Using calculated chemical potential relationships to account for replacement of kyanite by symplectite in high pressure granulites

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000058" target="_blank" >RIV/00025798:_____/15:00000058 - isvavai.cz</a>
Result on the web
<a href="http://onlinelibrary.wiley.com/doi/10.1111/jmg.12122/abstract" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/jmg.12122/abstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/jmg.12122" target="_blank" >10.1111/jmg.12122</a>

Result language
angličtina
Original language name
Using calculated chemical potential relationships to account for replacement of kyanite by symplectite in high pressure granulites
Original language description
Calculated mineral equilibria are used to account for the formation of sapphirine?plagioclase, spinel?plagioclase and corundum?plagioclase symplectites replacing kyanite in quartz?plagioclase?garnet?kyanite granulite facies gneisses from the Athabasca granulite terrane, the Snowbird tectonic zone, Canada.Metamorphic conditions of ;14 kbar and 800 °C are established for the high pressure, garnet?kyanite assemblage using constraints from P?T pseudosections and Zr-in-rutile thermometry. Replacement of kyanite by symplectites reflects the reaction of kyanite with the matrix following near-isothermal decompression to ;10 kbar. The chemical potential gradients developed between the kyanite and the matrix led to diffusion that attempted to flatten the gradients, kyanite persisting as a stable phase while it is consumed by symplectite from its edge. In this local equilibrium model, the mineral and mineral compositional spatial relationships are shown to correspond to paths in mu(Na2O)?mu(CaO)?
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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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)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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