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...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1999
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| _version_ | 1797086122328719360 |
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| author | Ritsema, J van Heijst, H Woodhouse, J |
| author_facet | Ritsema, J van Heijst, H Woodhouse, J |
| author_sort | Ritsema, J |
| collection | OXFORD |
| 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. |
| first_indexed | 2024-03-07T02:17:33Z |
| format | Journal article |
| id | oxford-uuid:a2c7cdc3-4a6e-4702-a385-94ceaf5e25b6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:17:33Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | oxford-uuid:a2c7cdc3-4a6e-4702-a385-94ceaf5e25b62022-03-27T02:22:19ZComplex shear wave velocity structure imaged beneath Africa and IcelandJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a2c7cdc3-4a6e-4702-a385-94ceaf5e25b6EnglishSymplectic Elements at Oxford1999Ritsema, Jvan Heijst, HWoodhouse, JA 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. |
| spellingShingle | Ritsema, J van Heijst, H Woodhouse, J Complex shear wave velocity structure imaged beneath Africa and Iceland |
| title | 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_short | Complex shear wave velocity structure imaged beneath Africa and Iceland |
| title_sort | complex shear wave velocity structure imaged beneath africa and iceland |
| work_keys_str_mv | AT ritsemaj complexshearwavevelocitystructureimagedbeneathafricaandiceland AT vanheijsth complexshearwavevelocitystructureimagedbeneathafricaandiceland AT woodhousej complexshearwavevelocitystructureimagedbeneathafricaandiceland |