The vast, juvenile continental crust province of the Arabian-Nubian Shield formed during the Neoproterozoic, mainly by accretion of intra-oceanic island arcs. Sediments eroded from these arcs are preserved in the Eilat and Roded Metamorphic Complexes located in the northern part of the shield. We present a coupled study of U-Pb-Hf-O isotopes in detrital zircons from metasedimentary units from Eilat area, intended to assess the juvenile nature of the island arcs and to investigate recycling and reworking processes involved in their generation. Detrital zircon geochronology places island arcs activity in this region at 1040-740 Ma, peaking at 850-750 Ma. Arc crustal evolution is demonstrated by coupling Hf and O isotopes in detrital zircons with mantle-like δ18O (5.0-6.5‰). Predominant positive εHf(t) values of +6 to +12 principally reflect juvenile crust formation. A temporally decreasing trend in εHf(t) values implies ~80 m.y. of crustal reworking of island arcs. Reworking is further confirmed by abundant zircons with elevated δ18O values of 6.5‰ to 9‰, indicating assimilation of 18O-rich supracrustal components in arc magmas. Zircon possessing positive and high εHf(t) values with elevated δ18O values suggest assimilation of juvenile sediments most likely derived from the island arc complex itself. Mixing calculations demonstrate that up to 40% of juvenile sediments with assumed δ18O value of 14‰ were assimilated in some of the arc magmas sampled by our zircons. These results imply that incorporation of supracrustal components and reworking of arc terranes were fundamental in the evolution of island arcs in the northern Arabian-Nubian Shield. The contribution of older crust was minor, as just two Paleoproterozoic zircon grains and a small number of Neoproterozoic-aged zircon with lower εHf(t) values were detected. Thus, the island-arc edifice represented by the Eilat detrital zircon was entirely intra-oceanic and remained far from older (pre-Neoproterozoic) continental margin during its entire history.