DOI: 10.1016/j.tecto.2020.228353
论文题名: Seismicity and geodynamics of western Peloponnese and central Ionian Islands: Insights from a local seismic deployment
作者: Haddad A. ; Ganas A. ; Kassaras I. ; Lupi M.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 778 语种: 英语
中文关键词: Cephalonia Transform Fault
; Earthquake relocation
; Seismo-tectonics
; Western Greece
英文关键词: Complex networks
; Deformation
; Earthquakes
; Geodynamics
; Offshore oil well production
; Strike-slip faults
; Structural geology
; Transform faults
; Aftershock sequence
; Clockwise rotation
; Complex deformation
; Continental collisions
; Crustal deformations
; Earthquake relocation
; North-western Greece
; Western Greece
; Fault slips
英文摘要: The tectonic setting of western Peloponnese and central Ionian Islands, Greece, is characterized by the subduction of the oceanic African plate beneath the Aegean micro-plate. The transition from subduction to continental collision in northwestern Greece is accommodated by the right-lateral Cephalonia transform fault. In this work, we exploit the recordings of a temporary seismic network composed of 15 stations operating from July 2016 until May 2017 to investigate the complex deformation of this region. Our local network fills in a major observational gap in one of the most tectonically active regions of the Hellenic arc. We detected and located more than 1200 local earthquakes and constrained five 1D optimum local velocity models. The relocated seismicity (including the aftershock sequence that followed the October 2018 Mw 6.7 earthquake offshore Zakynthos) and associated focal mechanisms constrained for the major earthquakes point out a complex crustal deformation. We propose a clockwise rotation of the Ionian Akarnania Block accommodated by major marginal strike-slip fault zones that appear segmented along their strike. Additionally, left-lateral motion is observed on the Kyllini-Cephalonia fault along a north-west direction. Finally, the seismicity recorded in north Cephalonia (offshore Myrtos and Fiskardo) suggests that the Cephalonia transform fault is a large deformation zone where secondary WNW-striking sinistral strike-slip faults occur. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170598
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Sciences, University of Geneva, Switzerland; Institute of Geodynamics, National Observatory of Athens, Athens, 11810, Greece; Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Athens, 15784, Greece
Recommended Citation:
Haddad A.,Ganas A.,Kassaras I.,et al. Seismicity and geodynamics of western Peloponnese and central Ionian Islands: Insights from a local seismic deployment[J]. Tectonophysics,2020-01-01,778