Search results for " mgmatic degassing"

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Shrinkage Bubbles: The C–O–H–S Magmatic Fluid System at San Cristóbal Volcano

2018

New analytical results for the composition of shrinkage bubbles (09-70 vol. %) in olivine-hosted (Fo <80%) primary melt inclusions (MIs) have been incorporated into a novel geochemical model for San Cristó bal volcano, Nicaragua. The vapour, liquid, and mineral components found inside shrinkage bubbles may represent relics of early C-O-H-S fluids exsolved from a magmatichydrothermal system. This conclusion is supported by high-resolution Raman microspectroscopy revealing: (1) gaseous CO2 (d=0·17-0·31 g/cm3 in 31 samples) coexisting with liquid H2O (in seven samples) at ambient temperature (<22°C) inside the shrinkage bubbles of naturally quenched inclusions; (2) several mineral phases (i.e.…

CO2 H2O SO2 mgmatic degassing melt inclusionsgeographyGEO/07 - PETROLOGIA E PETROGRAFIAMelt inclusiongeography.geographical_feature_category010504 meteorology & atmospheric sciencesSan CristóbalFluid system010502 geochemistry & geophysics01 natural sciencesGeophysicsVolcanoGeochemistry and PetrologyGEO/08 - GEOCHIMICA E VULCANOLOGIARaman spectroscopyShrinkage bubblePetrologyGeophysicCopperGeology0105 earth and related environmental sciencesShrinkageJournal of Petrology
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