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Combined use of the GGSFT data base and on Board Marine Collected Data to Model the Moho Beneath the Powell Basin, Antarctica

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dc.creator Chávez, R. E.
dc.creator Flores-Márquez, E. L.
dc.creator Suriñach Cornet, Emma
dc.creator Galindo Zaldívar, Jesús
dc.creator Rodríguez Fernández, José
dc.creator Maldonado, Andrés
dc.date 2011-03-08T09:35:08Z
dc.date 2011-03-08T09:35:08Z
dc.date 2007
dc.date.accessioned 2024-12-16T10:26:15Z
dc.date.available 2024-12-16T10:26:15Z
dc.identifier 1695-6133
dc.identifier http://hdl.handle.net/2445/16885
dc.identifier 549783
dc.identifier.uri http://fima-docencia.ub.edu:8080/xmlui/handle/123456789/20784
dc.description The Powell Basin is a small oceanic basin located at the NE end of the Antarctic Peninsula developed during the Early Miocene and mostly surrounded by the continental crusts of the South Orkney Microcontinent, South Scotia Ridge and Antarctic Peninsula margins. Gravity data from the SCAN 97 cruise obtained with the R/V Hespérides and data from the Global Gravity Grid and Sea Floor Topography (GGSFT) database (Sandwell and Smith, 1997) are used to determine the 3D geometry of the crustal-mantle interface (CMI) by numerical inversion methods. Water layer contribution and sedimentary effects were eliminated from the Free Air anomaly to obtain the total anomaly. Sedimentary effects were obtained from the analysis of existing and new SCAN 97 multichannel seismic profiles (MCS). The regional anomaly was obtained after spectral and filtering processes. The smooth 3D geometry of the crustal mantle interface obtained after inversion of the regional anomaly shows an increase in the thickness of the crust towards the continental margins and a NW-SE oriented axis of symmetry coinciding with the position of an older oceanic spreading axis. This interface shows a moderate uplift towards the western part and depicts two main uplifts to the northern and eastern sectors.
dc.format 13 p.
dc.format application/pdf
dc.language eng
dc.publisher Universitat de Barcelona (UB). Institut de Ciències de la Terra Jaume Almera (ICTJA). Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDEA). Universitat Autonònoma de Barcelona (UAB). Consejo Superior de Investigaciones Científicas (CSIC)
dc.relation Reproducció del document publicat a http://www.geologica-acta.com/pdf/vol0504a06.pdf
dc.relation Geologica Acta, 2007, vol. 5, núm. 4, p. 323-335
dc.rights cc by-sa (c) Chávez et al., 2007
dc.rights http://creativecommons.org/licenses/by-sa/3.0/es/
dc.rights info:eu-repo/semantics/openAccess
dc.source Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
dc.subject Antàrtida
dc.subject Geologia submarina
dc.subject Submarine geology
dc.subject Antarctica
dc.title Combined use of the GGSFT data base and on Board Marine Collected Data to Model the Moho Beneath the Powell Basin, Antarctica
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/publishedVersion


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