期刊
EARTH AND PLANETARY SCIENCE LETTERS
卷 389, 期 -, 页码 14-22出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.epsl.2013.12.019
关键词
seismic anisotropy; Anatolia-Aegean region; SKS wave; upper mantle structure; mantle flow
资金
- Agence Nationale de la Recherche (France) [ANR-06-BLAN-0317]
- Agence Nationale de la Recherche (ANR) [ANR-06-BLAN-0317] Funding Source: Agence Nationale de la Recherche (ANR)
A better understanding of what drives surface motion in the rapidly deforming Aegean-Anatolia region requires the comparison of mantle circulation models with reliable and densely spaced seismic anisotropy data. We present a new set of 4279 high-quality splitting data of core-refracted shear waves measured at 216 permanent and temporary broadband seismic stations in Turkey and Greece, and their neighboring countries. When combined with previously published observations, our dataset provides unprecedented dense spatial coverage of the area. The delay time between the fast and slow shear waves is highest in the northern Aegean Sea and northwestern Anatolia (average, 1.5 +/- 0.4 s) and lowest in the southern Aegean Sea (average, 0.6 +/- 0.4 s). The fast-wave polarization axes are oriented NE-SW over most of Anatolia and the northern Aegean Sea. These show steady counterclockwise rotation of 1 degrees per degree of longitude from eastern Anatolia to the northern Aegean. The only exceptions to this uniform pattern are NNW-SSE to NW-SE orientations in mainland Greece, and NW-SE orientations in the southwestern corner of Anatolia. The overall anisotropy pattern can be explained by instantaneous density-driven mantle flow with additional local effects, such as slab rollback in the Aegean Sea and a slab window beneath southwestern Anatolia. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据