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 (CUP)
1997
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Online Access: | http://dx.doi.org/10.1017/s0954102097000369 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000369 |
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crcambridgeupr:10.1017/s0954102097000369 2024-03-03T08:36:28+00:00 Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data Johnson, A.C. 1997 http://dx.doi.org/10.1017/s0954102097000369 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000369 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 9, issue 3, page 268-280 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0954102097000369 2024-02-08T08:36:23Z 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 Cambridge University Press 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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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Johnson, A.C. Cenozoic tectonic evolution of the Marguerite Bay area, Antarctic Peninsula, interpreted from geophysical data |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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. |
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 (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0954102097000369 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/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_source |
Antarctic Science volume 9, issue 3, page 268-280 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102097000369 |
container_title |
Antarctic Science |
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9 |
container_issue |
3 |
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268 |
op_container_end_page |
280 |
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1792506952330248192 |