The Neoproterozoic basement complex of the western segment of the Allaqi Shear Zone (ASZ) in the extreme southern part of the Egyptian Nubian Shield comprises four main lithologic units: gneisses, amphibolites, island arc metasediments, and intrusives. In the present study, these units investigated at the outcrop scale, as well as petrographically and geochemically. Gneisses are subdivided into three types: hornblende, muscovite, and biotite gneisses. The hornblende and muscovite gneisses have para-gneissic origin, while the biotite gneiss has igneous protolith. Amphibolites have intermediate andesitic to basaltic andesite composition, with igneous origin, and were formed in island-arc environments. The metagabbros are subalkaline and have within-plate geochemical characteristics. The metasediments involve graphite-muscovite, albite, chlorite, biotite-muscovite, carbonate, and tremolite-actinolite schists, in addition to metagreywackes. The bulk chemistry of metasedimentary succession revealed their formation within active continental margin setting with pelitic to semi-pelitic and psammitic precursor. The previously mentioned lithologic units are poly deformed and intensively affected by shearing and thrusting. These structures strike in various direction: WNW-ESE, NNE-SSW, NW-SE, NW-SE, and E-W, which are consistent with the automatic and manual principal component analyses (PCA) lineament extraction.

埃及努比亚盾构最南端的阿拉奇剪切带（ASZ）西部段的新元古代基底复合体包括四个主要岩性单元：片麻岩，闪石，岛弧变质岩和侵入岩。在本研究中，这些单元在露头规模以及岩石学和地球化学方面进行了调查。片麻岩分为三种类型：角闪石，白云母和黑云母片麻岩。角闪石和白云母片麻岩起源于准片麻岩，而黑云母片麻岩具有火成的原生岩。闪石具有中等的安山岩到玄武岩安山岩成分，具有火成因，并在岛弧环境中形成。变质岩属于碱性以下，具有板内地球化学特征。变质沉积物包括石墨白云母，钠长石，绿泥石，黑云母，白云母，碳酸盐和透闪石-阳起石片岩，以及变质黑云母。沉积沉积的大体化学结果表明它们是在活跃的大陆边缘环境中形成的，形成有胶体到半胶体和叠层前体。先前提到的岩性单元是多变形的，并且受到剪切和推力的强烈影响。这些结构朝着不同的方向发展：WNW-ESE，NNE-SSW，NW-SE，NW-SE和EW，与自动和手动主成分分析（PCA）谱系提取相一致。先前提到的岩性单元是多变形的，并受到剪切和推力的强烈影响。这些结构朝着不同的方向发展：WNW-ESE，NNE-SSW，NW-SE，NW-SE和EW，与自动和手动主成分分析（PCA）谱系提取相一致。先前提到的岩性单元是多变形的，并且受到剪切和推力的强烈影响。这些结构朝着不同的方向发展：WNW-ESE，NNE-SSW，NW-SE，NW-SE和EW，与自动和手动主成分分析（PCA）谱系提取相一致。