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U-Pb zircon age for the Umkondo dolerites, eastern Zimbabwe: 1.1 Ga large igneous province in southern Africa–East Antarctica and possible Rodinia correlations

1998; Geological Society of America; Volume: 26; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1998)026 2.3.co;2

1943-2682

Richard E. Hanson, Mark W. Martin, Samuel A. Bowring, Hubert Munyanyiwa,

Geochemistry and Geologic Mapping

Research Article| December 01, 1998 U-Pb zircon age for the Umkondo dolerites, eastern Zimbabwe: 1.1 Ga large igneous province in southern Africa–East Antarctica and possible Rodinia correlations Richard E. Hanson; Richard E. Hanson 1Department of Geology, Texas Christian University, Fort Worth, Texas 76129 Search for other works by this author on: GSW Google Scholar Mark W. Martin; Mark W. Martin 2Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Search for other works by this author on: GSW Google Scholar Samuel A. Bowring; Samuel A. Bowring 2Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Search for other works by this author on: GSW Google Scholar Hubert Munyanyiwa Hubert Munyanyiwa 3Department of Geology, University of Zimbabwe, P.O. Box MP 167, Harare, Zimbabwe Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (12): 1143–1146. https://doi.org/10.1130/0091-7613(1998)026 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 Richard E. Hanson, Mark W. Martin, Samuel A. Bowring, Hubert Munyanyiwa; U-Pb zircon age for the Umkondo dolerites, eastern Zimbabwe: 1.1 Ga large igneous province in southern Africa–East Antarctica and possible Rodinia correlations. Geology 1998;; 26 (12): 1143–1146. doi: https://doi.org/10.1130/0091-7613(1998)026 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 We report a U-Pb zircon age of 1105 ± 2 Ma for the extensive Umkondo dolerites in eastern Zimbabwe, which are part of a large igneous province that can be traced over much of southern Africa and originally contiguous parts of East Antarctica. Other members of the province include widespread tholeiitic intrusions in Botswana and South Africa, bimodal volcanic rocks in Botswana and Namibia, and dolerites and flood basalts in Dronning Maud Land, Antarctica. Available data indicate that substantial parts of the province were emplaced in a restricted interval at ca. 1.1 Ga and originated from a large-scale mantle thermal anomaly inboard of a coeval continental-margin orogen. Striking similarities in age and tectonic setting between the Umkondo igneous province and widespread 1.1 Ga within-plate magmatism in Laurentia are consistent with reconstructions of the early Neoproterozoic Rodinia supercontinent that place southern Africa and Dronning Maud Land off the southern tip of Laurentia. 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.