THE MURCHISON GREENSTONE BELT (SOUTH AFRICA): A GENERAL TECTONIC FRAMEWORK
2012; Geological Society of South Africa; Volume: 115; Issue: 1 Linguagem: Inglês
10.2113/gssajg.115.1.65
ISSN1996-8590
AutoresJustine Jaguin, Denis Gapais, Marc Poujol, Philippe Boulvais, Jean‐François Moyen,
Tópico(s)earthquake and tectonic studies
ResumoResearch Article| March 01, 2012 THE MURCHISON GREENSTONE BELT (SOUTH AFRICA): A GENERAL TECTONIC FRAMEWORK J. JAGUIN; J. JAGUIN Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr Search for other works by this author on: GSW Google Scholar D. GAPAIS; D. GAPAIS Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr Search for other works by this author on: GSW Google Scholar M. POUJOL; M. POUJOL Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr Search for other works by this author on: GSW Google Scholar P. BOULVAIS; P. BOULVAIS Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr Search for other works by this author on: GSW Google Scholar J.-F. MOYEN J.-F. MOYEN Laboratoire Magmas et Volcans, Université Jean Monnet, 42000 Saint-Étienne., e-mail: jean.francois.moyen@univ-st-etienne.fr Search for other works by this author on: GSW Google Scholar Author and Article Information J. JAGUIN Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr D. GAPAIS Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr M. POUJOL Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr P. BOULVAIS Géosciences Rennes, UMR CNRS 6118, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes CEDEX, France., e-mails: justine.jaguin@univ-rennes1.fr, denis.gapais@univ-rennes1.fr, marc.poujol@univ-rennes1.fr, philippe.boulvais@univ-rennes1.fr J.-F. MOYEN Laboratoire Magmas et Volcans, Université Jean Monnet, 42000 Saint-Étienne., e-mail: jean.francois.moyen@univ-st-etienne.fr Publisher: Geological Society of South Africa First Online: 09 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2012 Geological Society of South Africa South African Journal of Geology (2012) 115 (1): 65–76. https://doi.org/10.2113/gssajg.115.1.65 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. JAGUIN, D. GAPAIS, M. POUJOL, P. BOULVAIS, J.-F. MOYEN; THE MURCHISON GREENSTONE BELT (SOUTH AFRICA): A GENERAL TECTONIC FRAMEWORK. South African Journal of Geology 2012;; 115 (1): 65–76. doi: https://doi.org/10.2113/gssajg.115.1.65 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 SocietySouth African Journal of Geology Search Advanced Search Abstract This paper discusses the deformation pattern of the Murchison Greenstone Belt, which is located in the northeastern Kaapvaal Craton, South Africa. The belt strikes northeast to southwest, is surrounded by gneisses and granitoids, and contains Meso-Archaean metavolcanics and metasediments. It is narrow, strongly deformed, and deeply rooted in the centre with a bulk keel geometry. Regional fabrics consist of a sub-vertical foliation at a low angle to the belt strike and bears steeply plunging lineations. From available data and our observations, we constructed a map of the foliation trajectories. The map reveals the following: the deformations are distributed, both the belt and the northern bounding gneisses are deformed together in a ductile way, and the plutons were emplaced during regional deformation. The overall structural pattern, together with the existence of contemporaneous intrusive and extrusive rocks outcropping at the surface, supports a vertical tectonic model, with burial of the upper crustal rocks within the underlying weak material during horizontal crustal shortening. The occurrence of leucogranite intrusions is consistent with the melting of buried sediments belonging to the belt at depth. Finally, ages available on syn-kinematic granitoids (2.97 to 2.77 Ga) suggest a long-lasting tectonic process. 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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