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

Braszus, B. 1; Goes, S.; Allen, R.; Rietbrock, A. 1; Collier, J.; Harmon, N.; Henstock, T.; Hicks, S.; Rychert, C. A.; Maunder, B.; Hunen, J. van; Bie, L. 1; Blundy, J.; Cooper, G.; Davy, R.; Kendall, J. M.; Macpherson, C.; Wilkinson, J.; Wilson, M.
1 Geophysikalisches Institut (GPI), Karlsruher Institut für Technologie (KIT)

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.


Verlagsausgabe §
DOI: 10.5445/IR/1000136094
Veröffentlicht am 07.08.2021
Originalveröffentlichung
DOI: 10.1038/s41467-021-24413-0
Scopus
Zitationen: 12
Web of Science
Zitationen: 11
Dimensions
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000136094
Erschienen in Nature Communications
Verlag Nature Research
Band 12
Heft 1
Seiten 4211
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Dimensions
Scopus
Web of Science
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