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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Published in:Antarctic Science
Main Author: Johnson, A.C.
Format: Article in Journal/Newspaper
Language:unknown
Published: Cambridge University Press 1997
Subjects:
Online Access:http://nora.nerc.ac.uk/id/eprint/514499/
https://doi.org/10.1017/S0954102097000369
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spelling 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
institution Open Polar
collection Natural Environment Research Council: NERC Open Research Archive
op_collection_id 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
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