More than seventy strain studies in the Egyptian Nubian Shield (ENS) are reviewed in this contribution. For the Hammamat basin strain studies, Rf/ϕ and Fry methods have been applied to pebble sections, mudcracks and raindrop prints. Consideration of pebble fabrics in undeformed outcrops suggests that R_XZ estimates of less than 1.7 based on pebble ellipse data are doubtful. Extracted pebbles are also popular strained objects for analysis. Average Wadell sphericity and percentage of blades assist recognition of pebble strains in the Kareim, Queih, Igla and Seleimat basins. Feiran gneissic complex strains, measured using boudins and folds are much higher (X/Z > 15) than the reported strains for the Hafafit gneissic complex (X/Z usually < 2.5) that used metamorphic grain shapes and centres. The low Hafafit strains may result from progressive resetting of grain shapes and relocation of grains by diffusional effects during HT metamorphism. The Barramiya-Mubarak thrust belt provides a good example of focused study on ENS shear zones strain, with variable correlations between Rf/ϕ and Fry results, but consistently low k values. South Eastern Desert (SED) shear zone prolate strain ellipsoids record the effects of multiple deformation. The extensional shear zone overlying the Meatiq complex shows extreme strain and strongly prolate strain ellipsoids. ENS vorticity studies, applying PAR and RGN methods, have yielded higher W_m (> 0.5) for transpressional shears (Barramiya-Mubarak belt and Atalla shear zone) than for transtensional shears (Wm < 0.5). Volume strains have rarely been considered in the ENS, though evidence exists for negative (due to pressure solution) and positive (due to microveining) volume change during deformation. The ENS strain database can be improved by better documentation of sampling methods; better knowledge of primary fabrics; and by testing strain results using a range of materials. AMS-strain studies may broaden the range of lithologies suitable for strain measurement.

这项贡献对埃及努比亚盾（ENS）的70多个应变研究进行了综述。对于Hammamat盆地应变研究，Rf / ϕ和Fry方法已应用于卵石剖面，泥裂和雨滴印记。对未变形露头的卵石织物的考虑表明，R _XZ根据卵石椭圆数据得出的估计值小于1.7值得怀疑。提取的鹅卵石也是用于分析的常用应变对象。Wadell球体的平均球形度和叶片百分比有助于识别Kareim，Queih，Igla和Seleimat盆地的卵石应变。使用布丁和褶皱测量的费朗片麻岩复合物菌株（X / Z> 15）比报道的使用变质晶粒形状和中心的哈法菲特片麻岩复合物（X / Z通常<2.5）高得多。低Hafafit应变可能是由于HT变质过程中的扩散效应导致晶粒形状逐渐复位和晶粒重新定位所致。Barramiya-Mubarak逆冲带提供了一个集中研究ENS剪切带应变的好例子，Rf / ϕ和Fry结果之间具有可变的相关性，但k值始终较低。东南沙漠（SED）剪切带扁长应变椭球记录了多次变形的影响。Meatiq复合体上的拉伸剪切带显示出极大的应变和强烈的长形应变椭球。使用PAR和RGN方法进行的ENS涡度研究产生了更高的W对于压变剪（Barramiya-Mubarak带和Atalla剪切带），_m（> 0.5）大于对张剪（Wm <0.5）。ENS中很少考虑体积应变，尽管有证据表明变形期间体积变化为负（由于压力溶液）和正变化（由于微静脉）。ENS应变数据库可以通过更好地记录采样方法来改进；更好地了解基本面料；并通过使用多种材料测试应变结果。AMS应变研究可以拓宽适用于应变测量的岩性范围。