0000000000347584

AUTHOR

J. L. Le Pennec

showing 1 related works from this author

Noble gas magmatic signature of the Andean Northern Volcanic Zone from fluid inclusions in minerals

2021

Trace volatile elements like He are key for understanding the mantle source signature of magmas and to better constrain the relative roles of subduction and crustal processes to the variability of along-arc chemical and isotopic signatures of magmatic fluids. Here we report on noble gas abundances and isotopic data of Fluid Inclusions (FIs) in eruptive products and/or fumarolic gases from the Colombia-Ecuador segment of Andean Northern Volcanic Zone (NVZ). FIs in olivine phenocrysts from Ecuador (El Reventador, Cotopaxi and Tungurahua) yield air-normalized corrected He-3/He-4 ratios of 7.0-7.4 R-A, within the MORB range (8 +/- 1 R-A). With exception of the Cotopaxi lavas (opx = 50 km at the…

010504 meteorology & atmospheric sciencesGeochemistryAndean Volcanic Belt Helium voclanic gases Crustal thickness Fluid inclusions Helium Noble gases Northern Volcanic Zoneengineering.material010502 geochemistry & geophysics01 natural sciencesHeliumMantle (geology)Noble gaseGeochemistry and Petrology[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/VolcanologyCrustal thickneFluid inclusions[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environmentVolatilesFluid inclusions0105 earth and related environmental sciencesgeographygeography.geographical_feature_categoryOlivineSubductionGeologyNorthern Volcanic ZoneFluid inclusionNoble gasesCrustal thicknessVolcanoAndean Volcanic BeltengineeringPhenocrystGeology
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