ISSN:
1432-0819
Keywords:
Key words Gum rosin
;
Hydrated magma
;
Foams
;
Explosive decompression
;
Supersaturation
;
Bubble growth
;
Pumice
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract Solutions of gum rosin and acetone reproduce the volatile- and temperature-dependent viscosity, together with the phase behaviour, of hydrated magmas. A range of experimental exsolution conditions was investigated, including the variation of supersaturation, rate of decompression, solution temperature and volatile content. Degassing processes were controlled by the formation of an exsolution interface above a supersaturated liquid. The end-products ranged from a mildly degassed liquid to a solid foam, which preserved strained vesicles. Solutions of gum rosin and acetone are proposed as a suitable analogue system with which to study magma degassing processes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00265425
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