The Kid Metamorphic Complex (KMC), in the southeastern area of the Sinai Peninsula, Egypt, is an approximately 1500 m thick volcano-sedimentary succession. The Um Zariq (UZ) Formation represents the lowermost stratigraphic unit in the KMC. The KMC is underplated and intruded along its western margin by granites. There is strong evidence for granitoid underplating of the entire KMC succession; the granitic magmas provide the main source of heat for the regional high-temperature, low-pressure metamorphism in the area. In addition to a banded iron formation at Samara area, a skarn-type base and precious-metal mineralization are recently discovered in Um Zariq area—the lowest stratigraphic unit in the succession. Three sulfide ore types describe large-scale metal zoning. These include Cu–Zn–Co in calc–silicate rocks, and Pb–Zn and Zn–Pb–As–Ag in metapelites. The Cu-rich ore is dominated by chalcopyrite, bornite and sphalerite. The Pb–Zn ore in the metapelites forms small massive lenses consisting mainly of galena. The other metapelite-hosted mineralization is recorded at depth and comprises sphalerite, arsenopyrite, pyrite, lollingite, galena, chalcopyrite and pyrrhotite, with variable modal proportions. Five silver-bearing minerals were documented from the Pb–Zn ore, i.e., freibergite “(Ag, Zn, Fe)12Sb4S13”, zoubekite (AgPb4Sb4S10), miargyrite (AgSbS2), pyrargyrite (Ag3SbS3) and boulangerite (Sb2Pb2S5). The sulfides and their host rocks experienced an amphibolite facies metamorphism involving temperatures of 500–620 °C at pressures 2.1–4.2 kbar. Metamorphic monazite from Um Zariq yields a Th–Pb isochron age of 660 ± 25 Ma for the main metamorphic event that prevailed. Overall structural and textural relationships of silicate and sulfide minerals favor syn-tectonic formation during granitoid emplacement in a continental margin setting. The Wadi Kid area is highly prospective for Cu, Zn, Pb and Ag mineralization.