The effect of variable thermal diffusivity on kinematic models of subduction

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10123808" target="_blank" >RIV/00216208:11320/12:10123808 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/" target="_blank" >http://dx.doi.org/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2011JB009119" target="_blank" >10.1029/2011JB009119</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of variable thermal diffusivity on kinematic models of subduction

Popis výsledku v původním jazyce

We examine the influence of variable thermal properties on the thermal state of a subducting slab in the upper mantle and the transition zone by combining a kinematic slab model with models of thermal conductivity. Thermal diffusivity and conductivity models for major mantle minerals in the MgO-SiO2 system are developed based on experimental measurements on these minerals at high pressure and temperature. The models show significantly higher thermal conductivity for stishovite and clinopyroxene comparedto the Mg2SiO4 polymorphs and majorite garnet. In our subduction model we consider scenarios with a differentiated slab (basalt-harzburgite-pyrolite) in a pyrolite mantle and uniform composition for both the slab and the mantle (pyrolite or a pure Mg2SiO4-based system). The role of highly conductive pyroxene is examined by taking it into account in some models and replacing it in others with majorite garnet. This choice has a strong influence on the thermal state of the slab, shifting t

Název v anglickém jazyce

The effect of variable thermal diffusivity on kinematic models of subduction

Popis výsledku anglicky

We examine the influence of variable thermal properties on the thermal state of a subducting slab in the upper mantle and the transition zone by combining a kinematic slab model with models of thermal conductivity. Thermal diffusivity and conductivity models for major mantle minerals in the MgO-SiO2 system are developed based on experimental measurements on these minerals at high pressure and temperature. The models show significantly higher thermal conductivity for stishovite and clinopyroxene comparedto the Mg2SiO4 polymorphs and majorite garnet. In our subduction model we consider scenarios with a differentiated slab (basalt-harzburgite-pyrolite) in a pyrolite mantle and uniform composition for both the slab and the mantle (pyrolite or a pure Mg2SiO4-based system). The role of highly conductive pyroxene is examined by taking it into account in some models and replacing it in others with majorite garnet. This choice has a strong influence on the thermal state of the slab, shifting t

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH

ISSN

0148-0227

e-ISSN

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Svazek periodika

117

Číslo periodika v rámci svazku

JULY

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

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Kód UT WoS článku

000306464400002

EID výsledku v databázi Scopus

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