Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin.
Swath bathymetry and seismic reflection profiles collected by the Italian Antarctic Program (PNRA WEGA and MOGAM projects), combined with Australian (CSIRO) oceanographic measures (Williams et al., 2010) and benthic fauna sampling (Post et al., 2010), in the offshore of the George Vth Land, document...
Published in: | Rendiconti Online della Società Geologica Italiana |
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FIST, Federazione Italiana di Scienze della Terra
2014
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Online Access: | http://hdl.handle.net/11368/2836277 https://doi.org/10.3301/ROL.2014.140 |
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ftunitriestiris:oai:arts.units.it:11368/2836277 2023-05-15T14:13:51+02:00 Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. CANDONI, OLIVIERO Tolotti, R. Macrì, P. Giorgetti, G. COLIZZA, ESTER FIST-Federazione Italiana Scienze della Terra De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. Colizza, Ester Candoni, Oliviero Tolotti, R. Macrì, P. Giorgetti, G. 2014 ELETTRONICO http://hdl.handle.net/11368/2836277 https://doi.org/10.3301/ROL.2014.140 eng eng FIST, Federazione Italiana di Scienze della Terra country:ITA ispartofbook:EPITOME 2014 - GEOITALIA 2014 - IX Forum Italiano della Terra The Future of the Italian Geosciences - The Italian Geosciences of the Future- 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia volume:31 firstpage:67 lastpage:67 numberofpages:1 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11368/2836277 doi:10.3301/ROL.2014.140 swath bathymetry seismic reflection Italian Antarctic Program info:eu-repo/semantics/conferenceObject 2014 ftunitriestiris https://doi.org/10.3301/ROL.2014.140 2023-04-09T06:12:33Z Swath bathymetry and seismic reflection profiles collected by the Italian Antarctic Program (PNRA WEGA and MOGAM projects), combined with Australian (CSIRO) oceanographic measures (Williams et al., 2010) and benthic fauna sampling (Post et al., 2010), in the offshore of the George Vth Land, document evidence of bottom water cascading currents and turbidity currents inside continental slope canyons. The continental slope is incised by canyons heading to shelf edge sills and bounding sedimentary ridges of Miocene age. Dense shelf water forms in coastal polynya and is exported off the shelf break to form the Adélie Land branch of the Antarctic Bottom Water (ALBW, Rintoul et al., 2008). This bottom water is detected by CTD and mooring measurements up to about 3200m of depth, in the Jussieu canyon and further to the west. The speed of the ALBW is enough to transport fine sand and silt from shallow to deep water as documented by sea bed sediments. Similar bottom currents activity is recorded also during Quaternary glacial and interglacials (Caburlotto et al., 2009, Macrì et al., 2005) with source in the George V Land rocks and in the continental shelf (Damiani et al., 2006). The meandering charater of the Jussieu canyon and the sediment wave field on its eastern ridge, would suggest that they likely formed under the action of downslope, continous, bottom current, since the early Pliocene (Escutia et al., 2010). Caburlotto A., Lucchi R.G., De Santis L., Macrì P., Tolotti R. 2010. Sedimentary processes on the Wilkes Land continental rise reflect changes in glacial dynamic and bottom water flow. International Journal of Earth Sciences, 99(4), 909-926. Damiani D., Giorgetti G., Memmi Turbanti I. 2006. Clay mineral fluctuations and surface textural analysis of quartz grains in Pliocene–Quaternary marine sediments from Wilkes Land continental rise (East-Antarctica): Paleoenvironmental significance. Marine Geology, 226,81-295. Escutia C., Brinkhuis H., Klaus A. & Expedition 318 Scientists 2011. Proc. Intergrated Ocean ... Conference Object Antarc* Antarctic Antarctica East Antarctica George V Land Wilkes Land Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Antarctic The Antarctic East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Klaus ENVELOPE(24.117,24.117,65.717,65.717) George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Wega ENVELOPE(144.000,144.000,-65.250,-65.250) Jussieu Canyon ENVELOPE(143.000,143.000,-65.250,-65.250) Rendiconti Online della Società Geologica Italiana 31 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
swath bathymetry seismic reflection Italian Antarctic Program |
spellingShingle |
swath bathymetry seismic reflection Italian Antarctic Program De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. CANDONI, OLIVIERO Tolotti, R. Macrì, P. Giorgetti, G. COLIZZA, ESTER Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
topic_facet |
swath bathymetry seismic reflection Italian Antarctic Program |
description |
Swath bathymetry and seismic reflection profiles collected by the Italian Antarctic Program (PNRA WEGA and MOGAM projects), combined with Australian (CSIRO) oceanographic measures (Williams et al., 2010) and benthic fauna sampling (Post et al., 2010), in the offshore of the George Vth Land, document evidence of bottom water cascading currents and turbidity currents inside continental slope canyons. The continental slope is incised by canyons heading to shelf edge sills and bounding sedimentary ridges of Miocene age. Dense shelf water forms in coastal polynya and is exported off the shelf break to form the Adélie Land branch of the Antarctic Bottom Water (ALBW, Rintoul et al., 2008). This bottom water is detected by CTD and mooring measurements up to about 3200m of depth, in the Jussieu canyon and further to the west. The speed of the ALBW is enough to transport fine sand and silt from shallow to deep water as documented by sea bed sediments. Similar bottom currents activity is recorded also during Quaternary glacial and interglacials (Caburlotto et al., 2009, Macrì et al., 2005) with source in the George V Land rocks and in the continental shelf (Damiani et al., 2006). The meandering charater of the Jussieu canyon and the sediment wave field on its eastern ridge, would suggest that they likely formed under the action of downslope, continous, bottom current, since the early Pliocene (Escutia et al., 2010). Caburlotto A., Lucchi R.G., De Santis L., Macrì P., Tolotti R. 2010. Sedimentary processes on the Wilkes Land continental rise reflect changes in glacial dynamic and bottom water flow. International Journal of Earth Sciences, 99(4), 909-926. Damiani D., Giorgetti G., Memmi Turbanti I. 2006. Clay mineral fluctuations and surface textural analysis of quartz grains in Pliocene–Quaternary marine sediments from Wilkes Land continental rise (East-Antarctica): Paleoenvironmental significance. Marine Geology, 226,81-295. Escutia C., Brinkhuis H., Klaus A. & Expedition 318 Scientists 2011. Proc. Intergrated Ocean ... |
author2 |
FIST-Federazione Italiana Scienze della Terra De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. Colizza, Ester Candoni, Oliviero Tolotti, R. Macrì, P. Giorgetti, G. |
format |
Conference Object |
author |
De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. CANDONI, OLIVIERO Tolotti, R. Macrì, P. Giorgetti, G. COLIZZA, ESTER |
author_facet |
De Santis, L Caburlotto, C. aburlotto A. Donda, F. Lucchi, R. G. Presti, M. Accettella, D. Geletti, R. Wardell, N. CANDONI, OLIVIERO Tolotti, R. Macrì, P. Giorgetti, G. COLIZZA, ESTER |
author_sort |
De Santis, L |
title |
Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
title_short |
Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
title_full |
Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
title_fullStr |
Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
title_full_unstemmed |
Antarctic Bottom Water flow pathway inferred from geomorphology and seismic stratigraphy of the George V Land margin. |
title_sort |
antarctic bottom water flow pathway inferred from geomorphology and seismic stratigraphy of the george v land margin. |
publisher |
FIST, Federazione Italiana di Scienze della Terra |
publishDate |
2014 |
url |
http://hdl.handle.net/11368/2836277 https://doi.org/10.3301/ROL.2014.140 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(24.117,24.117,65.717,65.717) ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(144.000,144.000,-65.250,-65.250) ENVELOPE(143.000,143.000,-65.250,-65.250) |
geographic |
Antarctic The Antarctic East Antarctica Wilkes Land Klaus George V Land Wega Jussieu Canyon |
geographic_facet |
Antarctic The Antarctic East Antarctica Wilkes Land Klaus George V Land Wega Jussieu Canyon |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land Wilkes Land |
op_relation |
ispartofbook:EPITOME 2014 - GEOITALIA 2014 - IX Forum Italiano della Terra The Future of the Italian Geosciences - The Italian Geosciences of the Future- 87° Congresso della Società Geologica Italiana e 90° Congresso della Società Italiana di Mineralogia e Petrologia volume:31 firstpage:67 lastpage:67 numberofpages:1 journal:RENDICONTI ONLINE DELLA SOCIETÀ GEOLOGICA ITALIANA http://hdl.handle.net/11368/2836277 doi:10.3301/ROL.2014.140 |
op_doi |
https://doi.org/10.3301/ROL.2014.140 |
container_title |
Rendiconti Online della Società Geologica Italiana |
container_volume |
31 |
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