Abstract
Research Article| November 01, 1992 Northward expulsion of the Pan-African of northeast Africa guided by a reentrant zone of the Tanzania craton F. F. Bonavia; F. F. Bonavia 1Université Pierre et Marie Curie, Département de Géotectonique (URA-CNRS 1315), Case 129, 4 Place Jussieu, 75252 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar J. Chorowicz J. Chorowicz 1Université Pierre et Marie Curie, Département de Géotectonique (URA-CNRS 1315), Case 129, 4 Place Jussieu, 75252 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Author and Article Information F. F. Bonavia 1Université Pierre et Marie Curie, Département de Géotectonique (URA-CNRS 1315), Case 129, 4 Place Jussieu, 75252 Paris Cedex 05, France J. Chorowicz 1Université Pierre et Marie Curie, Département de Géotectonique (URA-CNRS 1315), Case 129, 4 Place Jussieu, 75252 Paris Cedex 05, France Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1992) 20 (11): 1023–1026. https://doi.org/10.1130/0091-7613(1992)020<1023:NEOTPA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation F. F. Bonavia, J. Chorowicz; Northward expulsion of the Pan-African of northeast Africa guided by a reentrant zone of the Tanzania craton. Geology 1992;; 20 (11): 1023–1026. doi: https://doi.org/10.1130/0091-7613(1992)020<1023:NEOTPA>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract In southern Ethiopia and northern Kenya, higher grade Neoproterozoic rocks of the Mozambique orogenic belt and lower grade Arabian-Nubian shield are juxtaposed. Because both belts formed from a collision with African cratons (Tanzania, Eastern Sahara), the region of transition is interpreted to represent the root of northward expulsion of the Arabian-Nubian shield from the Mozambique orogenic belt. In this region, the northwest-trending late Mesozoic Kenyan rift, the Cenozoic Northern Kenyan rift, and the Main Ethiopian rift form a rift complex across Pan-African structures. In the model discussed here of successive thrusts throughout Pan-Africa, expulsion was guided either by subvertical or flat-lying faults along zones of decollement and decoupling. A northwest-trending reentrant zone in the Tanzania craton (one side of an indenter) guided the penetration of the Mozambique orogenic belt. The other side was the Schliesen-Mwembeshi-Chimaliro zone in central Africa. The interpreted structure has similarities with the gravity and magnetic pattern in the Kenyan rift. This suggests that Pan-African deformation in this region controlled late Mesozoic and Cenozoic rifting. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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