The Ediacaran (607–593Ma) Ferani volcanic rocks are exposed in South Sinai, at the extreme northern tip of the Arabian- Nubian Shield (ANS). The studied volcanics constitute a cogenetic continuous intermediate (andesite to dacite) to acid (rhyodacite to rhyolite) lava sequence with a high-K calc-alkalinemetaluminous to slightly peraluminous nature. They contain a high concentration of large-ion lithophile elements (i.e., Ba, Rb, Pb, andTh), but lower contents ofNb, P, Ti, and Sr. They also have a general enrichment in light rare earth elements ((La=Sm)N p 2:66–4:92), compared to heavy rare earth elements ((Gd=Yb)N p 1:10–2:29), with a slightly negative Eu anomaly (Eu=Eu
p 0:35–0:94). The cooling of the Feranimagma began at ∼10007–11007Cand went to ∼7007Cat lowpressure (!5.1 kbar) and shallowcrustal levels (!17km), according to thermobarometric modeling. The low degree of partial melting of the mafic lower-crustal rocks could have produced the andesitic-daciticmagmas that ascended through the crust and fractionated, leading to the production of the early intermediate Ferani lavas. Progressive fractional crystallization of the intermediate melts could consequently have formedthe rhyodacite and rhyolite melts, which were later erupted to formthe upper acidic Ferani volcanic sequence. Petrological and geochemical features support a postcollisional setting of the Ferani volcanics. Lithospheric delamination is the main geodynamic process responsible for the formation of the Ferani volcanics during the postcollisional extensional stage in the northern ANS crust.