Granites of the Gabal Nugrus pluton (GNP) are exposed in the northern part of the South Eastern Desert of Egypt, in the northwestern corner of the Arabian-Nubian Shield (ANS). Field investigations reveal that the granites represent the youngest igneous activity in the area and are intrusive into or faulted against ophiolitic m & eacute;lange and metavolcanics. The pluton is an elliptical intrusion that is elongated in a NW-SE direction. Two main granitic phases are distinguished in the GNP. The early phase consists of syenogranite, whereas the young phase is alkali feldspar granite. The early phase is deformed, especially along the margins of the pluton, while the young phase is undeformed and intruded into the early phase with sharp or gradational contacts. The most important rare-metal minerals are columbite and tantalite, present only in the alkali feldspar granite. Geochemically, the granites show a range of silica contents (73.64-77.13 wt%) and different degrees of trace element enrichment. Variations in the chemical composition of the granites of the GNP are progressive, without any compositional gaps between the two phases, demonstrating that they form a cogenetic suite. They show enrichment in the light rare earth elements (LREEs) relative to heavy REEs ((La/Lu)n=4.18-7.72), and all samples have strong negative Eu anomalies ((Eu/Eu*)=0.13-0.41). The Nugrus granites are either peraluminous or metaluminous and have many features characteristic of A-type granite, typical of those emplaced in a postcollisional setting at the final stage in the evolution of the ANS. The overall chemical characteristics are consistent with evolution through fractional crystallization from a single parental magma. They were generated through partial melting of young juvenile crust following lithospheric delamination and uprise of asthenospheric mantle. The fractionation of feldspars played a major role in the evolution of the Nugrus granites, with only a minor contribution from the mafic minerals, Fe-Ti oxides, and apatite. The presence of sparse mafic xenoliths in the syenogranite suggests a potentially small effect due to crustal contamination.