Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field
A high-resolution gravity field of poorly charted and ice-covered ocean near West Antarctica, from the Ross Sea east to the Weddell Sea, has been derived with the use of satellite altimetry, including ERS-1 geodetic phase, wave-form data. This gravity field reveals regional tectonic fabric, such as...
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American Association for the Advancement of Science (AAAS)
1997
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Online Access: | http://dx.doi.org/10.1126/science.276.5312.556 https://www.science.org/doi/pdf/10.1126/science.276.5312.556 |
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craaas:10.1126/science.276.5312.556 2024-09-15T17:39:06+00:00 Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field McAdoo, David Laxon, Seymour 1997 http://dx.doi.org/10.1126/science.276.5312.556 https://www.science.org/doi/pdf/10.1126/science.276.5312.556 en eng American Association for the Advancement of Science (AAAS) Science volume 276, issue 5312, page 556-561 ISSN 0036-8075 1095-9203 journal-article 1997 craaas https://doi.org/10.1126/science.276.5312.556 2024-08-01T04:01:08Z A high-resolution gravity field of poorly charted and ice-covered ocean near West Antarctica, from the Ross Sea east to the Weddell Sea, has been derived with the use of satellite altimetry, including ERS-1 geodetic phase, wave-form data. This gravity field reveals regional tectonic fabric, such as gravity lineations, which are the expression of fracture zones left by early (65 to 83 million years ago) Pacific-Antarctic sea-floor spreading that separated the Campbell Plateau and New Zealand continent from West Antarctica. These lineations constrain plate motion history and confirm the hypothesis that Antarctica behaved as two distinct plates, separated from each other by an extensional Bellingshausen plate boundary active in the Amundsen Sea before about 61 million years ago. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Weddell Sea West Antarctica AAAS Resource Center (American Association for the Advancement of Science) Science 276 5312 556 561 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
A high-resolution gravity field of poorly charted and ice-covered ocean near West Antarctica, from the Ross Sea east to the Weddell Sea, has been derived with the use of satellite altimetry, including ERS-1 geodetic phase, wave-form data. This gravity field reveals regional tectonic fabric, such as gravity lineations, which are the expression of fracture zones left by early (65 to 83 million years ago) Pacific-Antarctic sea-floor spreading that separated the Campbell Plateau and New Zealand continent from West Antarctica. These lineations constrain plate motion history and confirm the hypothesis that Antarctica behaved as two distinct plates, separated from each other by an extensional Bellingshausen plate boundary active in the Amundsen Sea before about 61 million years ago. |
format |
Article in Journal/Newspaper |
author |
McAdoo, David Laxon, Seymour |
spellingShingle |
McAdoo, David Laxon, Seymour Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
author_facet |
McAdoo, David Laxon, Seymour |
author_sort |
McAdoo, David |
title |
Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
title_short |
Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
title_full |
Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
title_fullStr |
Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
title_full_unstemmed |
Antarctic Tectonics: Constraints From an ERS-1 Satellite Marine Gravity Field |
title_sort |
antarctic tectonics: constraints from an ers-1 satellite marine gravity field |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1126/science.276.5312.556 https://www.science.org/doi/pdf/10.1126/science.276.5312.556 |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Weddell Sea West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ross Sea Weddell Sea West Antarctica |
op_source |
Science volume 276, issue 5312, page 556-561 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.276.5312.556 |
container_title |
Science |
container_volume |
276 |
container_issue |
5312 |
container_start_page |
556 |
op_container_end_page |
561 |
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1810477528076255232 |