In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts

In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts

Bubble growth strongly affects the physical properties of degassing magmas and their eruption dynamics. Natural samples and products from quench experiments provide only a snapshot of the final state of volatile exsolution, leaving the processes occurring during its early stages unconstrained. In or...

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Veröffentlicht in:Contributions to mineralogy and petrology 2014-02, Vol.167 (2), p.1, Article 976
Hauptverfasser: Masotta, M., Ni, H., Keppler, H.
Format: Artikel
Sprache:eng
Schlagworte:
Basalt
Bubbles
Coalescence
Crystallization
Crystals
Degassing
Earth and Environmental Science
Earth Sciences
Gases
Geology
High temperature
Magma
Mineral Resources
Mineralogy
Nucleation
Original Paper
Petrology
Physical properties
Solid solutions
Supersaturation
Volcanoes
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Zusammenfassung:Bubble growth strongly affects the physical properties of degassing magmas and their eruption dynamics. Natural samples and products from quench experiments provide only a snapshot of the final state of volatile exsolution, leaving the processes occurring during its early stages unconstrained. In order to fill this gap, we present in situ high-temperature observations of bubble growth in magmas of different compositions (basalt, andesite and rhyodacite) at 1,100 to 1,240 °C and 0.1 MPa (1 bar), obtained using a moissanite cell apparatus. The data show that nucleation occurs at very small degrees of supersaturaturation (
ISSN:0010-7999
1432-0967
DOI:10.1007/s00410-014-0976-8