Inversion of moment tensor focal mechanisms for active stresses around the microcontinent Iberia: Tectonic implications
Inversion of moment tensor focal mechanisms for active stresses around the microcontinent Iberia: Tectonic implications
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伊比利亚微大陆周围活动应力的矩张量震源机制反演：构造意义
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Fernández‐Lozano
中科院分区：
文献类型：
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作者：
G. Vicente;S. Cloetingh;Alfonso Muñoz;A. Olaiz;Daniel Stich;R. Vegas;J. Galindo‐Zaldívar;J. Fernández‐Lozano
伊比利亚微大陆及其相连的洋壳受到欧亚-非洲板块边界变形的影响。从人口的矩张量震源机制的主动应力反演已被执行周围和内部的伊比利亚半岛，共使用213矩张量估计。主要结果如下：（1）张量解与以前从第一P波到达震源机制获得的解相比，显示出更好的一致性和更低的失配。(2)沿着欧亚-非洲西部边界，活动应力的类型逐渐向东变化，从三轴拉伸到单轴压缩沿着Terceira海岭、格洛丽亚断层带和加迪斯湾。(3)在Betics-Alboran-Rif带，单轴伸展占主导地位，Shmax N155°E趋势。(4)在阿尔及利亚北方，再次出现单轴压缩。(5)伊比利亚前陆目前处于走滑到单轴拉伸张量条件下。
The Iberian microcontinent and its connected oceanic crust are affected by deformations related to the Eurasian‐African plate boundary. Active stress inversions from populations of moment tensor focal mechanisms have been performed around and inside the Iberian peninsula, using a total of 213 moment tensor estimates. Main results are as follows: (1) The tensorial solutions show better consistency and lower misfits compared to those obtained previously from first P arrival focal mechanisms. (2) Along the Eurasia‐Africa western boundary, the type of active stresses progressively changes easternward from triaxial extension to uniaxial compression along the Terceira Ridge, the Gloria Fault zone, and the Gulf of Cadiz. (3) In the Betics‐Alboran‐Rif zone, uniaxial extension predominates with Shmax N155°E trending. (4) In northern Algeria, uniaxial compression reappears. (5) The Iberian foreland is currently under strike‐slip to uniaxial extension tensorial conditions.