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 ge-ophysical and geodetic observations on a continental scale. It prevents the comprehensive under-standing...
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Online Access: | http://hdl.handle.net/11567/1068596 https://doi.org/10.3390/rs13010087 |
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ftunivgenova:oai:iris.unige.it:11567/1068596 2024-04-14T08:03:46+00:00 Victoria Land, Antarctica: An Improved Geodynamic Interpretation Based on the Strain Rate Field of the Current Crustal Motion and Moho Depth Model Zanutta Negusini Vittuari Martelli Cianfarra Paola Salvini Mancini Sterzai Creati Dubbini Capra Zanutta, Negusini Vittuari, Martelli Cianfarra, Paola Salvini, Mancini Sterzai, Creati Dubbini, Capra 2021 ELETTRONICO http://hdl.handle.net/11567/1068596 https://doi.org/10.3390/rs13010087 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000606064800001 volume:13 firstpage:1 lastpage:19 numberofpages:19 journal:REMOTE SENSING http://hdl.handle.net/11567/1068596 doi:10.3390/rs13010087 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85098625273 VLNDEF GNSS time series strain rate gravity anomaly Moho Antarctica geodynamics crustal deformations PNRA info:eu-repo/semantics/article 2021 ftunivgenova https://doi.org/10.3390/rs13010087 2024-03-21T02:37:55Z 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 ge-ophysical and geodetic observations on a continental scale. It prevents the comprehensive under-standing 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 DEFor-mation (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 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 pro-posed by some geological studies. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antartide East Antarctica Ice Sheet Ross Sea Southern Ocean Victoria Land Università degli Studi di Genova: CINECA IRIS 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 |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
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 Zanutta Negusini Vittuari Martelli Cianfarra Paola Salvini Mancini Sterzai Creati Dubbini 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 ge-ophysical and geodetic observations on a continental scale. It prevents the comprehensive under-standing 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 DEFor-mation (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 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 pro-posed by some geological studies. |
author2 |
Zanutta, Negusini Vittuari, Martelli Cianfarra, Paola Salvini, Mancini Sterzai, Creati Dubbini, Capra |
format |
Article in Journal/Newspaper |
author |
Zanutta Negusini Vittuari Martelli Cianfarra Paola Salvini Mancini Sterzai Creati Dubbini Capra |
author_facet |
Zanutta Negusini Vittuari Martelli Cianfarra Paola Salvini Mancini Sterzai Creati Dubbini Capra |
author_sort |
Zanutta Negusini |
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 |
http://hdl.handle.net/11567/1068596 https://doi.org/10.3390/rs13010087 |
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_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000606064800001 volume:13 firstpage:1 lastpage:19 numberofpages:19 journal:REMOTE SENSING http://hdl.handle.net/11567/1068596 doi:10.3390/rs13010087 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85098625273 |
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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1796300050069979136 |