DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

The role of sediments on subduction dynamics and geometry: insights from numerical modeling

Brizzi, S. and Becker, T. and Faccenna, C. and Behr, W. and van Zelst, Iris and Dal Zilio, L. and van Dinther, Ylona (2023) The role of sediments on subduction dynamics and geometry: insights from numerical modeling. EGU General Assembly 2023, 23-28 April 2023, Vienna, Austria. doi: 10.5194/egusphere-egu23-5221.

Full text not available from this repository.

Official URL: https://meetingorganizer.copernicus.org/EGU23/EGU23-5221.html


It is widely recognized that sediments play a key role for subduction. For example, sediments subducted along the shallow seismogenic plate interface are thought to influence seismic coupling and the occurrence of megathrust earthquakes, as well as the morphologies of accretionary prisms. Due to their weakening and/or lubricating effect, subducted sediments are also thought to promote faster plate speeds. However, global observations are not clear-cut on the relationship between the amount of sediments and plate motion. Here, we use 2D thermomecanical models to investigate how incoming plate sediments can influence subduction dynamics and geometry. We find that thick sediments can promote slower subduction due to an increase of the shear stress along the plate interface as the accretionary wedge gets wider, and a decrease of slab pull as more buoyant material is subducted. Our results also show that the larger interface shear stress and slab buoyancy due to thick sediments increase the slab bending radius. This study offers a new perspective on the role of sediments on large-scale subduction dynamics, suggesting that sediment buoyancy and wedge geometry might also affect plate motion and geometry.

Item URL in elib:https://elib.dlr.de/196969/
Document Type:Conference or Workshop Item (Speech)
Title:The role of sediments on subduction dynamics and geometry: insights from numerical modeling
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Brizzi, S.Roma Tre University, Rome, ItalyUNSPECIFIEDUNSPECIFIED
Becker, T.Department of Geological Sciences and Institute for Geophysics, Jackson School of GeosciencesUNSPECIFIEDUNSPECIFIED
Behr, W.Geological Institute and Institute of Geophysics, ETH ZürichUNSPECIFIEDUNSPECIFIED
van Zelst, IrisUNSPECIFIEDhttps://orcid.org/0000-0003-4698-9910UNSPECIFIED
Dal Zilio, L.Geological Institute and Institute of Geophysics, ETH ZürichUNSPECIFIEDUNSPECIFIED
van Dinther, YlonaDepartment of Earth Sciences, Utrecht UniversityUNSPECIFIEDUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:EGU23-5221
Keywords:subduction, numerical modelling, sediments
Event Title:EGU General Assembly 2023
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:23-28 April 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: van Zelst, Iris
Deposited On:04 Sep 2023 09:38
Last Modified:04 Sep 2023 09:38

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.