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Emergent, long-lived Gondwanaland vs. submergent, short-lived Laurasia: Supercontinental and Pan-African heat imparts long-term buoyancy by mafic underplating

1995; Geological Society of America; Volume: 23; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1995)023 2.3.co;2

1943-2682

J.J. Veevers,

Geological and Geochemical Analysis

Research Article| December 01, 1995 Emergent, long-lived Gondwanaland vs. submergent, short-lived Laurasia: Supercontinental and Pan-African heat imparts long-term buoyancy by mafic underplating J. J. Veevers J. J. Veevers 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, North Ryde, New South Wales 2109, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information J. J. Veevers 1Australian Plate Research Group, School of Earth Sciences, Macquarie University, North Ryde, New South Wales 2109, Australia Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1995) 23 (12): 1131–1134. https://doi.org/10.1130/0091-7613(1995)023 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 Email Permissions Search Site Citation J. J. Veevers; Emergent, long-lived Gondwanaland vs. submergent, short-lived Laurasia: Supercontinental and Pan-African heat imparts long-term buoyancy by mafic underplating. Geology 1995;; 23 (12): 1131–1134. doi: https://doi.org/10.1130/0091-7613(1995)023 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 Gondwanaland was buoyant, as indicated by nonmarine facies, and Laurasia was depressed, as indicated by marine facies. As a supercontinent, Gondwanaland lasted much longer than Laurasia and was hotter from internal heat. Moreover, the Pan-African orogenic cycle, confined to Gondwanaland, augmented the heat supply, which possibly generated a permanently buoyant lower crust by underplating. A crustal layer in the Australian Proterozoic shield with subhorizontal reflectors and velocity (Vp) >7.5 km/s is interpreted as mafic underplating beneath latest Neoproterozoic flood basalt. The Pan-African terrane in East Africa also contains evidence of mafic underplating, and most of Gondwanaland (but not Laurasia) was affected by terminal Pan-African (0.5 Ga) uplift and cooling. 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.