exsolution


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exsolution

(ˌɛksəˈluːʃən)
n
(Geological Science) geology the process by which a homogenous solid solution, esp molten rock, separates into its constituent minerals upon cooling
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The reactivation and fragmentation of this crystal mush can trigger re-melting episodes, volatile exsolution, and an increase in the pressure of the whole system, all of which are expected conditions during an eruption episode (Parmigiani, Huber, & Bachmann, 2014).
The Fe-Ti oxides and the diaspore-boehmite needles all formed in the sapphire as a result of epigenetic solid exsolution (cf.
A textural intergrowth between calcite and dolomite can be interpreted as the result of exsolution of dolomite from calcite.
The extent of albite exsolution is variable, most probably because of difference in the composition of the original homogeneous alkali feldspar grains and/ or degree and rate of their undercooling below the crystallization temperature.
1999, Volatile exsolution at the Dinkidi Cu-Au porphyry deposit, Philippines: A melt-inclusion record of the initial ore-forming process: Geology, v.
The transparency is due to the lack of exsolution lamellae in some samples.
This excess pressure may be due to the formation of bubbles by gas exsolution, or to the fact that heat loss from the magma to its cooler surroundings causes the growth of crystals that are less dense than the magmatic liquid and so occupy a larger volume.
Fast cooling of volcanic ash avoids exsolution of feldspar and favours the preservation of magmatic sanidine; therefore calculation of the feldspar composition according to the method proposed by Orville can be estimated as accurate.