exsolution


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exsolution

[¦ek·sə′lü·shən]
(geology)
A phenomenon during which molten rock solutions separate when cooled.
References in periodicals archive ?
The resulting mechanical colour zoning is therefore linked to exsolution of these particles and also is epigenetic.
Okorusu magnetites exhibit abundant exsolutions of ulvospinel in a characteristic cloth texture, and oxidation exsolution occurred subsequently.
Engineers from Calgary-based Norwest felt that pressure from the mud circulation system would minimize exsolution of gasses from the oil sand and reduce the probability of slabbing from the shaft walls.
2]O saturation occurs by exsolution of an aqueous fluid to forma distinct phase in the silicate melt, at which point the fluid boils and gas bubbles form.
The assemblage titanite-magnetite-quartz-pyrrhotite may be a late auto-oxidation and sulphidation product of vapour exsolution (Candela 1991), as it is not consistent with high Fe (-Ti) biotite (Wones 1981).
The copper appears to have formed by epigenetic exsolution from elbaite.
The galena can contain up to 20% Ag (by weight) and in certain circumstances the gold may also be present as replacement or exsolution blebs in arsenopyrite or pyrite.
There is no kinetic barrier to heterogeneous nucleation of bubbles; therefore, the exsolution surface (level in the chamber or conduit) is synonymous with the saturation surface because volatiles exsolve during magma ascent (Fig.
The mineral is white and occurs generally interstitial to microcline and quartz, as an exsolution product within microcline crystals, and in irregular masses as much as 30 cm in maximum dimension.