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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Online Access: | http://hdl.handle.net/2122/15365 https://doi.org/10.3390/rs13010087 |
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ftingv:oai:www.earth-prints.org:2122/15365 2023-05-15T14:01:37+02:00 Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model Zanutta, Antonio Negusini, Monia Vittuari, Luca Martelli, Leonardo Cianfarra, Paola Salvini, Francesco Mancini, Francesco Sterzai, Paolo Creati, Nicola Dubbini, Marco Capra, Alessandro #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia 2021 http://hdl.handle.net/2122/15365 https://doi.org/10.3390/rs13010087 en eng MDPI Remote Sensing /13 (2021) 2072-4292 http://hdl.handle.net/2122/15365 doi:10.3390/rs13010087 open article 2021 ftingv https://doi.org/10.3390/rs13010087 2022-07-29T06:08:43Z 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. Published 87 2T. Deformazione crostale attiva JCR Journal Article in Journal/Newspaper Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Antarctic East Antarctica Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Ross Sea Southern Ocean Victoria Land Remote Sensing 13 1 87 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
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 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. Published 87 2T. Deformazione crostale attiva JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia |
format |
Article in Journal/Newspaper |
author |
Zanutta, Antonio Negusini, Monia Vittuari, Luca Martelli, Leonardo Cianfarra, Paola Salvini, Francesco Mancini, Francesco Sterzai, Paolo Creati, Nicola Dubbini, Marco Capra, Alessandro |
spellingShingle |
Zanutta, Antonio Negusini, Monia Vittuari, Luca Martelli, Leonardo Cianfarra, Paola Salvini, Francesco Mancini, Francesco Sterzai, Paolo Creati, Nicola Dubbini, Marco Capra, Alessandro Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model |
author_facet |
Zanutta, Antonio Negusini, Monia Vittuari, Luca Martelli, Leonardo Cianfarra, Paola Salvini, Francesco Mancini, Francesco Sterzai, Paolo Creati, Nicola Dubbini, Marco Capra, Alessandro |
author_sort |
Zanutta, Antonio |
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 |
publishDate |
2021 |
url |
http://hdl.handle.net/2122/15365 https://doi.org/10.3390/rs13010087 |
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 /13 (2021) 2072-4292 http://hdl.handle.net/2122/15365 doi:10.3390/rs13010087 |
op_rights |
open |
op_doi |
https://doi.org/10.3390/rs13010087 |
container_title |
Remote Sensing |
container_volume |
13 |
container_issue |
1 |
container_start_page |
87 |
_version_ |
1766271582371577856 |