Influence of Variable Thermal Expansivity and Conductivity on Deep Subduction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000185" target="_blank" >RIV/00025798:_____/15:00000185 - isvavai.cz</a>
Result on the web
<a href="http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1118888855.html" target="_blank" >http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1118888855.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/9781118888865.ch0" target="_blank" >10.1002/9781118888865.ch0</a>
Alternative languages
Result language
angličtina
Original language name
Influence of Variable Thermal Expansivity and Conductivity on Deep Subduction
Original language description
Thickening of slabs subducted in the lower mantle is a robust feature from seismic tomography. Numerical models show clearly that, under suitable circumstances, deeply subducted plates experience buckling instabilities near the transition zone. These canlead to the formation of large-scale folds, which ultimately cause the lower mantle portion of slabs to be significantly thicker than the upper mantle part. Such models, however, generally rely on the assumption of constant thermodynamic properties. Here we present subduction simulations that include pressure-, temperature-, and phase-dependent thermal expansivity and conductivity, and demonstrate that these parameters exert a dramatic effect on the dynamics of lower mantle slabs. The decrease of expansivity with pressure causes slabs to lose buoyancy during their descent. This strongly enhances buckling and reduces sinking speed, thereby promoting thermal diffusion and a significant spreading of the slab thermal anomalies in the lower
Czech name
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Czech description
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Classification
Type
C - Chapter in a specialist book
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LK11202" target="_blank" >LK11202: The role of Paleozoic accretionary and collisanal orogens on the formation and growth of continental crust</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Book/collection name
Subduction Dynamics: From Mantle Flow to Mega Disasters
ISBN
9781118888858
Number of pages of the result
19
Pages from-to
115-133
Number of pages of the book
210
Publisher name
American Geophysical Union
Place of publication
Washington
UT code for WoS chapter
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