Large earthquakes along slow converging plate margins:Calabrian Arc paleoseismicity based on the submarine turbidite record
作者机构：Istituto di Scienze Marine(ISMAR-CNR)Consiglio Nazionale delle RicercheArea della Ricerca di BolognaItaly Dipartimento di Matematica e GeoscienzeUniversitàdegli Studi di TriesteItaly Presidenza del Consiglio dei MinistriDipartimento della Protezione CivileServizio Rischio Sismico-RomaItaly
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2023年第14卷第5期
页 面：241-266页
核心收录：
学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学]
基 金：Institute of Marine Sciences Consiglio Nazionale delle Ricerche, CNR
主 题：Calabrian Arc Earthquakes Seismic shaking Sedimentation Seismo-turbidites
摘 要：The Calabrian Arc subduction-rollback system hosts seismogenic faults capable of generating earthquakes exceeding magnitude *** earthquakes are the result of long-term geodynamic processes,documenting seismic activity during a sufficiently long time interval is of fundamental importance for hazard *** and historical data provide critical information on seismogenesis,but they cover time periods shorter than the recurrence times of large earthquakes,especially in areas with low deformation rates such as *** onshore paleoseismological studies are fundamental to compile earthquake catalogs,they are sometime affected by the relatively poor continuity of sedimentation in the subaerial *** this study we applied the paleoseismological approach to the submarine environment to reconstruct the record of high-energy sedimentary events triggered by seismic *** analyzed three gravity cores collected in disconnected sedimentary basins to reconstruct resedimentation processes during the Holocene,integrating inland information for a better assessment of tectonic activity and *** analyses of the sedimentary record constrained by radiometric dating allowed reconstructing event stratigraphy and linking resedimented deposits to specific *** and offshore data allow to identify large-magnitude earthquakes in the central Calabrian Arc subduction system during the Holocene,with inferred epicenters located either along normal faults onshore and/or related to the slab *** turbidite record reveals 20 major events during the last 10 ka,with sources including crustal faults in Calabria(***,Rossano and Cittanova faults).Analyses of sediment samples and high-resolution seismic reflection images allowed identification of different types of resedimented deposits during the last 30–50 *** basin-wide occurrence of three megaturbidites/homogenites suggests they are related to megatsunamis sourced by
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