0000000000651490

AUTHOR

Jean Vandemeulebrouck

showing 3 related works from this author

Fumarolic tremor and geochemical signals during a volcanic unrest

2017

Fumaroles are known to generate seismic and infrasonic tremor, but this fumarolic tremor has so far received little attention. Seismic records taken near the Pisciarelli fumarole, a vigorously degassing vent of the restless Campi Flegrei volcano in Italy, reveal a fumarolesourced tremor whose amplitude has recently intensified. We use independent geochemical evidence to interpret this fumarolic tremor for the first time quantitatively. We find that the temporal increase in fumarolic tremor RSAM (real-time seismic-amplitude measurement) quantitatively correlates with increases in independent proxies of fumarole activity, including the CO2concentrations in the fumarole's atmospheric plume, th…

010504 meteorology & atmospheric sciencesGeochemistryGeology010502 geochemistry & geophysics01 natural sciencesVolcanic unrestGeology0105 earth and related environmental sciences
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Magmas near the critical degassing pressure drive volcanic unrest towards a critical state

2016

During the reawaking of a volcano, magmas migrating through the shallow crust have to pass through hydrothermal fluids and rocks. The resulting magma–hydrothermal interactions are still poorly understood, which impairs the ability to interpret volcano monitoring signals and perform hazard assessments. Here we use the results of physical and volatile saturation models to demonstrate that magmatic volatiles released by decompressing magmas at a critical degassing pressure (CDP) can drive volcanic unrest towards a critical state. We show that, at the CDP, the abrupt and voluminous release of H2O-rich magmatic gases can heat hydrothermal fluids and rocks, triggering an accelerating deformation …

010504 meteorology & atmospheric sciencesScienceGeneral Physics and AstronomyPoison control010502 geochemistry & geophysics01 natural sciencesGeneral Biochemistry Genetics and Molecular BiologyHydrothermal circulationArticlePhysics and Astronomy (all)PetrologyVolcanic unrest0105 earth and related environmental sciencesgeographyMultidisciplinarygeography.geographical_feature_categoryBiochemistry Genetics and Molecular Biology (all)QChemistry (all)CrustGeneral ChemistryPhysics and Astronomy (all) Volcano Eruption Unrest Campi FlegreiVolcano13. Climate actionMagmaRock failureGeologyPressure.drive
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Hydrothermal fluid flow structures at Solfatara volcano, Somma-Vesuvius volcanic complex and Mt. Etna

2016

Solfatara (Campi Flegrei):We present the first detailed 3-D Resistivity model of the Solfatara-Pisciarelli area, obtained from numerousERT surveys during the “MED-SUV” Project. This inversion was performed by taking into account 44 000ERT data points, as well as surface e-m resistivity measurements and the magneto-tellurics model from A.Siniscalchi et al. respectively as surface and bottom boundary conditions. The 3-D resistivity structure wellmatches with the CO2 flux, temperature and self-potential variations at the crater surface. This model clearlyhighlights the main geological units of the area (Monte Olibano, Solfatara crypto-dome, layers of eruptivedeposits), and the structures of hy…

Etna Solfatara VesuviumSettore GEO/08 - Geochimica E Vulcanologia
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