Eric Delcher

Institut de physique du globe de Paris

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Anthony Finizola

Observatoire des Sciences de l'Univers de la Réunion

Aline Peltier

Institut de physique du globe de Paris

Tullio Ricci

Istituto Nazionale di Geofisica e Vulcanologia

Stéphanie Barde‐Cabusson

Institut National de l'Énergie Solaire

Guilhem Barruol

Centre National de la Recherche Scientifique

Raphaël Antoine

Centre d'Études et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement

Fabrice R. Fontaine

Institut de physique du globe de Paris

Fabio Di Gangi

Istituto Nazionale di Geofisica e Vulcanologia

A. Revil

Université Savoie Mont Blanc

ÉB

Élodie Brothelande

University of Miami

Cooperative Institutions

Centre National de la Recherche Scientifique

Institut de Recherche pour le Développement

Institut de physique du globe de Paris

Université Paris Cité

Observatoire des Sciences de l'Univers de la Réunion

Laboratoire Magmas et Volcans

Écologie Marine Tropicale des Océans Pacifique et Indien

Istituto Nazionale di Geofisica e Vulcanologia

Université Clermont Auvergne

Sorbonne Paris Cité

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Hydrogeology of Stromboli volcano, Aeolian Islands (Italy) from the interpretation of resistivity tomograms, self-potential, soil temperature and soil CO2 concentration measurements

Geophysical Journal International (2011)

A. Revil Anthony Finizola Tullio Ricci Eric Delcher Aline Peltier

To gain a better insight of the hydrogeology and the location of the main tectonic faults of Stromboli volcano in Italy, we collected electrical resistivity measurements, soil CO2 concentrations, temperature and self-potential measurements along two profiles. These two profiles started at the village of Ginostra in the southwest part of the island. The first profile (4.8 km in length) ended up at the village of Scari in the north east part of the volcano and the second one (3.5 km in length) at Forgia Vecchia beach, in the eastern part of the island. These data were used to provide insights regarding the position of shallow aquifers and the extension of the hydrothermal system. This large-scale study is complemented by two high-resolution studies, one at the Pizzo area (near the active vents) and one at Rina Grande where flank collapse areas can be observed. The Pizzo corresponds to one of the main degassing structure of the hydrothermal system. The main degassing area is localized along a higher permeability area corresponding to the head of the gliding plane of the Rina Grande sector collapse. We found that the self-potential data reveal the position of an aquifer above the villages of Scari and San Vincenzo. We provide an estimate of the depth of this aquifer from these data. The lateral extension of the hydrothermal system (resistivity ∼15–60 ohm m) is broader than anticipated extending in the direction of the villages of Scari and San Vincenzo (in agreement with temperature data recorded in shallow wells). The lateral extension of the hydrothermal system reaches the lower third of the Rina Grande sector collapse area in the eastern part of the island. The hydrothermal body in this area is blocked by an old collapse boundary. This position of the hydrothermal body is consistent with low values of the magnetization (<2.5 A m−1) from previously published work. The presence of the hydrothermal body below Rina Grande raises questions about the mechanical stability of this flank of the edifice.

Electrical Resistivity Tomography

10.1111/j.1365-246x.2011.05112.x

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Citations (77)

The output and bio-cycling of Si in a tropical rain forest developed on young basalt flows (La Reunion Island)

Geoderma (2010)

J. D. Meunier S. Kirman Dominique Strasberg Éric Nicolini Eric Delcher

Biogeochemical Cycle

Cycling

Plant litter

Nutrient cycle

Biogeochemistry

Litter

10.1016/j.geoderma.2010.09.010

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Citations (23)

Mesure des débits par photogrammétrie adaptée aux rivières torrentielles

La Houille Blanche (2018)

André Stumpf Emmanuel Augereau Julien Bonnier Christophe Delacourt Eric Delcher

Face aux besoins de suivis hydrométriques et compte tenu des limites d'installation de stations de mesure traditionnelles sur les cours d'eau réunionnais à lit mobile et en tresse, l'Office de l'eau Réunion et les universités de Bretagne Occidentale et de La Réunion ont développé un système de mesure automatique des débits par photogrammétrie. Ce système innovant se base sur la mesure des vitesses d'écoulement de surface par la technique de la PIV (Particle Image Velocimetry), sur l'élaboration d'un modèle numérique de terrain du tronçon de mesure et une détection automatique du masque d'eau. Des algorithmes de calcul ont été développés sous MATLAB de manière (i) à traiter une vidéo acquise en temps réel ou pour réaliser des jaugeages à distance et (ii) à convertir un pack de vidéos acquises automatiquement toutes les 30 minutes afin d'obtenir une chronique de débit en continu. Les comparaisons avec les valeurs de débits jaugés ont montré des écarts maximums de 9.0 % après la calibration du système de mesure. Cette technologie, pouvant être autonome en énergie ou raccordée au réseau électrique, ouvre des perspectives intéressantes pour le suivi des cours d'eau complexe ou des phénomènes hydrologiques extrêmes.

10.1051/lhb/2018053

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Citations (1)

Raman spectroscopy as suitable tool for the field study of recent volcanic environments

Journal of Raman Spectroscopy (2016)

G. Guimbretière Aurélien Canizarès Anthony Finizola Eric Delcher N. Raimboux

In 2013, a portable Raman setup was implemented for on-site and rear-base characterization of volcanic products. Silica and rutile rock coatings, sulfate incrustations and speleothems, plagioclase, clinopyroxene, and (Fe, Ti, Cr) oxides lava minerals were identified on the young lava flows of Piton de la Fournaise volcano. These analytical abilities opens the way of in situ study of the first aging and weathering steps of recent lava flows. This paper relates the preliminary results of the field campaign. Three months after the investigation, all the speleothems have naturally disappeared. Copyright © 2016 John Wiley & Sons, Ltd.

Rutile

Ilmenite

10.1002/jrs.4887

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Citations (9)

Structural Control on Hydrothermal Fluid Circulations in Two Volcanoes of the Aeolian Archipelago, Stromboli and Vulcano (Italy)

AGU Fall Meeting Abstracts (2009)

Stéphanie Barde‐Cabusson Anthony Finizola Tullio Ricci Manuela Rossi Eric Delcher

Archipelago

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Kinematic and internal strain in lava flows spreading on irregular basements

EGS - AGU - EUG Joint Assembly (2003)

C. Buisson Claude Smutek Eric Delcher

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RAMAN STUDY OF SECONDARY MINERALS IN A RECENT LAVA TUBE

HAL (Le Centre pour la Communication Scientifique Directe) (2014)

G. Guimbretière Aurélien Canizarès Anthony Finizola Eric Delcher N. Raimboux

In this paper, we present first the technical adaptations made for a field use of the laboratory in situ spectrometer, its capabilities and limits as well. Secondly, we present identification of secondary mineral phases growing in the lava tube with a particular emphasis on the study of white speleothems and dendrites by mean of XRD, SEM-EDX and Raman spectroscopy.

10.13140/2.1.3413.1203

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Citations (1)

Dolines on ultramafic rocks: the case of the Southern Grande Terre of New Caledonia (SW Pacific

HAL (Le Centre pour la Communication Scientifique Directe) (2014)

Julie Jeanpert Pierre Genthon Jean‐Lambert Join M. Vendé-LeClerc Pierre Maurizot

Ultramafic rock

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The Thermal Plumbing System of Stromboli Volcano, Aeolian Islands (Italy) Inferred From Electrical Conductivity and Induced Polarization Tomography

Journal of Geophysical Research Solid Earth (2023)

A. Revil Anthony Finizola T. C. Johnson Tullio Ricci Marceau Gresse

Abstract We performed the first 3D island‐scale tomography of the electrical conductivity of Stromboli volcano (Aeolian Islands, Italy) using 2D acquisition lines (37.2 km) and a total of 18,880 measurements and 2,402 unique electrode locations. This 3D data set was inverted using a Gauss‐Newton algorithm, parallel‐processing on an unstructured tetrahedral mesh containing 678,420 finite‐element nodes and 3,580,145 elements to account for the topography of the volcanic island. The tomogram exhibits a conductive body (10 −2 –1.0 S m −1 ) consistent with the location of CO 2 and temperature anomalies observed at the ground surface. It corresponds to the hydrothermal system with high electrical conductivity associated with alteration. In order to confirm this interpretation, a 2.5D large‐scale induced polarization tomography was performed crossing the volcano. The joint interpretation of the conductivity and normalized chargeability is done with a petrophysical model previously tested and verified at both shield‐ and strato‐volcanoes. This model implies that alteration (through the effect of the cation exchange capacity associated with clay minerals and zeolites) plays a strong role in both controlling the electrical conductivity and normalized chargeability at Stromboli volcano. A temperature tomogram, derived from the geoelectrical measurements, is consistent with surface temperature anomalies and the Very Long Period (VLP) seismicity related to the mild‐explosive activity. This survey displays at 600 m a.s.l. a lateral shift in the highest temperature location, also corresponding to the source of VLP seismicity. Structural boundaries have a major role in the hottest hydrothermal fluids rising below the active crater terrace of Stromboli volcano.

Electrical Resistivity Tomography

Petrophysics

10.1029/2023jb026475

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Citations (3)

Volcano Destabilizations: From Observations to an Integrated Model of Active Deformation

AGUFM (2018)

Aline Peltier Fabrice J. Fontaine Anthony Finizola Nicole Richter Nicolas Villeneuve

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Citations (2)