Large-scale metal zoning in a late-Precambrian skarn-type mineralization, Wadi Kid, SE Sinai, Egypt

• A large scale polymetallic sulfide mineralization from SE Sinai is described.
• Regional geologic setting, silicate and sulfide mineralogy specify a skarn-type.
• Syn-tectonic intrusions provided ore fluids that deposited along major structures.
• Mineralization witnessed peak metamorphic event and re-equilibrated during cooling.

A Precambrian skarn-type mineralization is recently discovered in the Wadi Kid area in southeast Sinai, Egypt. Two sulfide ore types define large scale metal zoning; Cu–Zn–Co in calc-silicate rocks and Zn–Pb–As–Ag in metapelites. The sulfides and host rocks underwent amphibolite facies metamorphism (2.1–4.2 kbar and 500–620 °C). Dating by the chemical Th–U-total Pb isochrone method yields an Th–Pb isochrone age of 660 ± 25 Ma for metamorphic monazite from metapelites. Overall structural and textural relationships of silicate and sulfide minerals favor syn-tectonic formation during granitoids emplacement in a continental margin setting. Large-scale metal zoning reflects variable distances from the causative pluton(s). The Wadi Kid area is highly prospective for Cu, Zn, Pb and Ag mineralization.