Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic
Multibeam bathymetry and magnetometer data from the Pitman fracture zone (FZ) permit construction of a plate motion history for the South Pacific over the past 65 million years. Reconstructions show that motion between the Antarctic and Bellingshausen plates was smaller than previously hypothesized...
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American Association for the Advancement of Science (AAAS)
1995
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Online Access: | http://dx.doi.org/10.1126/science.270.5238.947 https://www.science.org/doi/pdf/10.1126/science.270.5238.947 |
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craaas:10.1126/science.270.5238.947 2024-06-23T07:47:53+00:00 Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic Cande, Steven C. Raymond, Carol A. Stock, Joann Haxby, William F. 1995 http://dx.doi.org/10.1126/science.270.5238.947 https://www.science.org/doi/pdf/10.1126/science.270.5238.947 en eng American Association for the Advancement of Science (AAAS) Science volume 270, issue 5238, page 947-953 ISSN 0036-8075 1095-9203 journal-article 1995 craaas https://doi.org/10.1126/science.270.5238.947 2024-06-06T04:01:17Z Multibeam bathymetry and magnetometer data from the Pitman fracture zone (FZ) permit construction of a plate motion history for the South Pacific over the past 65 million years. Reconstructions show that motion between the Antarctic and Bellingshausen plates was smaller than previously hypothesized and ended earlier, at chron C27 (61 million years ago). The fixed hot-spot hypothesis and published paleomagnetic data require additional motion elsewhere during the early Tertiary, either between East Antarctica and West Antarctica or between the North and South Pacific. A plate reorganization at chron C27 initiated the Pitman FZ and may have been responsible for the other right-stepping fracture zones along the ridge. An abrupt (8°) clockwise rotation in the abyssal hill fabric along the Pitman flowline near the young end of chron C3a (5.9 million years ago) dates the major change in Pacific-Antarctic relative motion in the late Neogene. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica West Antarctica AAAS Resource Center (American Association for the Advancement of Science) Antarctic East Antarctica Pacific Pitman ENVELOPE(-67.583,-67.583,-70.167,-70.167) The Antarctic West Antarctica Science 270 5238 947 953 |
institution |
Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Multibeam bathymetry and magnetometer data from the Pitman fracture zone (FZ) permit construction of a plate motion history for the South Pacific over the past 65 million years. Reconstructions show that motion between the Antarctic and Bellingshausen plates was smaller than previously hypothesized and ended earlier, at chron C27 (61 million years ago). The fixed hot-spot hypothesis and published paleomagnetic data require additional motion elsewhere during the early Tertiary, either between East Antarctica and West Antarctica or between the North and South Pacific. A plate reorganization at chron C27 initiated the Pitman FZ and may have been responsible for the other right-stepping fracture zones along the ridge. An abrupt (8°) clockwise rotation in the abyssal hill fabric along the Pitman flowline near the young end of chron C3a (5.9 million years ago) dates the major change in Pacific-Antarctic relative motion in the late Neogene. |
format |
Article in Journal/Newspaper |
author |
Cande, Steven C. Raymond, Carol A. Stock, Joann Haxby, William F. |
spellingShingle |
Cande, Steven C. Raymond, Carol A. Stock, Joann Haxby, William F. Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
author_facet |
Cande, Steven C. Raymond, Carol A. Stock, Joann Haxby, William F. |
author_sort |
Cande, Steven C. |
title |
Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
title_short |
Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
title_full |
Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
title_fullStr |
Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
title_full_unstemmed |
Geophysics of the Pitman Fracture Zone and Pacific-Antarctic Plate Motions During the Cenozoic |
title_sort |
geophysics of the pitman fracture zone and pacific-antarctic plate motions during the cenozoic |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1126/science.270.5238.947 https://www.science.org/doi/pdf/10.1126/science.270.5238.947 |
long_lat |
ENVELOPE(-67.583,-67.583,-70.167,-70.167) |
geographic |
Antarctic East Antarctica Pacific Pitman The Antarctic West Antarctica |
geographic_facet |
Antarctic East Antarctica Pacific Pitman The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica West Antarctica |
op_source |
Science volume 270, issue 5238, page 947-953 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.270.5238.947 |
container_title |
Science |
container_volume |
270 |
container_issue |
5238 |
container_start_page |
947 |
op_container_end_page |
953 |
_version_ |
1802638127123136512 |