New seismic data from the Ronne Ice Shelf, Antarctica
We present the first images of sub-seabed structure to be obtained from beneath the Ronne Ice Shelf. Single-fold profiles totalling 158 km were recorded using a new form drag cable with explosives as source. The survey was conducted in an area lying 100 km SE of the Orville Coast, Antarctic Peninsul...
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Geological Society of London
1996
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Online Access: | http://nora.nerc.ac.uk/id/eprint/515168/ https://doi.org/10.1144/GSL.SP.1996.108.01.16 |
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ftnerc:oai:nora.nerc.ac.uk:515168 2023-05-15T13:49:33+02:00 New seismic data from the Ronne Ice Shelf, Antarctica King, E. C. Bell, A. C. Storey, B.C. King, E.C. Livermore, R.A. 1996 http://nora.nerc.ac.uk/id/eprint/515168/ https://doi.org/10.1144/GSL.SP.1996.108.01.16 unknown Geological Society of London King, E. C. orcid:0000-0003-3793-3915 Bell, A. C. 1996 New seismic data from the Ronne Ice Shelf, Antarctica. In: Storey, B.C.; King, E.C. orcid:0000-0003-3793-3915 Livermore, R.A., (eds.) Weddell Sea tectonics and Gondwana break-up. London, Geological Society of London, 213-226. (Geological Society special publication, 108, 108). Publication - Book Section NonPeerReviewed 1996 ftnerc https://doi.org/10.1144/GSL.SP.1996.108.01.16 2023-02-04T19:43:55Z We present the first images of sub-seabed structure to be obtained from beneath the Ronne Ice Shelf. Single-fold profiles totalling 158 km were recorded using a new form drag cable with explosives as source. The survey was conducted in an area lying 100 km SE of the Orville Coast, Antarctic Peninsula. The ice shelf at this location is about 350 m thick and the seabed undulates gently between 650 and 675 m below sealevel. In the western part of the area, acoustic basement outcrops at the seabed. In the eastern part, a set of open folds were observed with wavelengths of 5–6 km, amplitudes of 200–300 m and a NNE-SSW strike direction. These features match those observed on previous marine data obtained in the narrow shore lead at the front of the ice shelf and allow the strike of the structures to be traced for 70 km to the SW of the original observations. Existing models of the plate tectonic development of West Antarctica have anticipated major dextral strike-slip motion between the Antarctic Peninsula and the Weddell Sea but the new data shows no evidence for this, indeed the structures can be interpreted as resulting from an episode of sinistral motion. Book Part Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ronne Ice Shelf Weddell Sea West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Weddell Sea West Antarctica Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Orville ENVELOPE(-63.000,-63.000,-75.167,-75.167) Orville Coast ENVELOPE(-65.500,-65.500,-75.750,-75.750) Geological Society, London, Special Publications 108 1 213 226 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
We present the first images of sub-seabed structure to be obtained from beneath the Ronne Ice Shelf. Single-fold profiles totalling 158 km were recorded using a new form drag cable with explosives as source. The survey was conducted in an area lying 100 km SE of the Orville Coast, Antarctic Peninsula. The ice shelf at this location is about 350 m thick and the seabed undulates gently between 650 and 675 m below sealevel. In the western part of the area, acoustic basement outcrops at the seabed. In the eastern part, a set of open folds were observed with wavelengths of 5–6 km, amplitudes of 200–300 m and a NNE-SSW strike direction. These features match those observed on previous marine data obtained in the narrow shore lead at the front of the ice shelf and allow the strike of the structures to be traced for 70 km to the SW of the original observations. Existing models of the plate tectonic development of West Antarctica have anticipated major dextral strike-slip motion between the Antarctic Peninsula and the Weddell Sea but the new data shows no evidence for this, indeed the structures can be interpreted as resulting from an episode of sinistral motion. |
author2 |
Storey, B.C. King, E.C. Livermore, R.A. |
format |
Book Part |
author |
King, E. C. Bell, A. C. |
spellingShingle |
King, E. C. Bell, A. C. New seismic data from the Ronne Ice Shelf, Antarctica |
author_facet |
King, E. C. Bell, A. C. |
author_sort |
King, E. C. |
title |
New seismic data from the Ronne Ice Shelf, Antarctica |
title_short |
New seismic data from the Ronne Ice Shelf, Antarctica |
title_full |
New seismic data from the Ronne Ice Shelf, Antarctica |
title_fullStr |
New seismic data from the Ronne Ice Shelf, Antarctica |
title_full_unstemmed |
New seismic data from the Ronne Ice Shelf, Antarctica |
title_sort |
new seismic data from the ronne ice shelf, antarctica |
publisher |
Geological Society of London |
publishDate |
1996 |
url |
http://nora.nerc.ac.uk/id/eprint/515168/ https://doi.org/10.1144/GSL.SP.1996.108.01.16 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-63.000,-63.000,-75.167,-75.167) ENVELOPE(-65.500,-65.500,-75.750,-75.750) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea West Antarctica Weddell Ronne Ice Shelf Orville Orville Coast |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea West Antarctica Weddell Ronne Ice Shelf Orville Orville Coast |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ronne Ice Shelf Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Shelf Ronne Ice Shelf Weddell Sea West Antarctica |
op_relation |
King, E. C. orcid:0000-0003-3793-3915 Bell, A. C. 1996 New seismic data from the Ronne Ice Shelf, Antarctica. In: Storey, B.C.; King, E.C. orcid:0000-0003-3793-3915 Livermore, R.A., (eds.) Weddell Sea tectonics and Gondwana break-up. London, Geological Society of London, 213-226. (Geological Society special publication, 108, 108). |
op_doi |
https://doi.org/10.1144/GSL.SP.1996.108.01.16 |
container_title |
Geological Society, London, Special Publications |
container_volume |
108 |
container_issue |
1 |
container_start_page |
213 |
op_container_end_page |
226 |
_version_ |
1766251589868191744 |