DOI: 10.1016/j.tecto.2019.228286
论文题名: Contemporary stress and strain field in the Mediterranean from stress inversion of focal mechanisms and GPS data
作者: Martínez-Garzón P. ; Heidbach O. ; Bohnhoff M.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 774 语种: 英语
中文关键词: Earthquake focal mechanisms
; High resolution stress field orientation mapping
; Maximum horizontal stress
; Mediterranean region
; Plate tectonic forces
; World stress Map
英文关键词: Global positioning system
; Information use
; Maps
; Seismology
; Stress-strain curves
; Tensors
; Comprehensive stress field
; Data availability
; Earthquake focal mechanisms
; Strain accumulations
; Strain rate tensors
; Stress and strain
; Stress orientations
; Stress-field orientation
; Strain rate
; complexity
; focal mechanism
; geological mapping
; GPS
; heterogeneity
; performance assessment
; plate tectonics
; resolution
; strain
; stress field
; Mediterranean Region
英文摘要: Mapping the contemporary stress field of the Mediterranean provides fundamental insights on the complexity of plate tectonic forces throughout the region and at different depths. Despite increased data availability and methodological improvements, most recent comprehensive stress field characterization across the entire Mediterranean dates back to 1995. To extend the regional stress information, we use all earthquake focal mechanisms compiled in the World Stress Map database release 2016 for a formal stress inversion. Our main goals are to (1) improve the resolution of the stress field orientation, (2) evaluate the performance of the recently refined stress inversion methodology in a tectonically complex region, (3) test the hypothesis of a depth-dependent stress orientation heterogeneity, and (4) compare different types of stress and strain observations from surface using the GPS-derived information on the strain rate tensor down to the seismogenic crust using summation of normalized seismic potencies. The obtained stress orientations generally capture the main seismotectonic features, including tectonically complex settings such as the Alpine Orogeny or the Ionian Sea. The orientation of the maximum horizontal stress SHmax tends to be uniform with depth within uncertainties while larger stress heterogeneity (quantified by means of the focal mechanism diversity and misfit angles) is found between 5 and 14 km. Both, the orientation of the largest horizontal shortening axis of the strain field from potency tensors, and horizontal strain rate tensor from GPS data are generally sub-parallel to SHmax orientation, indicating a linear stress/strain relationship and that the orientations of the co-seismic release and interseismic strain accumulation are generally consistent. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170657
Appears in Collections: 气候变化与战略
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作者单位: Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, 14473, Germany; Institute of Geological Sciences, Free University of Berlin, Berlin, Germany
Recommended Citation:
Martínez-Garzón P.,Heidbach O.,Bohnhoff M.. Contemporary stress and strain field in the Mediterranean from stress inversion of focal mechanisms and GPS data[J]. Tectonophysics,2020-01-01,774