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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Characters and strain partitioning of the N-S striking faults and associated structures in the Eastern Desert of Egypt
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Characters and strain partitioning of the N-S striking faults and associated structures in the Eastern Desert of Egypt

机译：埃及东部沙漠N-S撞击断裂及其相关构造的特征和应变划分

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摘要

N-S striking faults appear in the Eastern Desert of Egypt (ED) in an area 90-200 km wide and 550 km long, reaching from the latitude of Hurghada southwards beyond the southern Egyptian borders. Two tectonic phases that produced the N-S faults could be identified. The earlier phase presents a mainly ductile and moderately brittle nature, took place during the Precambrian and resulted in N-S-stretched structures, folds with N-S axes, and N-S trending right-lateral strike-slip faults to which the Hamisana Shear Zone pertains. The later phase shows a mainly brittle character, developed during Phanerozoic times and led to a reactivation of the old right-lateral faults as left-lateral strike-slip faults with an extension component (transtension). The impact of the earlier phase is well developed in the southern part of the area within which the faults are significant (significance area), whereas the structures of the later phase can be observed in the northern part. During the later phase, a pre-existing structural discontinuity, old faults and lithologic boundaries facilitated strain partitioning and non-coaxial strain in the faults' significance area. Wrench displacement vector (V alpha 1) and extension displacement vector (V alpha 2) of the faults are 29 degrees and 90 degrees respectively, whereas the regional displacement vector (V alpha r) is 59 degrees.
机译：N-S地震断层出现在埃及东部沙漠（ED）中，其宽度为90-200 km，长度为550 km，从洪加达纬度向南延伸到埃及南部边界以外。可以识别出产生N-S断层的两个构造相。较早的阶段主要表现为韧性和中等脆性，发生在前寒武纪期间，并导致N-S伸展的构造，N-S轴褶皱以及N-S趋势属于Hamisana剪切带的右走向走滑断层。后期显示出主要为脆性特征，在古生代时期发展，并导致旧的右侧断层重新活化为具有延伸分量的左走向走滑断层（张性）。前期的影响在断层明显的区域的南部（重要区域）发展得很好，而后期的结构可以在北部观察到。在后期阶段，预先存在的结构间断，旧断层和岩性边界促进了断层重要区域的应变分配和非同轴应变。断层的扳手位移矢量（V alpha 1）和延伸位移矢量（V alpha 2）分别为29度和90度，而区域位移矢量（V alpha r）为59度。

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