The present location of the Nubia-Somalia-Antarctica triple junction
I estimated 75 previously unavailable sea-floor spreading rates from shipboard and airplane magnetic profiles. To estimate the location of the Nubia-Somalia-Antarctica triple junction along the Southwest Indian Ridge (SWIR) I combined these, new rates with the 59 rates and 9 transform fault azimuths...
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ftriceuniv:oai:scholarship.rice.edu:1911/17412 2023-05-15T13:39:08+02:00 The present location of the Nubia-Somalia-Antarctica triple junction Cowles, Sara Marie Gordon, Richard G. 2001 179 p. application/pdf https://hdl.handle.net/1911/17412 eng eng Cowles, Sara Marie. "The present location of the Nubia-Somalia-Antarctica triple junction." (2001) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17412 . https://hdl.handle.net/1911/17412 THESIS GEOL. 2001 COWLES Physical geography Geophysics Thesis Text 2001 ftriceuniv 2022-08-09T20:47:31Z I estimated 75 previously unavailable sea-floor spreading rates from shipboard and airplane magnetic profiles. To estimate the location of the Nubia-Somalia-Antarctica triple junction along the Southwest Indian Ridge (SWIR) I combined these, new rates with the 59 rates and 9 transform fault azimuths used by Chu and Gordon (1999). F-ratio tests determined the statistical significance of a two-plate (Africa-Antarctica) model and various three-plate (Nubia-Somalia-Antarctica) models. The best fit Nubia-Antarctica angular velocity is a rotation of 0.1512 +/- 0.0015° Myr-1 (1sigma) about 12.596° N, 44.340° W. The best fit Somalia-Antarctica angular velocity is a rotation of 0.1378 +/- 0.0034° Myr-1 (1sigma) about 14.299° N, 55.064° W. If a narrow Nubia-Somalia boundary intersects the SWIR, the Nubia-Somalia-Antarctica triple junction lies along the SWIR between 36.28° E and 38.50° E (95% confidence limits). The best fit Nubia-Somalia angular velocity is a rotation of 0.0297 +/- 0.0085° Myr-1 (1sigma) about 2.068° S, 12.388° E. Thesis Antarc* Antarctica Rice University: Digital Scholarship Archive Indian |
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Open Polar |
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Rice University: Digital Scholarship Archive |
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ftriceuniv |
language |
English |
topic |
Physical geography Geophysics |
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Physical geography Geophysics Cowles, Sara Marie The present location of the Nubia-Somalia-Antarctica triple junction |
topic_facet |
Physical geography Geophysics |
description |
I estimated 75 previously unavailable sea-floor spreading rates from shipboard and airplane magnetic profiles. To estimate the location of the Nubia-Somalia-Antarctica triple junction along the Southwest Indian Ridge (SWIR) I combined these, new rates with the 59 rates and 9 transform fault azimuths used by Chu and Gordon (1999). F-ratio tests determined the statistical significance of a two-plate (Africa-Antarctica) model and various three-plate (Nubia-Somalia-Antarctica) models. The best fit Nubia-Antarctica angular velocity is a rotation of 0.1512 +/- 0.0015° Myr-1 (1sigma) about 12.596° N, 44.340° W. The best fit Somalia-Antarctica angular velocity is a rotation of 0.1378 +/- 0.0034° Myr-1 (1sigma) about 14.299° N, 55.064° W. If a narrow Nubia-Somalia boundary intersects the SWIR, the Nubia-Somalia-Antarctica triple junction lies along the SWIR between 36.28° E and 38.50° E (95% confidence limits). The best fit Nubia-Somalia angular velocity is a rotation of 0.0297 +/- 0.0085° Myr-1 (1sigma) about 2.068° S, 12.388° E. |
author2 |
Gordon, Richard G. |
format |
Thesis |
author |
Cowles, Sara Marie |
author_facet |
Cowles, Sara Marie |
author_sort |
Cowles, Sara Marie |
title |
The present location of the Nubia-Somalia-Antarctica triple junction |
title_short |
The present location of the Nubia-Somalia-Antarctica triple junction |
title_full |
The present location of the Nubia-Somalia-Antarctica triple junction |
title_fullStr |
The present location of the Nubia-Somalia-Antarctica triple junction |
title_full_unstemmed |
The present location of the Nubia-Somalia-Antarctica triple junction |
title_sort |
present location of the nubia-somalia-antarctica triple junction |
publishDate |
2001 |
url |
https://hdl.handle.net/1911/17412 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Cowles, Sara Marie. "The present location of the Nubia-Somalia-Antarctica triple junction." (2001) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17412 . https://hdl.handle.net/1911/17412 THESIS GEOL. 2001 COWLES |
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1766114890197499904 |