Anisotropic seismic structure of the northern East African Rift system and Red Sea from surface waves
Anisotropic seismic structure of the northern East African Rift system and Red Sea from surface waves
Continental rifting is a fundamental process of plate tectonics that has been shaping our planet for billions of years. The northern East African Rift system, including the Gulf of Aden and the Red Sea, presents an excellent opportunity to study this process in locations sub-aerially prior to continental break-up, through to full seafloor spreading. We present results from anisotropic surface wave imaging of the region’s crust and uppermost mantle. Anisotropic structures provide additional information about the form of structures at depth and deformation in the region. We find low seismic velocities within the Main Ethiopian Rift (MER), the Red Sea and Gulf of Aden that likely represent melt emplaced in the crust and uppermost mantle. Radial anisotropy, defined as a difference in wave speed of vertically versus horizontally polarized seismic waves, is observed across the region but is strongest within the rift. The strength of radial anisotropy in the MER suggests that horizontally layered melt intrusions are
146-161
Chambers, Emma L.
a437ec20-d7f5-408c-bf74-1e07acf4f967
Harmon, Nicholas
10d11a16-b8b0-4132-9354-652e72d8e830
Rychert, Catherine A.
70cf1e3a-58ea-455a-918a-1d570c5e53c5
Keir, Derek
5616f81f-bf1b-4678-a167-3160b5647c65
8 May 2024
Chambers, Emma L.
a437ec20-d7f5-408c-bf74-1e07acf4f967
Harmon, Nicholas
10d11a16-b8b0-4132-9354-652e72d8e830
Rychert, Catherine A.
70cf1e3a-58ea-455a-918a-1d570c5e53c5
Keir, Derek
5616f81f-bf1b-4678-a167-3160b5647c65
Chambers, Emma L., Harmon, Nicholas, Rychert, Catherine A. and Keir, Derek
(2024)
Anisotropic seismic structure of the northern East African Rift system and Red Sea from surface waves.
In,
Rasul, Najeeb M.A. and Stewart, Ian C.F.
(eds.)
Rifting and Sediments in the Red Sea and Arabian Gulf Regions.
1 ed.
CRC Press, .
(doi:10.1201/9781003321415).
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Abstract
Continental rifting is a fundamental process of plate tectonics that has been shaping our planet for billions of years. The northern East African Rift system, including the Gulf of Aden and the Red Sea, presents an excellent opportunity to study this process in locations sub-aerially prior to continental break-up, through to full seafloor spreading. We present results from anisotropic surface wave imaging of the region’s crust and uppermost mantle. Anisotropic structures provide additional information about the form of structures at depth and deformation in the region. We find low seismic velocities within the Main Ethiopian Rift (MER), the Red Sea and Gulf of Aden that likely represent melt emplaced in the crust and uppermost mantle. Radial anisotropy, defined as a difference in wave speed of vertically versus horizontally polarized seismic waves, is observed across the region but is strongest within the rift. The strength of radial anisotropy in the MER suggests that horizontally layered melt intrusions are
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Published date: 8 May 2024
Identifiers
Local EPrints ID: 495373
URI: http://eprints.soton.ac.uk/id/eprint/495373
PURE UUID: c15f7dff-0307-4c0b-a481-f2cefbb5d01b
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Date deposited: 12 Nov 2024 17:33
Last modified: 13 Nov 2024 02:44
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Author:
Emma L. Chambers
Editor:
Najeeb M.A. Rasul
Editor:
Ian C.F. Stewart
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