The age of the Marble Hall diorite, its relationship to the Uitkomst Complex, and evidence for a new magma type associated with the Bushveld igneous event

Research Article| June 01, 2000 The age of the Marble Hall diorite, its relationship to the Uitkomst Complex, and evidence for a new magma type associated with the Bushveld igneous event S.A. de Waal; S.A. de Waal Department of Geology, University of Pretoria, Pretoria, 0002 Republic of South Africa, E-mail: sadw@scientia.up.ac.za Search for other works by this author on: GSW Google Scholar R.A. Armstrong R.A. Armstrong Research School of Earth Sciences, The Australian National University, Canberra, Act 0200, Australia, E-mail: prise.armstrong@anu.edu.au Search for other works by this author on: GSW Google Scholar Author and Article Information S.A. de Waal Department of Geology, University of Pretoria, Pretoria, 0002 Republic of South Africa, E-mail: sadw@scientia.up.ac.za R.A. Armstrong Research School of Earth Sciences, The Australian National University, Canberra, Act 0200, Australia, E-mail: prise.armstrong@anu.edu.au Publisher: Geological Society of South Africa Accepted: 30 Jun 2000 First Online: 07 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2000 Geological Society of South Africa South African Journal of Geology (2000) 103 (2): 128–140. https://doi.org/10.2113/103.2.128 Article history Accepted: 30 Jun 2000 First Online: 07 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation S.A. de Waal, R.A. Armstrong; The age of the Marble Hall diorite, its relationship to the Uitkomst Complex, and evidence for a new magma type associated with the Bushveld igneous event. South African Journal of Geology 2000;; 103 (2): 128–140. doi: https://doi.org/10.2113/103.2.128 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 Mesocratic to leucocratic diorite intruded as sills in the deformed Marble Hall Fragment in the vicinity of Marble Hall, Mpumalanga Province, South Africa. A mesocratic variety gives a 207Pb/206Pb SHRIMP age on zircon of 2055.6 ±3.1 Ma. This age similar to that of the Bushveld Complex and the conduit-like Uitkomst Complex. Because the more primitive variety of Marble Hall diorite is chemically comparable with the chill-zone rocks of the Basal Gabbro of the Uitkomst Complex, a new magma type (Bu-type magma), associated with the Bushveld igneous event, at c. 2056 Ma, is postulated. The emplacement of this magma preceded the emplacement of the Bushveld B 1-type magma, and may also be parental or genetically related to the Lindequesdrift intrusion (in Malmani dolomite), the Roodekraal Complex, and the Rietfontein Complex in the Potchefstroom area. These findings reinstate the economic potential of all these sub-Rusteriburg Layered Suite intrusives. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.