Article (Scientific journals)
Microstructural evolution of silicate immiscible liquids in ferrobasalts
Honour, V. C.; Holness, M. B.; Partridge, J. L. et al.
2019In Contributions to Mineralogy and Petrology, 174 (9)
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Keywords :
Binodal; Droplet size distributions; Ferrobasalt; Immiscibility; Nucleation kinetics; Wetting angle
Abstract :
[en] An experimental study of the microstructural evolution of an immiscible basaltic emulsion shows that the Fe-rich liquid forms homogeneously nucleated droplets dispersed in a continuous Si-rich liquid, together with droplets heterogeneously nucleated on plagioclase, magnetite, and pyroxene. Heterogeneous nucleation is likely promoted by localised compositional heterogeneities around growing crystals. The wetting angle of Fe-rich droplets on both plagioclase and magnetite increases with decreasing temperature. Droplet coarsening occurs by a combination of diffusion-controlled growth and Ostwald ripening, with an insignificant contribution from coalescence. Characteristic microstructures resulting from the interaction of immiscible Fe-rich liquid with crystal grains during crystal growth can potentially be used as an indicator of liquid unmixing in fully crystallised natural samples. In magma bodies < ~ 10 m in size, gravitationally driven segregation of immiscible Fe-rich droplets is unlikely to be significant. © 2019, The Author(s).
Disciplines :
Earth sciences & physical geography
Author, co-author :
Honour, V. C.;  Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom
Holness, M. B.;  Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom
Partridge, J. L.;  Department of Applied Mathematics and Theoretical Physics, Cambridge, CB3 0WA, United Kingdom
Charlier, Bernard  ;  Université de Liège - ULiège > Département de géologie > Pétrologie, géochimie endogènes et pétrophysique
Language :
English
Title :
Microstructural evolution of silicate immiscible liquids in ferrobasalts
Publication date :
2019
Journal title :
Contributions to Mineralogy and Petrology
ISSN :
0010-7999
eISSN :
1432-0967
Publisher :
Springer Verlag
Volume :
174
Issue :
9
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Natural Environmental Research Council Doctoral Training Programme studentship project (Grant Ref: NE/L002507/1)
Funders :
NERC - Natural Environmental Research Council
Available on ORBi :
since 17 July 2020

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