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- W2158605370 abstract "Research Article| December 01, 2011 GROWTH AND DISPERSAL OF A SOUTHEAST AFRICAN LARGE IGNEOUS PROVINCE K. GOHL; K. GOHL Alfred Wegener Institute for Polar and Marine Research, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany, e-mail: karsten.gohl@awi.de Search for other works by this author on: GSW Google Scholar G. UENZELMANN-NEBEN; G. UENZELMANN-NEBEN Alfred Wegener Institute for Polar and Marine Research, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany, e-mail: gabriele.uenzelmann-neben@awi.de Search for other works by this author on: GSW Google Scholar N. GROBYS N. GROBYS RWE Dea AG, Überseering 40, D-22297 Hamburg, Germany; formerly: Alfred Wegener Institute for Polar and Marine Research, Germany, e-mail: nicole.grobys@rwe.com Search for other works by this author on: GSW Google Scholar Author and Article Information K. GOHL Alfred Wegener Institute for Polar and Marine Research, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany, e-mail: karsten.gohl@awi.de G. UENZELMANN-NEBEN Alfred Wegener Institute for Polar and Marine Research, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany, e-mail: gabriele.uenzelmann-neben@awi.de N. GROBYS RWE Dea AG, Überseering 40, D-22297 Hamburg, Germany; formerly: Alfred Wegener Institute for Polar and Marine Research, Germany, e-mail: nicole.grobys@rwe.com Publisher: Geological Society of South Africa First Online: 09 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2011 Geological Society of South Africa South African Journal of Geology (2011) 114 (3-4): 379–386. https://doi.org/10.2113/gssajg.114.3-4.379 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation K. GOHL, G. UENZELMANN-NEBEN, N. GROBYS; GROWTH AND DISPERSAL OF A SOUTHEAST AFRICAN LARGE IGNEOUS PROVINCE. South African Journal of Geology 2011;; 114 (3-4): 379–386. doi: https://doi.org/10.2113/gssajg.114.3-4.379 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 The Mozambique Ridge (MOZR) and the Agulhas Plateau (AP) are prominent bathymetrically elevated rises off south-eastern Africa connected by a rise of less bathymetric expression. Intuitively, this observation would imply that the plateaus and rises underwent a related crustal formation. Deep crustal ocean-bottom seismometer data and a multichannel seismic reflection profile from the southern MOZR show evidence for its predominantly oceanic crustal origin with excessive volcanic eruption and magmatic accretion phases. The lower two-thirds of the crustal column exhibit P-wave velocities of more than 7.0 km/s, increasing to 7.5 to 7.6 km/s at the crustal base. These velocities suggest that the lower crust was accreted by large volumes of mantle-derived material to form an over-thickened equivalent of an oceanic layer 3. The velocity-depth model and the seismic reflection data of the MOZR resemble those of the AP, which suggests that a greater Southeast African Large Igneous Province (LIP) must have formed between 140 and 95 Ma in phases of highly varying magmatic and volcanic activities. The timing, size, and formation history of the Southeast African LIP is similar to those of the Kerguelen-Heard Plateau, which invites speculation about related processes of episodic magma generation at that time. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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