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Seismotectonics of Portugal and its adjacent Atlantic area

机译:葡萄牙及其邻近大西洋地区的地震构造

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摘要

A study of focal mechanisms of earthquakes and stress indicators are presented for Portugal and its adjacent Atlantic margins. Recently Riberio et al. (1996) published a work on this subject. In this study, we introduce new focal mechanisms of nine earthquakes. We use these results together with 12 other focal mechanisms and the main tectonic features in the region to define more accurately the type of mechanism and the stress pattern of the region. All the focal mechanisms used in this study differ partially but are compatible with the regional stress held. The stress indicators resulting from focal mechanisms and other geological and geophysical data show that the Portugal continental and its Atlantic margins are under horizontal pressure in NNW-SSE direction, with a greater proportion of strike-slip and reverse-oblique mechanisms for the whole area. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 28]
机译:对葡萄牙及其邻近大西洋边缘的地震震源机制和应力指标进行了研究。最近,Riberio等人。 (1996)发表了关于这个主题的著作。在这项研究中,我们介绍了九次地震的新震源机制。我们将这些结果与该地区的其他12个震源机制和主要构造特征一起使用,以更准确地定义该地区的机制类型和应力模式。本研究中使用的所有焦点机制部分不同,但与所承受的区域压力兼容。由震源机制和其他地质和地球物理数据得出的应力指标表明,葡萄牙大陆及其大西洋边缘在NNW-SSE方向受到水平压力,整个地区的走滑和反斜向机制所占比例较大。 (C)2001 Elsevier Science B.V.保留所有权利。 [参考:28]

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