Field and remote-sensing data have enabled identification of a previously unrecognized discontinuous belt of ophiolitic nappe remnants in northeastern Sudan. The belt crops out for 200 km in a west southwest to southwest direction from the western margin of the Arabian-Nubian shield into the gneissic terrane previously accepted as part of the Archean to Paleoproterozoic Nile craton. Although highly dismembered and metamorphosed, the belt contains all the components of a Phanerozoic-type ophiolite. The ophiolite belt is interpreted as a suture zone (Atmur-Delgo suture), manifesting collision (∼700 Ma) between a passive-margin terrane in the south with an island-arc terrane in the north, following the consumption of an oceanic basin along a north-dipping subduction zone. Our results indicate that previously recognized crustal provinces in northeastern Africa must be reassessed critically.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.