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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ftdoajarticles:oai:doaj.org/article:bf2db5a78aea452fa994a839ae1dc353 2023-05-15T13:57:35+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 Monia Negusini Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra 2020-12-01T00:00:00Z https://doi.org/10.3390/rs13010087 https://doaj.org/article/bf2db5a78aea452fa994a839ae1dc353 EN eng MDPI AG https://www.mdpi.com/2072-4292/13/1/87 https://doaj.org/toc/2072-4292 doi:10.3390/rs13010087 2072-4292 https://doaj.org/article/bf2db5a78aea452fa994a839ae1dc353 Remote Sensing, Vol 13, Iss 87, p 87 (2020) VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics Science Q article 2020 ftdoajarticles https://doi.org/10.3390/rs13010087 2022-12-30T22:04:36Z 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 particular, 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 narrow 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 constrain/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 Geodynamic 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 proposed by some geological studies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean East Antarctica Ross Sea Victoria Land Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Remote Sensing 13 1 87 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics Science Q |
spellingShingle |
VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics Science Q Antonio Zanutta Monia Negusini 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 |
topic_facet |
VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics Science Q |
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 particular, 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 narrow 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 constrain/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 Geodynamic 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 proposed by some geological studies. |
format |
Article in Journal/Newspaper |
author |
Antonio Zanutta Monia Negusini Luca Vittuari Leonardo Martelli Paola Cianfarra Francesco Salvini Francesco Mancini Paolo Sterzai Nicola Creati Marco Dubbini Alessandro Capra |
author_facet |
Antonio Zanutta Monia Negusini 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 |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs13010087 https://doaj.org/article/bf2db5a78aea452fa994a839ae1dc353 |
long_lat |
ENVELOPE(161.500,161.500,-72.000,-72.000) |
geographic |
Antarctic Southern Ocean East Antarctica Ross Sea Victoria Land Rennick |
geographic_facet |
Antarctic Southern Ocean East Antarctica Ross Sea Victoria Land Rennick |
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_source |
Remote Sensing, Vol 13, Iss 87, p 87 (2020) |
op_relation |
https://www.mdpi.com/2072-4292/13/1/87 https://doaj.org/toc/2072-4292 doi:10.3390/rs13010087 2072-4292 https://doaj.org/article/bf2db5a78aea452fa994a839ae1dc353 |
op_doi |
https://doi.org/10.3390/rs13010087 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
1 |
container_start_page |
87 |
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1766265289687695360 |