Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica)
We present the interpretation of 11 radio echo-sounding (RES) missions carried out over the Vostok–Dome Concordia region during the Italian Antarctic expeditions in the period 1995– 2001. The extension and the density of the radar data in the surveyed area allowed to reconstruct a reliable subglacia...
Published in: | Geophysical Journal International |
---|---|
Main Authors: | , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2006
|
Subjects: | |
Online Access: | https://hdl.handle.net/11567/988433 https://doi.org/10.1111/j.1365-246X.2006.02954.x |
id |
ftunivgenova:oai:iris.unige.it:11567/988433 |
---|---|
record_format |
openpolar |
spelling |
ftunivgenova:oai:iris.unige.it:11567/988433 2024-04-14T08:02:35+00:00 Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) TABACCO . I. E CIANFARRA, Paola FORIERI A SALVINI F. ZIRIZOTTI A. Tabacco, . I. E. Cianfarra, Paola Forieri, A Salvini, F. ZIRIZOTTI A. 2006 ELETTRONICO https://hdl.handle.net/11567/988433 https://doi.org/10.1111/j.1365-246X.2006.02954.x eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000238649000024 volume:165 (3) firstpage:1029 lastpage:1040 numberofpages:12 journal:GEOPHYSICAL JOURNAL INTERNATIONAL https://hdl.handle.net/11567/988433 doi:10.1111/j.1365-246X.2006.02954.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33745943632 info:eu-repo/semantics/article 2006 ftunivgenova https://doi.org/10.1111/j.1365-246X.2006.02954.x 2024-03-21T02:31:55Z We present the interpretation of 11 radio echo-sounding (RES) missions carried out over the Vostok–Dome Concordia region during the Italian Antarctic expeditions in the period 1995– 2001. The extension and the density of the radar data in the surveyed area allowed to reconstruct a reliable subglacial morphology and to identify four relevant morphological structures namely: the Aurora trench, the Concordia trench, the Concordia ridge and the South Hills. These structures show evidence compatible with the presence of tectonic features. Morphological considerations indicate their development in Cenozoic time. Hybrid cellular automata (HCA)- based numerical modelling allowed to justify a possible role played by the tectonics of the Aurora and Concordia trench evolution. This was accomplished by matching the bed profiles along opportunely projected sections with the modelled surfaces as derived by the activity of normal faults with variable surfaces within the continental crust. The Vostok–Dome C region is characterized by a large number of subglacial lakes. From the analysis of basal reflected power echo, we identified 14 new lakes and obtained information about their physiography as well as their possible relations with tectonics.We propose a grouping of subglacial lakes on the base of their physiography and geological setting, namely relief lakes, basin lakes and trench lakes. Relief lakes located in the Belgica subglacial highlands and are characterized by sharp and steep symmetric edges, suggesting a maximum water depth of the order of 100 m. Their origin may well relate to localized, positive geothermal flux anomalies. Basin lakes located in the Vincennes subglacial basin and are characterized by wider dimension that allow the development of well-defined, flat ice surface anomalies. Trench lakes characterize the Aurora and Concordia trenches as the possible effect of normal fault activity. Article in Journal/Newspaper Antarc* Antarctic Antarctica Università degli Studi di Genova: CINECA IRIS Antarctic New Lakes ENVELOPE(177.649,177.649,51.951,51.951) Belgica Subglacial Highlands ENVELOPE(129.000,129.000,-76.500,-76.500) Vincennes Subglacial Basin ENVELOPE(122.000,122.000,-73.000,-73.000) Geophysical Journal International 165 3 1029 1040 |
institution |
Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
description |
We present the interpretation of 11 radio echo-sounding (RES) missions carried out over the Vostok–Dome Concordia region during the Italian Antarctic expeditions in the period 1995– 2001. The extension and the density of the radar data in the surveyed area allowed to reconstruct a reliable subglacial morphology and to identify four relevant morphological structures namely: the Aurora trench, the Concordia trench, the Concordia ridge and the South Hills. These structures show evidence compatible with the presence of tectonic features. Morphological considerations indicate their development in Cenozoic time. Hybrid cellular automata (HCA)- based numerical modelling allowed to justify a possible role played by the tectonics of the Aurora and Concordia trench evolution. This was accomplished by matching the bed profiles along opportunely projected sections with the modelled surfaces as derived by the activity of normal faults with variable surfaces within the continental crust. The Vostok–Dome C region is characterized by a large number of subglacial lakes. From the analysis of basal reflected power echo, we identified 14 new lakes and obtained information about their physiography as well as their possible relations with tectonics.We propose a grouping of subglacial lakes on the base of their physiography and geological setting, namely relief lakes, basin lakes and trench lakes. Relief lakes located in the Belgica subglacial highlands and are characterized by sharp and steep symmetric edges, suggesting a maximum water depth of the order of 100 m. Their origin may well relate to localized, positive geothermal flux anomalies. Basin lakes located in the Vincennes subglacial basin and are characterized by wider dimension that allow the development of well-defined, flat ice surface anomalies. Trench lakes characterize the Aurora and Concordia trenches as the possible effect of normal fault activity. |
author2 |
Tabacco, . I. E. Cianfarra, Paola Forieri, A Salvini, F. ZIRIZOTTI A. |
format |
Article in Journal/Newspaper |
author |
TABACCO . I. E CIANFARRA, Paola FORIERI A SALVINI F. ZIRIZOTTI A. |
spellingShingle |
TABACCO . I. E CIANFARRA, Paola FORIERI A SALVINI F. ZIRIZOTTI A. Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
author_facet |
TABACCO . I. E CIANFARRA, Paola FORIERI A SALVINI F. ZIRIZOTTI A. |
author_sort |
TABACCO . I. E |
title |
Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
title_short |
Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
title_full |
Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
title_fullStr |
Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
title_full_unstemmed |
Physiography and tectonic setting of the subglacial lake district between Vostok and Belgica Subglacial Highlands (Antarctica) |
title_sort |
physiography and tectonic setting of the subglacial lake district between vostok and belgica subglacial highlands (antarctica) |
publishDate |
2006 |
url |
https://hdl.handle.net/11567/988433 https://doi.org/10.1111/j.1365-246X.2006.02954.x |
long_lat |
ENVELOPE(177.649,177.649,51.951,51.951) ENVELOPE(129.000,129.000,-76.500,-76.500) ENVELOPE(122.000,122.000,-73.000,-73.000) |
geographic |
Antarctic New Lakes Belgica Subglacial Highlands Vincennes Subglacial Basin |
geographic_facet |
Antarctic New Lakes Belgica Subglacial Highlands Vincennes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000238649000024 volume:165 (3) firstpage:1029 lastpage:1040 numberofpages:12 journal:GEOPHYSICAL JOURNAL INTERNATIONAL https://hdl.handle.net/11567/988433 doi:10.1111/j.1365-246X.2006.02954.x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33745943632 |
op_doi |
https://doi.org/10.1111/j.1365-246X.2006.02954.x |
container_title |
Geophysical Journal International |
container_volume |
165 |
container_issue |
3 |
container_start_page |
1029 |
op_container_end_page |
1040 |
_version_ |
1796315995748433920 |