Publication | Closed Access
Metamorphic Chronology of the Limpopo Belt, Southern Africa
80
Citations
0
References
1972
Year
EngineeringPrecambrian GeologySouthern AfricaEarth ScienceGsa Bulletin 1972Paleoenvironmental ReconstructionMetamorphic PetrologyGeochronologyMetamorphic ChronologyGeologyGsa BulletinMantle GeochemistryTectonicsStructural GeologyIsotope GeochemistryEconomic GeologyEarth SciencesGeochemistryPetrology
Research Article| July 01, 1972 Metamorphic Chronology of the Limpopo Belt, Southern Africa O VAN BREEMEN; O VAN BREEMEN Department of Earth Sciences, University of Leeds, Leeds, LS2 9JT, England PRESENT ADDRESS (VAN BREEMEN): ISOTOPE GEOLOGY UNIT, SCOTTISH RESEARCH REACTOR CENTRE, EAST KILBRIDE, GLASGOW, SCOTLAND Search for other works by this author on: GSW Google Scholar M. H DODSON M. H DODSON Department of Earth Sciences, University of Leeds, Leeds, LS2 9JT, England Search for other works by this author on: GSW Google Scholar Author and Article Information O VAN BREEMEN PRESENT ADDRESS (VAN BREEMEN): ISOTOPE GEOLOGY UNIT, SCOTTISH RESEARCH REACTOR CENTRE, EAST KILBRIDE, GLASGOW, SCOTLAND Department of Earth Sciences, University of Leeds, Leeds, LS2 9JT, England M. H DODSON Department of Earth Sciences, University of Leeds, Leeds, LS2 9JT, England Publisher: Geological Society of America Received: 27 Sep 1971 Revision Received: 10 Feb 1972 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1972, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1972) 83 (7): 2005–2018. https://doi.org/10.1130/0016-7606(1972)83[2005:MCOTLB]2.0.CO;2 Article history Received: 27 Sep 1971 Revision Received: 10 Feb 1972 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation O VAN BREEMEN, M. H DODSON; Metamorphic Chronology of the Limpopo Belt, Southern Africa. GSA Bulletin 1972;; 83 (7): 2005–2018. doi: https://doi.org/10.1130/0016-7606(1972)83[2005:MCOTLB]2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract The Limpopo Orogenic Belt is a linear zone of gneisses separating the adjacent granite-greenstone cratons of Rhodesia and the Transvaal. Previous age data suggested that the high-grade gneisses in the belt were formed 2,000 m.y. ago. In this Rb-Sr age study, three whole-rock isochrons and two mineral isochrons were obtained as well as 28 other isotope dilution analyses on minerals and whole rocks from scattered localities. A concordant isochron for the syngenetic Bulai and Singelele granites in the center of the belt yields an age of 2,690 ± 60 m.y. The age dates the formation of these rocks and, in addition to other evidence, indicates that the main folding and metamorphism dates back to 2,700 m.y. The average of 20 biotite and K-feldspar ages, however, confirms a strong thermal event at 2,000 ± 70 m.y. Equilibration of Sr isotopes at 2,000 m.y. in the Limpopo Belt can be related to intrusive and other contemporaneous events in southern Africa and may reflect the widespread “Eburnean” orogenic event in Africa. The formation of the Limpopo gneisses around 2,700 m.y. appears to be related to the widespread “Shamvaian” orogeny which strongly affected the Rhodesian and Transvaal cratons. 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.