The role of slabs and oceanic plate geometry in the net rotation of the lithosphere, trench motions, and slab return flow

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • M Gerault
  • TW Becker
  • BJP Kaus
  • C Faccenna
  • L Moresi
  • L Husson
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000302528800002&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1029/2011GC003934
eISSN
1525-2027
Externe Identifier
  • Clarivate Analytics Document Solution ID: 922EE
Zeitschrift
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Schlüsselwörter
  • lithosphere-mantle interactions
  • net rotation of the lithosphere
  • slab dynamics
  • trench motions
Artikelnummer
ARTN Q04001
Datum der Veröffentlichung
2012
Status
Published
Titel
The role of slabs and oceanic plate geometry in the net rotation of the lithosphere, trench motions, and slab return flow
Sub types
  • Article
Ausgabe der Zeitschrift
13

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>Absolute plate motion models with respect to a deep mantle reference frame (e.g., hot spots) typically contain some net rotation (NR) of the lithosphere. Global mantle flow models for the present‐day plate setting reproduce similarly oriented NRs but with amplitudes significantly smaller than those found in some high NR Pacific hot spot reference frames. It is therefore important to understand the mechanisms of NR excitation, which we attempt here with two‐dimensional cylindrical models of an idealized Pacific domain. We study the influence of slab properties, oceanic ridge position, continental keels, and a weak asthenospheric layer on NR and trench migration. Fast slab return flow develops in models with stiff slabs and moderate slab dips. Rapid NRs, comparable to the high NR Pacific hot spot reference frames, are primarily induced by asymmetric slab dips, in particular a shallow slab beneath South America and a steep slab in the western Pacific. A scaling relationship links the amplitude of NR to plate size, slab dip angle, and slab viscosity. Asymmetric ridge positions also promote NR through asymmetric plate sizes. Continental keels have less impact, in contrast to what has been found in earlier global studies. Several models yield unidirectional Pacific trench motions, such as slab advance in the western Pacific and, simultaneously, slab retreat in the eastern Pacific. Our model provides a physical explanation for NR generation in the present‐day Pacific setting and hints at mechanisms for the temporal evolution of the basin.</jats:p>
Autoren
  • M Gérault
  • TW Becker
  • BJP Kaus
  • C Faccenna
  • L Moresi
  • L Husson
DOI
10.1029/2011gc003934
eISSN
1525-2027
ISSN
1525-2027
Ausgabe der Veröffentlichung
4
Zeitschrift
Geochemistry, Geophysics, Geosystems
Sprache
en
Online publication date
2012
Datum der Veröffentlichung
2012
Status
Published
Herausgeber
American Geophysical Union (AGU)
Herausgeber URL
http://dx.doi.org/10.1029/2011gc003934
Datum der Datenerfassung
2023
Titel
The role of slabs and oceanic plate geometry in the net rotation of the lithosphere, trench motions, and slab return flow
Ausgabe der Zeitschrift
13

Datenquelle: Crossref

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