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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ftmdpi:oai:mdpi.com:/2072-4292/13/1/87/ 2023-08-20T04:02:26+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 agris 2020-12-29 application/pdf https://doi.org/10.3390/rs13010087 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13010087 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 13; Issue 1; Pages: 87 VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics crustal deformations PNRA Text 2020 ftmdpi https://doi.org/10.3390/rs13010087 2023-08-01T00:45:12Z 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. Text Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land MDPI Open Access Publishing 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 |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics crustal deformations PNRA |
spellingShingle |
VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics crustal deformations PNRA 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 crustal deformations PNRA |
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 |
Text |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs13010087 |
op_coverage |
agris |
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; Volume 13; Issue 1; Pages: 87 |
op_relation |
Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs13010087 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs13010087 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
1 |
container_start_page |
87 |
_version_ |
1774712880556408832 |