Effects of mantle and subduction-interface rheologies on slab stagnation and trench rollback

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10173222" target="_blank" >RIV/00216208:11320/13:10173222 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.epsl.2013.08.011" target="_blank" >http://dx.doi.org/10.1016/j.epsl.2013.08.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.epsl.2013.08.011" target="_blank" >10.1016/j.epsl.2013.08.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of mantle and subduction-interface rheologies on slab stagnation and trench rollback

Popis výsledku v původním jazyce

Trench rollback has been a widely discussed phenomenon in recent years, and multiple studies have concentrated on various parameters that may influence trench migration and related aspects of slab deformation in the (upper) mantle. Here we concentrate onthe effects of rheological description (yield stress, lower-mantle viscosity, viscosity of crust) in controlling the rollback and associated stagnation of slabs in the transition zone (410-660 km depth). We perform numerical simulations of slab evolution in a 2D Cartesian model with strongly nonlinear rheology combining diffusion creep, dislocation creep and a power-law stress limiter. We demonstrate that trench retreat develops in most models considered, regardless of the subducting plate age or prescribed strength. Rollback then mostly produces slabs that are horizontally deflected at the 660-km phase boundary and remain subhorizontal at the bottom of the transition zone. Slab morphologies are in agreement with stagnant, horizontally

Název v anglickém jazyce

Effects of mantle and subduction-interface rheologies on slab stagnation and trench rollback

Popis výsledku anglicky

Trench rollback has been a widely discussed phenomenon in recent years, and multiple studies have concentrated on various parameters that may influence trench migration and related aspects of slab deformation in the (upper) mantle. Here we concentrate onthe effects of rheological description (yield stress, lower-mantle viscosity, viscosity of crust) in controlling the rollback and associated stagnation of slabs in the transition zone (410-660 km depth). We perform numerical simulations of slab evolution in a 2D Cartesian model with strongly nonlinear rheology combining diffusion creep, dislocation creep and a power-law stress limiter. We demonstrate that trench retreat develops in most models considered, regardless of the subducting plate age or prescribed strength. Rollback then mostly produces slabs that are horizontally deflected at the 660-km phase boundary and remain subhorizontal at the bottom of the transition zone. Slab morphologies are in agreement with stagnant, horizontally

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DE - Zemský magnetismus, geodesie, geografie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP210%2F11%2F1366" target="_blank" >GAP210/11/1366: Materiálové vlastnosti a dynamika spodního pláště Země</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Earth and Planetary Science Letters

ISSN

0012-821X

e-ISSN

—

Svazek periodika

379

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

95-103

Kód UT WoS článku

000327418800011

EID výsledku v databázi Scopus

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