Late Proterozoic magmatism in the Nakasib suture, Red Sea Hills, Sudan

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doi: 10.1144/gsjgs.151.3.0485
Authors:Schandelmeier, H.; Abdel-Rahman, E. M.; Wipfler, E.; Küster, D.; Utke, A.; Matheis, G.
Author Affiliations:Primary:
TU Berlin, SFB 69, Berlin, Federal Republic of Germany
Geological Research Authority of Sudan, Sudan
Volume Title:Journal of the Geological Society of London
Source:Journal of the Geological Society of London, Vol.151(Part 3), p.485-497. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0016-7649
Publication Date:1994
Note:In English. 54 refs.; illus. incl. 5 tables, geol. sketch maps
Summary:The SW part of this suture is characterized by a distinct litho- stratigraphic and geochemical zonation from N to S. The S part of the suture zone is underlain by the Ariab volcanic arc which is separated from the adjacent Oshib ophiolite melange to the N by a major thrust. Basalts of the Oshib ophiolite complex vary from N to S from typical MORB through OIB to boninitic lavas. The volcanic sequences of the Ariab island arc consist of minor tholeiitic and major calc-alkaline intermediate to felsic volcanic and plutonic rocks. Subduction-related calc-alkaline granitic rocks (approx 810 m.y.) were intruded into the N margin of the 890-840 m.y. old Haya terrain along the S boundary of the Nakasib suture zone. All the evidence indicates that the Nakasib ocean basin was consumed in the late Proterozoic by a southerly dipping subduction zone. [R.A.H.]
Subjects:Island arcs; Neoproterozoic; Ophiolite; Plate tectonics; Precambrian; Proterozoic; Subduction; Suture zones; Upper Precambrian; Africa; East Africa; Red Sea Hills; Sudan; Ariab island arc; Igneous activity; Nakasib Suture
Abstract Numbers:94M/4880
Record ID:1994030811
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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