Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data
Magnetic, gravity and bathymetric data from Marguerite Bay are used to study the relationships between oceanic and continental tectonic evolution in the arc and fore-arc of the Antarctic Peninsula. The data are used to redefine the crustal structure of the Marguerite Bay area, providing evidence for...
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Cambridge University Press
1997
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Online Access: | http://nora.nerc.ac.uk/id/eprint/514499/ https://doi.org/10.1017/S0954102097000369 |
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ftnerc:oai:nora.nerc.ac.uk:514499 2023-05-15T13:15:18+02:00 Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data Johnson, A.C. 1997-05 http://nora.nerc.ac.uk/id/eprint/514499/ https://doi.org/10.1017/S0954102097000369 unknown Cambridge University Press Johnson, A.C. 1997 Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data. Antarctic Science, 9 (3). 268-280. https://doi.org/10.1017/S0954102097000369 <https://doi.org/10.1017/S0954102097000369> Publication - Article PeerReviewed 1997 ftnerc https://doi.org/10.1017/S0954102097000369 2023-02-04T19:43:33Z Magnetic, gravity and bathymetric data from Marguerite Bay are used to study the relationships between oceanic and continental tectonic evolution in the arc and fore-arc of the Antarctic Peninsula. The data are used to redefine the crustal structure of the Marguerite Bay area, providing evidence for a northward continuation of George VI Sound and the Alexander Island Mesozoic accretionary prism almost to the continental shelf edge. A two-stage model of extension, associated with changes in spreading rates and approaching ridge segments, is proposed to explain the crustal structure and Cenozoic tectonic evolution of the area. The model involves the opening of George VI trough by Tertiary dextral transtension, followed by oblique extension in an area bounded by the Tula and Adelaide fracture zones. This interpretation confirms previous work linking oceanic tectonic processes with continental arc and fore-arc structural development. Article in Journal/Newspaper Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctic Science Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Marguerite ENVELOPE(141.378,141.378,-66.787,-66.787) Tula ENVELOPE(-65.650,-65.650,-65.517,-65.517) Marguerite Bay ENVELOPE(-68.000,-68.000,-68.500,-68.500) Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) George VI Sound ENVELOPE(-68.000,-68.000,-71.000,-71.000) Antarctic Science 9 3 268 280 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Magnetic, gravity and bathymetric data from Marguerite Bay are used to study the relationships between oceanic and continental tectonic evolution in the arc and fore-arc of the Antarctic Peninsula. The data are used to redefine the crustal structure of the Marguerite Bay area, providing evidence for a northward continuation of George VI Sound and the Alexander Island Mesozoic accretionary prism almost to the continental shelf edge. A two-stage model of extension, associated with changes in spreading rates and approaching ridge segments, is proposed to explain the crustal structure and Cenozoic tectonic evolution of the area. The model involves the opening of George VI trough by Tertiary dextral transtension, followed by oblique extension in an area bounded by the Tula and Adelaide fracture zones. This interpretation confirms previous work linking oceanic tectonic processes with continental arc and fore-arc structural development. |
format |
Article in Journal/Newspaper |
author |
Johnson, A.C. |
spellingShingle |
Johnson, A.C. Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
author_facet |
Johnson, A.C. |
author_sort |
Johnson, A.C. |
title |
Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
title_short |
Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
title_full |
Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
title_fullStr |
Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
title_full_unstemmed |
Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
title_sort |
cenozoic tectonic evolution of the marguerite bay area, antarctic peninsula, interpreted from geophysical data |
publisher |
Cambridge University Press |
publishDate |
1997 |
url |
http://nora.nerc.ac.uk/id/eprint/514499/ https://doi.org/10.1017/S0954102097000369 |
long_lat |
ENVELOPE(141.378,141.378,-66.787,-66.787) ENVELOPE(-65.650,-65.650,-65.517,-65.517) ENVELOPE(-68.000,-68.000,-68.500,-68.500) ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-68.000,-68.000,-71.000,-71.000) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Marguerite Tula Marguerite Bay Alexander Island George VI Sound |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Marguerite Tula Marguerite Bay Alexander Island George VI Sound |
genre |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctic Science |
genre_facet |
Alexander Island Antarc* Antarctic Antarctic Peninsula Antarctic Science |
op_relation |
Johnson, A.C. 1997 Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data. Antarctic Science, 9 (3). 268-280. https://doi.org/10.1017/S0954102097000369 <https://doi.org/10.1017/S0954102097000369> |
op_doi |
https://doi.org/10.1017/S0954102097000369 |
container_title |
Antarctic Science |
container_volume |
9 |
container_issue |
3 |
container_start_page |
268 |
op_container_end_page |
280 |
_version_ |
1766267940428054528 |