Imperial College London
Alternate

Saskia Goes

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Geophysics
 
 
 
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Contact

 

+44 (0)20 7594 6434s.goes

 
 
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Location

 

4.47Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Allen:2020:10.5194/egusphere-egu2020-9018,
author = {Allen, R and Braszus, B and Goes, S and Rietbrock, A and Collier, J},
doi = {10.5194/egusphere-egu2020-9018},
title = {Evolution of Caribbean subduction from P-wave tomography and plate reconstruction},
url = {http://dx.doi.org/10.5194/egusphere-egu2020-9018},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - <jats:p>        &lt;p&gt;The Caribbean plate has a complex tectonic history, which makes it&amp;#160; particularly challenging to establish the evolution of the subduction zones at its margins. Here we present a new teleseismic P-wave tomographic model under the Antillean arc that benefits from ocean-bottom seismometer data collected in our recent VoiLA (Volatile Recycling in the Lesser Antilles) project. We combine this imagery with a new plate reconstruction that we use to predict possible slab positions in the mantle today. We find that upper mantle anomalies below the eastern Caribbean correspond to a stack of material that was subducted at different trenches at different times, but ended up in a similar part of the mantle due to the large northwestward motion of the Americas. This stack comprises: in the mantle transition zone, slab fragments that were subducted between 70 and 55 Ma below the Cuban and Aves segments of the Greater Arc of the Caribbean; at 450-250 km depth, material subducted between 55 and 35 Ma below the older Lesser Antilles (including the Limestone Caribees and Virgin Islands);&amp;#160; and above 250 km, slab from subduction between 30 and 0 Ma below the present Lesser Antilles to Hispaniola Arc. Subdued high velocity anomalies in the slab above 200 km depth coincide with where the boundary between the equatorial Atlantic and proto-Caribbean subducted, rather than as previously proposed, with the North-South American plate boundary. The different phases of subduction can be linked to changes in the age, and hence buoyancy structure, of the subducting plate.&lt;/p&gt;        </jats:p>
AU  - Allen,R
AU  - Braszus,B
AU  - Goes,S
AU  - Rietbrock,A
AU  - Collier,J
DO  - 10.5194/egusphere-egu2020-9018
PY  - 2020///
TI  - Evolution of Caribbean subduction from P-wave tomography and plate reconstruction
UR  - http://dx.doi.org/10.5194/egusphere-egu2020-9018
ER  -
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