Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland
A model of three-dimensional shear wave velocity variations in the mantle reveals a tilted low velocity anomaly extending from the core-mantle boundary (CMB) region beneath the southeastern Atlantic Ocean into the upper mantle beneath eastern Africa. This anomaly suggests that Cenozoic flood basalt...
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American Association for the Advancement of Science (AAAS)
1999
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Online Access: | http://dx.doi.org/10.1126/science.286.5446.1925 https://www.science.org/doi/pdf/10.1126/science.286.5446.1925 |
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craaas:10.1126/science.286.5446.1925 2024-06-23T07:53:56+00:00 Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland Ritsema, Jeroen Heijst, Hendrik Jan van Woodhouse, John H. 1999 http://dx.doi.org/10.1126/science.286.5446.1925 https://www.science.org/doi/pdf/10.1126/science.286.5446.1925 en eng American Association for the Advancement of Science (AAAS) Science volume 286, issue 5446, page 1925-1928 ISSN 0036-8075 1095-9203 journal-article 1999 craaas https://doi.org/10.1126/science.286.5446.1925 2024-06-13T04:01:43Z A model of three-dimensional shear wave velocity variations in the mantle reveals a tilted low velocity anomaly extending from the core-mantle boundary (CMB) region beneath the southeastern Atlantic Ocean into the upper mantle beneath eastern Africa. This anomaly suggests that Cenozoic flood basalt volcanism in the Afar region and active rifting beneath the East African Rift is linked to an extensive thermal anomaly at the CMB more than 45 degrees away. In contrast, a low velocity anomaly beneath Iceland is confined to the upper mantle. Article in Journal/Newspaper Iceland AAAS Resource Center (American Association for the Advancement of Science) Science 286 5446 1925 1928 |
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Open Polar |
collection |
AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
A model of three-dimensional shear wave velocity variations in the mantle reveals a tilted low velocity anomaly extending from the core-mantle boundary (CMB) region beneath the southeastern Atlantic Ocean into the upper mantle beneath eastern Africa. This anomaly suggests that Cenozoic flood basalt volcanism in the Afar region and active rifting beneath the East African Rift is linked to an extensive thermal anomaly at the CMB more than 45 degrees away. In contrast, a low velocity anomaly beneath Iceland is confined to the upper mantle. |
format |
Article in Journal/Newspaper |
author |
Ritsema, Jeroen Heijst, Hendrik Jan van Woodhouse, John H. |
spellingShingle |
Ritsema, Jeroen Heijst, Hendrik Jan van Woodhouse, John H. Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
author_facet |
Ritsema, Jeroen Heijst, Hendrik Jan van Woodhouse, John H. |
author_sort |
Ritsema, Jeroen |
title |
Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
title_short |
Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
title_full |
Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
title_fullStr |
Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
title_full_unstemmed |
Complex Shear Wave Velocity Structure Imaged Beneath Africa and Iceland |
title_sort |
complex shear wave velocity structure imaged beneath africa and iceland |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1126/science.286.5446.1925 https://www.science.org/doi/pdf/10.1126/science.286.5446.1925 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Science volume 286, issue 5446, page 1925-1928 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.286.5446.1925 |
container_title |
Science |
container_volume |
286 |
container_issue |
5446 |
container_start_page |
1925 |
op_container_end_page |
1928 |
_version_ |
1802645823115231232 |