ABSTRACT
The crust of the Arabian-Nubian Shield (ANS) formed during the 900–550 Ma Pan-African events by modern-type plate tectonic processes. This involved accretion of intra-oceanic arc/back arc basin complexes as well as continental microplates. The location and extend of Late Proterozoic sutures in the ANS have been well established. The discovery of a series of ESE- to SE-verging ophiolitic nappe remnants in the Delgo area near River Nile and in the Atmur area suggests the existence of a suture zone in Northern Sudan. The ophiolitic bodies' line up to form a NNE to ENE striking narrow belt which extends from the western margin of the ANS, into an area that was commonly accepted to be part of a pre-Pan-African craton. This suture appears to terminate in the east against the Keraf zone. The discovery of the Atmur-Delgo suture requires a fundamental re-examination of several aspects of the tectonic relationship between the ANS and the older, remobilized foreland of the "Nile Craton".
