Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model
In Antarctica, the severe climatic conditions and the thick ice sheet that covers the largest and most internal part of the continent make it particularly difficult to systematically carry out geophysical and geodetic observations on a continental scale. It prevents the comprehensive understanding o...
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ftinstnastrofisi:oai:openaccess.inaf.it:20.500.12386/32055 2023-05-15T13:54:48+02:00 Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model Antonio Zanutta NEGUSINI, MONIA Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra ITA 2021 https://hdl.handle.net/20.500.12386/32055 https://doi.org/10.3390/rs13010087 https://www.mdpi.com/2072-4292/13/1/87 en eng REMOTE SENSING 2072-4292 http://hdl.handle.net/20.500.12386/32055 doi:10.3390/rs13010087 2-s2.0-85098625273 https://www.mdpi.com/2072-4292/13/1/87 open Article 2021 ftinstnastrofisi https://doi.org/20.500.12386/32055 https://doi.org/10.3390/rs13010087 2022-07-06T16:01:03Z In Antarctica, the severe climatic conditions and the thick ice sheet that covers the largest and most internal part of the continent make it particularly difficult to systematically carry out geophysical and geodetic observations on a continental scale. It prevents the comprehensive understanding of both the onshore and offshore geology as well as the relationship between the inner part of East Antarctica (EA) and the coastal sector of Victoria Land (VL). With the aim to reduce this gap, in this paper multiple geophysical dataset collected since the 1980s in Antarctica by Programma Nazionale di Ricerche in Antartide (PNRA) were integrated with geodetic observations. In particu-lar, the analyzed data includes: (i) Geodetic time series from Trans Antarctic Mountains DEFormation (TAMDEF), and Victoria Land Network for DEFormation control (VLNDEF) GNSS stations installed in Victoria Land; (ii) the integration of on-shore (ground points data and airborne) gravity measurements in Victoria Land and marine gravity surveys performed in the Ross Sea and the nar-row strip of Southern Ocean facing the coasts of northern Victoria Land. Gravity data modelling has improved the knowledge of the Moho depth of VL and surrounding the offshore areas. By the integration of geodetic and gravitational (or gravity) potential results it was possible to better con-strain/identify four geodynamic blocks characterized by homogeneous geophysical signature: the Southern Ocean to the N, the Ross Sea to the E, the Wilkes Basin to the W, and VL in between. The last block is characterized by a small but significant clockwise rotation relative to East Antarctica. The presence of a N-S to NNW-SSE 1-km step in the Moho in correspondence of the Rennick Geo-dynamic Belt confirms the existence of this crustal scale discontinuity, possibly representing the tectonic boundary between East Antarctica and the northern part of VL block, as previously pro-posed by some geological studies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land OA@INAF (Istituto Nazionale di Astrofisica) Antarctic East Antarctica Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Ross Sea Southern Ocean Victoria Land |
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Open Polar |
collection |
OA@INAF (Istituto Nazionale di Astrofisica) |
op_collection_id |
ftinstnastrofisi |
language |
English |
description |
In Antarctica, the severe climatic conditions and the thick ice sheet that covers the largest and most internal part of the continent make it particularly difficult to systematically carry out geophysical and geodetic observations on a continental scale. It prevents the comprehensive understanding of both the onshore and offshore geology as well as the relationship between the inner part of East Antarctica (EA) and the coastal sector of Victoria Land (VL). With the aim to reduce this gap, in this paper multiple geophysical dataset collected since the 1980s in Antarctica by Programma Nazionale di Ricerche in Antartide (PNRA) were integrated with geodetic observations. In particu-lar, the analyzed data includes: (i) Geodetic time series from Trans Antarctic Mountains DEFormation (TAMDEF), and Victoria Land Network for DEFormation control (VLNDEF) GNSS stations installed in Victoria Land; (ii) the integration of on-shore (ground points data and airborne) gravity measurements in Victoria Land and marine gravity surveys performed in the Ross Sea and the nar-row strip of Southern Ocean facing the coasts of northern Victoria Land. Gravity data modelling has improved the knowledge of the Moho depth of VL and surrounding the offshore areas. By the integration of geodetic and gravitational (or gravity) potential results it was possible to better con-strain/identify four geodynamic blocks characterized by homogeneous geophysical signature: the Southern Ocean to the N, the Ross Sea to the E, the Wilkes Basin to the W, and VL in between. The last block is characterized by a small but significant clockwise rotation relative to East Antarctica. The presence of a N-S to NNW-SSE 1-km step in the Moho in correspondence of the Rennick Geo-dynamic Belt confirms the existence of this crustal scale discontinuity, possibly representing the tectonic boundary between East Antarctica and the northern part of VL block, as previously pro-posed by some geological studies. |
author2 |
ITA |
format |
Article in Journal/Newspaper |
author |
Antonio Zanutta NEGUSINI, MONIA Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra |
spellingShingle |
Antonio Zanutta NEGUSINI, MONIA Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
author_facet |
Antonio Zanutta NEGUSINI, MONIA Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra |
author_sort |
Antonio Zanutta |
title |
Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
title_short |
Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
title_full |
Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
title_fullStr |
Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
title_full_unstemmed |
Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
title_sort |
victoria land, antarctica: an improved geodynamic interpretation based on the strain rate field of the current crustal motion and moho depth model |
publishDate |
2021 |
url |
https://hdl.handle.net/20.500.12386/32055 https://doi.org/10.3390/rs13010087 https://www.mdpi.com/2072-4292/13/1/87 |
long_lat |
ENVELOPE(161.500,161.500,-72.000,-72.000) |
geographic |
Antarctic East Antarctica Rennick Ross Sea Southern Ocean Victoria Land |
geographic_facet |
Antarctic East Antarctica Rennick Ross Sea Southern Ocean Victoria Land |
genre |
Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land |
op_relation |
REMOTE SENSING 2072-4292 http://hdl.handle.net/20.500.12386/32055 doi:10.3390/rs13010087 2-s2.0-85098625273 https://www.mdpi.com/2072-4292/13/1/87 |
op_rights |
open |
op_doi |
https://doi.org/20.500.12386/32055 https://doi.org/10.3390/rs13010087 |
_version_ |
1766260929489534976 |