Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica
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 o...
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ftcsic:oai:digital.csic.es:10261/4963 2024-02-11T09:57:19+01:00 Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica Galindo Zaldívar, Jesús Suriñach, Emma Chávez, R. E. Maldonado, Andrés Flores-Márquez, E. Leticia 2007 680171 bytes application/pdf http://hdl.handle.net/10261/4963 en eng CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA) Geologica acta: an international earth science journal Vol. 5, Nº. 4, 2007 , pags. 323-336 1695-6133 http://hdl.handle.net/10261/4963 open Gravity Inverse theory Antarctic Peninsula Powell Basin Marine geophysics artículo http://purl.org/coar/resource_type/c_6501 2007 ftcsic 2024-01-16T09:19:41Z 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. Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Powell Basin ENVELOPE(-49.500,-49.500,-62.250,-62.250) South Scotia Ridge ENVELOPE(-46.500,-46.500,-60.000,-60.000) The Antarctic |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Gravity Inverse theory Antarctic Peninsula Powell Basin Marine geophysics |
spellingShingle |
Gravity Inverse theory Antarctic Peninsula Powell Basin Marine geophysics Galindo Zaldívar, Jesús Suriñach, Emma Chávez, R. E. Maldonado, Andrés Flores-Márquez, E. Leticia Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
topic_facet |
Gravity Inverse theory Antarctic Peninsula Powell Basin Marine geophysics |
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. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Galindo Zaldívar, Jesús Suriñach, Emma Chávez, R. E. Maldonado, Andrés Flores-Márquez, E. Leticia |
author_facet |
Galindo Zaldívar, Jesús Suriñach, Emma Chávez, R. E. Maldonado, Andrés Flores-Márquez, E. Leticia |
author_sort |
Galindo Zaldívar, Jesús |
title |
Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
title_short |
Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
title_full |
Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
title_fullStr |
Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
title_full_unstemmed |
Combined use of the GGSFT data base and on board marine collected data to model the Moho beneath the Powell Basin, Antarctica |
title_sort |
combined use of the ggsft data base and on board marine collected data to model the moho beneath the powell basin, antarctica |
publisher |
CSIC - Instituto de Ciencias de la Tierra Jaume Almera (ICTJA) |
publishDate |
2007 |
url |
http://hdl.handle.net/10261/4963 |
long_lat |
ENVELOPE(-49.500,-49.500,-62.250,-62.250) ENVELOPE(-46.500,-46.500,-60.000,-60.000) |
geographic |
Antarctic Antarctic Peninsula Powell Basin South Scotia Ridge The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Powell Basin South Scotia Ridge The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Geologica acta: an international earth science journal Vol. 5, Nº. 4, 2007 , pags. 323-336 1695-6133 http://hdl.handle.net/10261/4963 |
op_rights |
open |
_version_ |
1790609619077300224 |