DOI: 10.1016/j.epsl.2020.116686
论文题名: Shear-wave velocity structure beneath the Dinarides from the inversion of Rayleigh-wave dispersion
作者: Belinić T. ; Kolínský P. ; Stipčević J. ; the AlpArray Working Group
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 555 语种: 英语
中文关键词: collision
; Dinarides
; lithosphere
; surface waves
英文关键词: Acoustic wave velocity
; Geodynamics
; Phase velocity
; Rayleigh waves
; Shear waves
; Structural geology
; Central Mediterranean
; Lithospheric delaminations
; Low velocity zones
; Rayleigh-wave dispersion
; Rayleigh-wave phase velocity
; Shear wave velocity
; Shear wave velocity models
; Shear wave velocity structure
; Shear flow
; collision
; data inversion
; geodynamics
; Rayleigh wave
; S-wave
; seismic velocity
; three-dimensional modeling
; velocity structure
; wave dispersion
英文摘要: The interaction between the Adriatic microplate (Adria) and Eurasia is the main driving factor in the central Mediterranean tectonics. Their interplay has shaped the geodynamics of the whole region and formed several mountain belts including Alps, Dinarides and Apennines. Among these, Dinarides are the least investigated and little is known about the underlying geodynamic processes. There are numerous open questions about the current state of interaction between Adria and Eurasia under the Dinaric domain. One of the most interesting is the nature of lithospheric underthrusting of Adriatic plate, e.g. length of the slab or varying slab disposition along the orogen. Previous investigations have found a low-velocity zone in the uppermost mantle under the northern-central Dinarides which was interpreted as a slab gap. Conversely, several newer studies have indicated the presence of the continuous slab under the Dinarides with no trace of the low velocity zone. Thus, to investigate the Dinaric mantle structure further, we use regional-to-teleseismic surface-wave records from 98 seismic stations in the wider Dinarides region to create a 3D shear-wave velocity model. More precisely, a two-station method is used to extract Rayleigh-wave phase velocity while tomography and 1D inversion of the phase velocity are employed to map the depth dependent shear-wave velocity. Resulting velocity model reveals a robust high-velocity anomaly present under the whole Dinarides, reaching the depths of 160 km in the north to more than 200 km under southern Dinarides. These results do not agree with most of the previous investigations and show continuous underthrusting of the Adriatic lithosphere under Europe along the whole Dinaric region. The geometry of the down-going slab varies from the deeper slab in the north and south to the shallower underthrusting in the center. On-top of both north and south slabs there is a low-velocity wedge indicating lithospheric delamination which could explain the 200 km deep high-velocity body existing under the southern Dinarides. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165408
Appears in Collections: 气候变化与战略
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作者单位: KrakenSystems Ltd, Zagreb, Croatia; Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria; Department of Geophysics, University of Zagreb, Zagreb, Croatia
Recommended Citation:
Belinić T.,Kolínský P.,Stipčević J.,et al. Shear-wave velocity structure beneath the Dinarides from the inversion of Rayleigh-wave dispersion[J]. Earth and Planetary Science Letters,2021-01-01,555