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Contourite depositional system on the Argentine Slope: An exceptional record of the influence of Antarctic water masses

2009; Geological Society of America; Volume: 37; Issue: 6 Linguagem: Inglês

10.1130/g25578a.1

1943-2682

F. Javier Hernández‐Molina, Marcelo Paterlini, Roberto A. Violante, P. S. Marshall, M. de Isasi, Luı́s Somoza, Michele Rebesco,

Geological and Geochemical Analysis

Research Article| June 01, 2009 Contourite depositional system on the Argentine Slope: An exceptional record of the influence of Antarctic water masses F. Javier Hernández-Molina; F. Javier Hernández-Molina 1Facultad de Ciencias del Mar, Universidad de Vigo, 36200 Vigo, Spain Search for other works by this author on: GSW Google Scholar Marcelo Paterlini; Marcelo Paterlini 2Servicio de Hidrografía Naval, Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Search for other works by this author on: GSW Google Scholar Roberto Violante; Roberto Violante 2Servicio de Hidrografía Naval, Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Search for other works by this author on: GSW Google Scholar Patricio Marshall; Patricio Marshall 3Comisión Nacional del Límite Exterior de la Plataforma Continental (COPLA), Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Search for other works by this author on: GSW Google Scholar Martín de Isasi; Martín de Isasi 3Comisión Nacional del Límite Exterior de la Plataforma Continental (COPLA), Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Search for other works by this author on: GSW Google Scholar Luís Somoza; Luís Somoza 4Instituto Geológico y Minero de España, c/ Ríos Rosas, 23, 28003 Madrid, Spain Search for other works by this author on: GSW Google Scholar Michele Rebesco Michele Rebesco 5Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante 42/C, 34010 Sgonico, Italy Search for other works by this author on: GSW Google Scholar Author and Article Information F. Javier Hernández-Molina 1Facultad de Ciencias del Mar, Universidad de Vigo, 36200 Vigo, Spain Marcelo Paterlini 2Servicio de Hidrografía Naval, Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Roberto Violante 2Servicio de Hidrografía Naval, Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Patricio Marshall 3Comisión Nacional del Límite Exterior de la Plataforma Continental (COPLA), Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Martín de Isasi 3Comisión Nacional del Límite Exterior de la Plataforma Continental (COPLA), Montes de Oca 2124, Buenos Aires C1270ABV, Argentina Luís Somoza 4Instituto Geológico y Minero de España, c/ Ríos Rosas, 23, 28003 Madrid, Spain Michele Rebesco 5Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante 42/C, 34010 Sgonico, Italy Publisher: Geological Society of America Received: 06 Oct 2008 Revision Received: 08 Jan 2009 Accepted: 18 Jan 2009 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (6): 507–510. https://doi.org/10.1130/G25578A.1 Article history Received: 06 Oct 2008 Revision Received: 08 Jan 2009 Accepted: 18 Jan 2009 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation F. Javier Hernández-Molina, Marcelo Paterlini, Roberto Violante, Patricio Marshall, Martín de Isasi, Luís Somoza, Michele Rebesco; Contourite depositional system on the Argentine Slope: An exceptional record of the influence of Antarctic water masses. Geology 2009;; 37 (6): 507–510. doi: https://doi.org/10.1130/G25578A.1 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 A significant contourite depositional system (CDS) on the continental slope of the southern Argentine margin is described here for the first time. This system contains both erosive and depositional features that have resulted from several factors, including topographic intensification of the Antarctic-sourced water masses, the systematic northward decrease in speed of these water masses, a northward increase of downslope sedimentary processes, and local tectonic influences. This system is an exceptional example of a CDS that started to develop at the time of the Eocene-Oligocene boundary, potentially coeval with the opening of the Drake Passage. However, a new margin morphology, characterized by a complex terraced slope lacking any continental rise, developed after a major paleoceanographic change in the middle to late Miocene. We infer that this change resulted from the extension of North Atlantic Deep Water circulation into the Southern Hemisphere and the deepening of Antarctic Bottom Water circulation in the Argentine Basin. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.