Fick's law adapted to cationic diffusion in a semi-infinite solid: application to spinel megacrystals
Details
Serval ID
serval:BIB_7CB24BF8373B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fick's law adapted to cationic diffusion in a semi-infinite solid: application to spinel megacrystals
Journal
Annales de Chimie - Sciences des Matériaux
ISSN-L
0151-9107
Publication state
Published
Issued date
1999
Peer-reviewed
Oui
Volume
24
Pages
117-124
Language
english
Notes
ISI:000078573700003
Abstract
In alkaline lavas, the chemical zoning of megacrystals of spinel is due
to the cationic exchange between the latter and the host lava. The
application of Fick's law to cationic diffusion profiles allows to
calculate the time these crystals have stayed in the lava. Those which
are in a chemical equilibrium were in contact with the lava during 20 to
30 days, whereas megacrystals lacking this equilibrium were in contact
only for 3 or 4 days. The duration of the rise of an ultrabasic nodule
in the volcanic chimney was calculated by applying Stokes' law.
to the cationic exchange between the latter and the host lava. The
application of Fick's law to cationic diffusion profiles allows to
calculate the time these crystals have stayed in the lava. Those which
are in a chemical equilibrium were in contact with the lava during 20 to
30 days, whereas megacrystals lacking this equilibrium were in contact
only for 3 or 4 days. The duration of the rise of an ultrabasic nodule
in the volcanic chimney was calculated by applying Stokes' law.
Create date
11/12/2012 15:25
Last modification date
20/08/2019 14:38
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