Were aspects of Pan-African deformation linked to Iapetus opening?

Abstract

Research Article| December 01, 1996 Were aspects of Pan-African deformation linked to Iapetus opening? Anne Grunow; Anne Grunow 1Byrd Polar Research Center, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Richard Hanson; Richard Hanson 2Department of Geology, Texas Christian University, Fort Worth, Texas 76129 Search for other works by this author on: GSW Google Scholar Terry Wilson Terry Wilson 3Department of Geological Sciences and the Byrd Polar Research Center, Ohio State University, Columbus, Ohio 43210 Search for other works by this author on: GSW Google Scholar Geology (1996) 24 (12): 1063–1066. https://doi.org/10.1130/0091-7613(1996)024<1063:WAOPAD>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 Anne Grunow, Richard Hanson, Terry Wilson; Were aspects of Pan-African deformation linked to Iapetus opening?. Geology 1996;; 24 (12): 1063–1066. doi: https://doi.org/10.1130/0091-7613(1996)024<1063:WAOPAD>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 The convergence recorded in some Pan-African deformational belts (sensu lato) in South America, Africa, Madagascar, southern India, Sri Lanka, and Antarctica is temporally correlated with opening of the Iapetus ocean. We propose a model in which continent-continent collision and closure of the Adamastor ocean between the Amazon–West African–Rio de La Plata cratons and the São Francisco–Congo–Kalahari cratons in the late Neoproterozoic are linked to rifting and orthogonal spreading between Laurentia and the South American cratons. By the Early Cambrian, the cratons in South America and Africa were assembled as West Gondwana. Closure of the Mozambique ocean, which appears to have extended across Antarctica between Lützow-Holm Bay and the Shackleton Range, resulted in continued convergence between the Congo–Kalahari–Queen Maud Land block and East Gondwana in the Cambrian. Coeval deformation in the Transantarctic Mountains may be related to the obliquity of the Antarctic margin relative to Iapetus spreading directions. Initiation of voluminous arc magmatism along the paleo-Pacific margin of Gondwana in the Early Cambrian is broadly synchronous with the cessation of intra-Gondwana Pan-African deformation, possibly reflecting a change in plate motions at the time of final Gondwana assembly. The new subduction regime along the Gondwana margin in the Early Cambrian may be linked to the closure of the Iapetus ocean basin. 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.