Accretion and indentation tectonics at the southern edge of the Kaapvaal craton during the Kibaran (Grenville) orogeny

Research Article| March 01, 1993 Accretion and indentation tectonics at the southern edge of the Kaapvaal craton during the Kibaran (Grenville) orogeny J. Jacobs; J. Jacobs 1Institut für Geologie and Dynamik der Lithosphäre, Goldschmidtstrasse 3, 3400 Göttingen, Germany Search for other works by this author on: GSW Google Scholar R. J. Thomas; R. J. Thomas 2Geological Survey of South Africa, P.O. Box 900, Pietermaritzburg, 3200 South Africa Search for other works by this author on: GSW Google Scholar K. Weber K. Weber 1Institut für Geologie and Dynamik der Lithosphäre, Goldschmidtstrasse 3, 3400 Göttingen, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information J. Jacobs 1Institut für Geologie and Dynamik der Lithosphäre, Goldschmidtstrasse 3, 3400 Göttingen, Germany R. J. Thomas 2Geological Survey of South Africa, P.O. Box 900, Pietermaritzburg, 3200 South Africa K. Weber 1Institut für Geologie and Dynamik der Lithosphäre, Goldschmidtstrasse 3, 3400 Göttingen, Germany Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (3): 203–206. https://doi.org/10.1130/0091-7613(1993)021<0203:AAITAT>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 J. Jacobs, R. J. Thomas, K. Weber; Accretion and indentation tectonics at the southern edge of the Kaapvaal craton during the Kibaran (Grenville) orogeny. Geology 1993;; 21 (3): 203–206. doi: https://doi.org/10.1130/0091-7613(1993)021<0203:AAITAT>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 A comparison of the lithologic, geochronologic, and kinematic features of the ∼1Ga orogens in southern Africa (Namaqua-Natal belt) and the Heimefrontfjella (East Antarctica) shows that the three areas originally constituted a contiguous belt that evolved within a prolonged, consistently northeast-oriented stress regime (African azimuths). An early northeast- or southwest-directed thrusting event has been identified along the entire belt. A later episode of transcurrent shearing can account for both the emplacement of extensive late-tectonic granitoid plutons in Natal and for the development of the Koras and Sinclair basins in Namaqualand and Namibia. The geometry and sense of movement of the later shear zones are functions of the varying orientation of the adjacent Archean cratonic margin and a prolonged period of northeast-directed plate convergence. Consequently, the craton is interpreted as a southwest-directed indenter during the Grenville orogeny. 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.