Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis
The dense fault network that separates the tectonic units of northern Victoria Land to the E from the East Antarctic Craton to the W represents a regionally sized, NNW-SSE trending deformation zone that is also known as the Rennick Graben Fault system (RGF). This long-lived deformation zone is chara...
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Online Access: | https://hdl.handle.net/11590/427033 https://doi.org/10.1029/2021TC007124 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021TC007124 |
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ftunivroma3iris:oai:iris.uniroma3.it:11590/427033 2024-02-27T08:33:17+00:00 Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L 2022 https://hdl.handle.net/11590/427033 https://doi.org/10.1029/2021TC007124 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021TC007124 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000817175000001 volume:41 issue:6 numberofpages:25 journal:TECTONICS https://hdl.handle.net/11590/427033 doi:10.1029/2021TC007124 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021TC007124 north Victoria land Antarctica fractures intensity H S multiple paleostre structural inheritance Meso-Cenozoic tectonic Rennick Graben info:eu-repo/semantics/article 2022 ftunivroma3iris https://doi.org/10.1029/2021TC007124 2024-01-31T17:33:47Z The dense fault network that separates the tectonic units of northern Victoria Land to the E from the East Antarctic Craton to the W represents a regionally sized, NNW-SSE trending deformation zone that is also known as the Rennick Graben Fault system (RGF). This long-lived deformation zone is characterized by great structural complexity, with the superposition and polyphasic reactivation of regional faults; it is known to have been active since the Cambrian-Ordovician, when it formed as a suture zone between different terranes, up to the recent. Its complete framework and geodynamic evolution are still debated and have only been partially investigated. In this research, we explore the Meso-Cenozoic tectonic framework of the RGF by investigating the paleostress fields that characterized the last geodynamic events in the area and their associated brittle deformation. We analyzed faults and fractures data collected at 89 sites during several PNRA ItaliAntartide expeditions and combined fault-slip data inversion with the azimuthal orientation of faults and the spatial distribution of fracture intensities across the RGF. The results from this multi methodological approach confirm the existence of two geotectonic provinces (Bowers Mountains province to the E and Usarp Mountains to the W) characterized by different spatial distributions of brittle deformation, which are significantly more intense in the Bower Mountains domain. Here, the repeated reactivation of the RGF led to the superposition of two recent (Meso-Cenozoic) major tectonic events, with prevalent strike-slip kinematics and characterized by fault reactivation with right-lateral movement overprinting the previous left-lateral event. Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Antarctic Victoria Land Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Bower ENVELOPE(160.500,160.500,-72.617,-72.617) Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Bowers Mountains ENVELOPE(163.250,163.250,-71.167,-71.167) Usarp Mountains ENVELOPE(160.000,160.000,-71.167,-71.167) Tectonics 41 6 |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
topic |
north Victoria land Antarctica fractures intensity H S multiple paleostre structural inheritance Meso-Cenozoic tectonic Rennick Graben |
spellingShingle |
north Victoria land Antarctica fractures intensity H S multiple paleostre structural inheritance Meso-Cenozoic tectonic Rennick Graben Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
topic_facet |
north Victoria land Antarctica fractures intensity H S multiple paleostre structural inheritance Meso-Cenozoic tectonic Rennick Graben |
description |
The dense fault network that separates the tectonic units of northern Victoria Land to the E from the East Antarctic Craton to the W represents a regionally sized, NNW-SSE trending deformation zone that is also known as the Rennick Graben Fault system (RGF). This long-lived deformation zone is characterized by great structural complexity, with the superposition and polyphasic reactivation of regional faults; it is known to have been active since the Cambrian-Ordovician, when it formed as a suture zone between different terranes, up to the recent. Its complete framework and geodynamic evolution are still debated and have only been partially investigated. In this research, we explore the Meso-Cenozoic tectonic framework of the RGF by investigating the paleostress fields that characterized the last geodynamic events in the area and their associated brittle deformation. We analyzed faults and fractures data collected at 89 sites during several PNRA ItaliAntartide expeditions and combined fault-slip data inversion with the azimuthal orientation of faults and the spatial distribution of fracture intensities across the RGF. The results from this multi methodological approach confirm the existence of two geotectonic provinces (Bowers Mountains province to the E and Usarp Mountains to the W) characterized by different spatial distributions of brittle deformation, which are significantly more intense in the Bower Mountains domain. Here, the repeated reactivation of the RGF led to the superposition of two recent (Meso-Cenozoic) major tectonic events, with prevalent strike-slip kinematics and characterized by fault reactivation with right-lateral movement overprinting the previous left-lateral event. |
author2 |
Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L |
format |
Article in Journal/Newspaper |
author |
Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L |
author_facet |
Cianfarra, P Locatelli, M Capponi, G Crispini, L Rossi, C Salvini, F Federico, L |
author_sort |
Cianfarra, P |
title |
Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
title_short |
Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
title_full |
Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
title_fullStr |
Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
title_full_unstemmed |
Multiple Reactivations of the Rennick Graben Fault System (Northern Victoria Land, Antarctica): New Evidence From Paleostress Analysis |
title_sort |
multiple reactivations of the rennick graben fault system (northern victoria land, antarctica): new evidence from paleostress analysis |
publishDate |
2022 |
url |
https://hdl.handle.net/11590/427033 https://doi.org/10.1029/2021TC007124 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021TC007124 |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) ENVELOPE(160.500,160.500,-72.617,-72.617) ENVELOPE(161.500,161.500,-72.000,-72.000) ENVELOPE(163.250,163.250,-71.167,-71.167) ENVELOPE(160.000,160.000,-71.167,-71.167) |
geographic |
Antarctic Victoria Land Bowers Bower Rennick Bowers Mountains Usarp Mountains |
geographic_facet |
Antarctic Victoria Land Bowers Bower Rennick Bowers Mountains Usarp Mountains |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000817175000001 volume:41 issue:6 numberofpages:25 journal:TECTONICS https://hdl.handle.net/11590/427033 doi:10.1029/2021TC007124 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021TC007124 |
op_doi |
https://doi.org/10.1029/2021TC007124 |
container_title |
Tectonics |
container_volume |
41 |
container_issue |
6 |
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1792044935836336128 |