Climate Change Data Portal
| DOI | 10.1016/j.tecto.2021.228770 |
| The transition zone between the Eastern Alps and the Pannonian basin imaged by ambient noise tomography | |
| Szanyi G.; Gráczer Z.; Balázs B.; Kovács I.J.; AlpArray Working Group | |
| 发表日期 | 2021 |
| ISSN | 00401951 |
| 卷号 | 805 |
| 英文摘要 | The aim of this study was to establish a 3D shear-wave velocity model of the transition zone between the Eastern Alps and the Pannonian basin by means of ambient noise tomography. Datasets from permanent networks as well as past and recently deployed temporary networks of broadband seismic stations have been processed. Empirical Green's functions were estimated via cross-correlation of vertical component ambient seismic noise and further processed to obtain Rayleigh-wave group-velocity dispersion curves. They were directly inverted for shear velocities through a wavelet-based sparsity-constrained tomography method avoiding the intermediate step of constructing 2D group velocity maps. A horizontal resolution of 0.2° in the upper crust and 0.3°–0.5° in the lower crust was achieved. Our upper crustal shear velocity model revealed low velocities in the sedimentary depocenters and high velocities below the surrounding mountains. However, at greater depths (24–29 km), high shear velocities beneath the basins suggest crustal thinning accompanied by mantle updoming. An extremely deep low velocity anomaly was mapped beneath the Vienna basin, which we argue is caused by either sediment transfer to the lower crust; ductile deformation suggested by seismic anisotropy; or the presence of fluids. © 2021 The Authors |
| 关键词 | AlpArrayAmbient noise tomographyCrustal shear velocity modelDirect inversionPannonian basinRayleigh-wave |
| 英文关键词 | Acoustic noise; Group velocity dispersion; Light velocity; Percolation (fluids); Seismology; Shear waves; Structural geology; Tomography; Wave propagation; Ambient noise tomographies; Ambient seismic noise; Broad-band seismic stations; Empirical green's functions; Horizontal resolution; Rayleigh wave group velocities; Shear velocity models; Shear wave velocity models; Shear flow; ambient noise; crustal structure; data inversion; Green function; Rayleigh wave; seismic anisotropy; seismic noise; tomography; transition zone; Alps; Eastern Alps; Pannonian Basin; Vienna Basin |
| 语种 | 英语 |
| 来源期刊 | Tectonophysics
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/208076 |
| 作者单位 | Kövesligethy Radó Seismological Observatory, ELKH CSFK GGI, Budapest, Hungary; MTA EK Lendület Pannon LitH2Oscope Research Group, Budapest, Hungary; Department of Geophysics and Space Science, ELTE TTK, Budapest, Hungary; Environmental Physics Laboratory, ELKH EK EKBI, Budapest, Hungary |
| 推荐引用方式 GB/T 7714 | Szanyi G.,Gráczer Z.,Balázs B.,et al. The transition zone between the Eastern Alps and the Pannonian basin imaged by ambient noise tomography[J],2021,805. |
| APA | Szanyi G.,Gráczer Z.,Balázs B.,Kovács I.J.,&AlpArray Working Group.(2021).The transition zone between the Eastern Alps and the Pannonian basin imaged by ambient noise tomography.Tectonophysics,805. |
| MLA | Szanyi G.,et al."The transition zone between the Eastern Alps and the Pannonian basin imaged by ambient noise tomography".Tectonophysics 805(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
