Clinopyroxene solid solutions and water in magmas: results in the system phonolitic tephrite-H2O
- 1 September 1983
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 47 (344) , 347-351
- https://doi.org/10.1180/minmag.1983.047.344.09
Abstract
Clinopyroxene solid solutions crystallized at Ptot = 2 kbar in the natural system phonolitic tephrite-H2O (lava type from Etna eruption 1971) indicate a linear increase of ln Xcpxcats with H2Oliq %. After coupling this with the In Xcpxcats pressure dependence found through experiments, a simple relation has been set up for clinopyroxene- and plagioclase-bearing magmas. This relation allows us to calculate the amount of water dissolved in the melt, at any known pressure in the crustal range.Keywords
This publication has 3 references indexed in Scilit:
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- Some high-pressure pyroxenesMineralogical Magazine, 1974
- Mount Etna and the 1971 eruption - Oxygen and sulphur fugacities of magmatic gases directly measured in active vents of Mount EtnaPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1973