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Subduction history of the Caribbean from upper-mantle seismic imaging and plate reconstruction

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Title: Subduction history of the Caribbean from upper-mantle seismic imaging and plate reconstruction
Authors: Braszus, B
Goes, S
Allen, R
Rietbrock, A
Collier, J
Harmon, N
Henstock, T
Hicks, S
Rychert, CA
Maunder, B
Van Hunen, J
Bie, L
Blundy, J
Cooper, G
Davy, R
Kendall, JM
Macpherson, C
Wilkinson, J
Wilson, M
Item Type: Journal Article
Abstract: The margins of the Caribbean and associated hazards and resources have been shaped by a poorly understood history of subduction. Using new data, we improve teleseismic P-wave imaging of the eastern Caribbean upper mantle and compare identified subducted-plate fragments with trench locations predicted from plate reconstruction. This shows that material at 700–1200 km depth below South America derives from 90–115 Myr old westward subduction, initiated prior to Caribbean Large-Igneous-Province volcanism. At shallower depths, an accumulation of subducted material is attributed to Great Arc of the Caribbean subduction as it evolved over the past 70 Ma. We interpret gaps in these subducted-plate anomalies as: a plate window and tear along the subducted Proto-Caribbean ridge; tearing along subducted fracture zones, and subduction of a volatile-rich boundary between Proto-Caribbean and Atlantic domains. Phases of back-arc spreading and arc jumps correlate with changes in age, and hence buoyancy, of the subducting plate.
Issue Date: Dec-2021
Date of Acceptance: 21-May-2021
URI: http://hdl.handle.net/10044/1/90299
DOI: 10.1038/s41467-021-24413-0
ISSN: 2041-1723
Publisher: Nature Research
Start Page: 1
End Page: 14
Journal / Book Title: Nature Communications
Volume: 12
Issue: 1
Copyright Statement: © The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Publication Status: Published
Article Number: 4211
Online Publication Date: 2021-07-09
Appears in Collections:Earth Science and Engineering



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