Evidence for a serpentinized plate interface favouring continental subduction.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
01 May 2020
01 May 2020
Historique:
received:
28
07
2019
accepted:
01
04
2020
entrez:
3
5
2020
pubmed:
3
5
2020
medline:
3
5
2020
Statut:
epublish
Résumé
The dynamics of continental subduction is largely controlled by the rheological properties of rocks involved along the subduction channel. Serpentinites have low viscosity at geological strain rates. However, compelling geophysical evidence of a serpentinite channel during continental subduction is still lacking. Here we show that anomalously low shear-wave seismic velocities are found beneath the Western Alps, along the plate interface between the European slab and the overlying Adriatic mantle. We propose that these seismic velocities indicate the stacked remnants of a weak fossilised serpentinite channel, which includes both slivers of abyssal serpentinite formed at the ocean floor and mantle-wedge serpentinite formed by fluid release from the subducting slab. Our results suggest that this serpentinized plate interface may have favoured the subduction of continental crust into the upper mantle and the formation/exhumation of ultra-high pressure metamorphic rocks, providing new constraints to develop the conceptual and quantitative understanding of continental-subduction dynamics.
Identifiants
pubmed: 32358508
doi: 10.1038/s41467-020-15904-7
pii: 10.1038/s41467-020-15904-7
pmc: PMC7195360
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2171Subventions
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 41888101
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 91755000
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 41625016
Investigateurs
Liang Zhao
(L)
Marco G Malusà
(MG)
Anne Paul
(A)
Stéphane Guillot
(S)
Stefano Solarino
(S)
Elena Eva
(E)
Gang Lu
(G)
Anne Paul
(A)
Stefano Solarino
(S)
Commentaires et corrections
Type : ErratumIn
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