ; Historical earthquakes ; Loss on ignition ; Mean recurrence intervals ; Paleoseismology ; Seismic shaking ; turbidites ; X-ray fluorescence measurement ; Strike-slip faults ; active fault ; creep ; fault zone ; geodesy ; lacustrine deposit ; paleoseismicity ; sediment core ; seismology ; strike-slip fault ; turbidite ; Elazig [Turkey] ; Hazar Lake ; Turkey
英文摘要: The East Anatolian Fault (EAF) in Turkey is a major active left-lateral strike-slip fault that was seismically active during the 19th century but mostly quiet during the 20th century. Geodetic data suggests that the fault is creeping along its central part. Here we focus on its seismic history as recorded in the sediments of Lake Hazar in the central part of the EAF. Sediment cores were studied using X-ray imagery, magnetic susceptibility, grain-size, loss-on-ignition and X-ray fluorescence measurements. Recurring thin, coarse-grained sediment units identified as turbidites in all cores were deposited synchronously at two deep study sites. The turbidite ages are inferred combining radiocarbon and radionuclide (137Cs and 210Pb) dating in an Oxcal model. A mean recurrence interval of ∼190 yrs is obtained over 3800 yrs. Ages of the recent turbidites correspond to historical earthquakes reported to have occurred along the EAF Zone or to paleoruptures documented in trenches just northeast of Lake Hazar. The turbidites are inferred to be earthquake-triggered. Our record demonstrates that Lake Hazar has been repeatedly subjected to significant seismic shaking over the past 3800 yrs. The seismic sources are variable: ∼65% of all turbidites are associated with an EAF source. The seismic cycle of central EAF is thus only partly impacted by creep. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165041
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作者单位: University of Liège, Department of Geography, clos Mercator 3, Liège, 4000, Belgium; National Oceanography Centre Southampton, University of Southampton, United Kingdom; EPOC, Université de Bordeaux, France; Istanbul Teknik Universitesi, EMCOL Research Centre, İstanbul, Turkey; Middle East Technical University, Faculty of Engineering, Geological Engineering, Ankara, Turkey

Recommended Citation:
Hubert-Ferrari A.,Lamair L.,Hage S.,et al. A 3800 yr paleoseismic record (Lake Hazar sediments, eastern Turkey): Implications for the East Anatolian Fault seismic cycle[J]. Earth and Planetary Science Letters,2020-01-01,538
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