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首页> 外文期刊>Bulletin de la Societe Geologique de France >The Puente Genave-Castelo de Vide shear zone (southern Central Iberian Zone, Iberian Massif): geometry, kinematics and regional implications
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The Puente Genave-Castelo de Vide shear zone (southern Central Iberian Zone, Iberian Massif): geometry, kinematics and regional implications

机译：Puente Genave-Castelo de Vide剪切带（伊比利亚地块南部伊比利亚中部南部）：几何学，运动学和区域意义

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摘要

This paper is concerned with the existence and the salient characteristics of an extensional shear zone (the Puente Génave-Castelo de Vide shear zone) along 400 km in the southern Central Iberian Zone. This shear zone is almost parallel to the previous Variscan structures, but it is slightly cross-cut by the discontinuous late Carboniferous Alburquerque-Pedroches batholithic alignment (which has been considered by some authors to be a fundamental feature for the sub-zonation of the Iberian Massif). The shear zone dips towards the S or SW, showing a top-to-the-S sense of movement. Early ductile deformation was concentrated along a band of andalusite-rich carbonaceous shales in the shear zone, but this can also be recognized in the footwall, particularly in the eastern sector, where the southern border of the (pre- to syn-kinematic) Santa Elena stock was intensely sheared; later intrusion of dyke-swarms agrees with the extensional stress field. Finally the shear zone appears brecchiated and bounded by two brittle faults. From a regional point of view, the shear zone described separates rocks with some differences regarding their stratigraphic, igneous and structural characteristics. These differences, and their precise limits, have been the basis for numerous subdivisions of this part of the Iberian Massif during the last decades. It is our contention that if any subzonation of the southern Central Iberian Zone is to be made (namely eg : Obejo-Valsequillo Domain, Lusitan-Marianic Domain), its northern boundary should be the Puente Génave-Castelo de Vide shear zone. As for the southern boundary, it is located in the Badajoz-Córdoba suture that separates the Central Iberian Zone from the Ossa-Morena Zone.
机译：本文关注伊比利亚南部中部<400 km处的伸展剪切带（PuenteGénave-Castelo de Vide剪切带）的存在和显着特征。 sup> 区域。该剪切带几乎与以前的Variscan 结构平行，但被不连续的 late石炭纪阿尔伯克基-佩德罗奇岩心路线 稍微横切。 （某些作者认为这是伊比利亚地块分区的基本 功能）。剪切区 朝向S或SW倾斜，显示了从顶部到S的运动方向。早期的韧性变形集中在剪切带中的 富含红柱石的碳质页岩带上，但是这也可以在下盘壁上看到，特别是 在东部地区，（从前运动运动到运动运动的）圣埃伦娜股票的南部边界受到强烈剪切；堤防群的后来 入侵与张应力 场一致。最终，剪切带呈弧形并被两个脆性断层包围。从区域的角度来看，所描述的剪切 带将岩石分离，这些岩石在 地层，火成岩和构造特征方面存在一些差异。 这些差异以及在过去的几十年中，它们的精确极限一直是伊比利亚地块 的这一部分众多细分的基础。我们的争辩是，如果要对伊比利亚南部中部地区进行任何分区（sup> （即例如， ：Obejo-Valsequillo域，Lusitan-Marianic域），则其北部< sup> 边界应为PuenteGénave-Castelode Vide 剪切区。至于南部边界，它位于 Badajoz-Córdoba缝合线中，该缝合线将伊比利亚中部 区与Ossa-Morena区域分隔开。

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  • 来源
    《Bulletin de la Societe Geologique de France》 |2006年第4期|191-202|共12页
  • 作者

    Luis Miguel Martín Parra; Francisco González Lodeiro; David Martínez Poyatos; Jerónimo Matas;

  • 作者单位

    Instituto Geológico y Minero de Espa?a, La Calera 1, 28760 Tres Cantos, Madrid, Espagne. lm.martin@igme.es, j.matas@igme.es;

    Departamento de Geodinámica, Universidad de Granada, 18071 Granada, Espagne. djmp@ugr.es, lodeiro@ugr.es;

    Departamento de Geodinámica, Universidad de Granada, 18071 Granada, Espagne. djmp@ugr.es, lodeiro@ugr.es;

    Instituto Geológico y Minero de Espa?a, La Calera 1, 28760 Tres Cantos, Madrid, Espagne. lm.martin@igme.es, j.matas@igme.es;

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