DOI: 10.1007/s11069-020-04362-5
论文题名: Assessing post-pliocene deformation in a context of slow tectonic deformation: insights from paleoseismology, remote sensing and shallow geophysics in Provence, France
作者: Thomas F. ; Rizza M. ; Bellier O. ; Billant J. ; Dussouillez P. ; Fleury J. ; Delanghe D. ; Ollivier V. ; Godard V. ; Talon B.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 105, 期: 2 起始页码: 1453
结束页码: 1490
语种: 英语
中文关键词: 14C dating
; Electric tomography
; Grain size distribution
; LiDAR
; OSL dating
; Paleoseismology
; Seismic hazard
; Slow deformation
英文关键词: deformation
; grain size
; lidar
; luminescence dating
; paleoseismicity
; Pliocene
; remote sensing
; seismic hazard
; seismology
; size distribution
; tectonics
; tomography
; France
; Provence
英文摘要: The Provence region, located in the south-east of France, has experienced a few destructive earthquakes during the last centuries, such as the 1909 Lambesc earthquake or the 1509 and 1708 Manosque earthquakes. However, faults in the area experience slow slip rates (< 0.1 mm/yr) that preclude quantification of deformation using geodetic measurements. Active faults in Provence have long recurrence intervals, and the region experiences erosion under a Mediterranean climate where surface markers of such deformation are rapidly erased. As a consequence, several faults in the region may go unnoticed despite having the potential to generate earthquakes. This work focuses on the Vinon-sur-Verdon area in Provence, where a relatively narrow fault structure, the Maragrate fault, brings into contact Miocene clays and Pliocene conglomerates. Because of its proximity to a major nuclear research facility, this fault poses a potential earthquake hazard that justifies studies aimed at gaining insight into its mechanics and Quaternary seismic activity. In this context, a multi-disciplinary approach has been implemented. A LiDAR campaign was undertaken to generate a 30-cm high-resolution Digital Elevation Model that depicts in detail the current fault morphology. In parallel, an electrical resistivity campaign was conducted and three trenches were opened. These investigations revealed a fault contact expressed by a fault gouge zone surmounted and sealed by numerous recent Quaternary periglacial and high-energy channel units. Radiocarbon and optically stimulated luminescence dating allowed the chronological reconstruction of sediment deposition and erosion cycles and of the most recent deformation event, older than 20 ka. These investigations did not allow us to demonstrate with certainty that these deformations are of a co-seismic nature. This work highlights the difficulty of identifying faults and studying the seismic hazard in intra-continental contexts. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169403
Appears in Collections: 气候变化与战略
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作者单位: Aix Marseille Univ., CNRS, IRD, INRAE, College De France, CEREGE, Aix-en-Provence, France; Aix Marseille Univ., CNRS, FR 3098 ECCOREV, Aix-en-Provence, 13545, France; Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France; Aix Marseille Univ., CNRS, Minist Culture and Com, LAMPEA, Aix-en-Provence, France; Aix Marseille Univ., Avignon Université, CNRS, IRD, IMBE, Aix-en-Provence, France
Recommended Citation:
Thomas F.,Rizza M.,Bellier O.,et al. Assessing post-pliocene deformation in a context of slow tectonic deformation: insights from paleoseismology, remote sensing and shallow geophysics in Provence, France[J]. Natural Hazards,2021-01-01,105(2)