A5072625402- Geophysical and Geoelectrical Methods
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Seismic Waves and Analysis
- Geophysical Methods and Applications
- Hydraulic Fracturing and Reservoir Analysis
- Hydrocarbon exploration and reservoir analysis
- Drilling and Well Engineering
- Geological and Geophysical Studies Worldwide
- Reservoir Engineering and Simulation Methods
- Groundwater and Isotope Geochemistry
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- High-pressure geophysics and materials
- Geological Modeling and Analysis
- Geology and Paleoclimatology Research
- Geological and Tectonic Studies in Latin America
- Geological formations and processes
- Karst Systems and Hydrogeology
- Methane Hydrates and Related Phenomena
- Groundwater flow and contamination studies
- Earthquake Detection and Analysis
- CO2 Sequestration and Geologic Interactions
- Landslides and related hazards
Géosciences Montpellier
2016-2025
Université de Montpellier
2013-2024
Centre National de la Recherche Scientifique
2012-2024
Milieux environnementaux, transferts et interactions dans les hydrosystèmes et les sols
2013-2015
Institut des Sciences de la Terre
1998-2014
Centre de Recherche et d’Enseignement de Géosciences de l’Environnement
1996-2001
Château Gombert
1992-1998
Laboratoire de Mesure du Carbone 14
1998
Magma (Germany)
1998
Laboratoire Magmas et Volcans
1996-1998
Electrokinetic phenomena are responsible for several electrical properties of fluid‐saturated porous materials. Geophysical applications these could include the use streaming potentials mapping subsurface fluid flow, study hydrothermal activity geothermal areas, and in context earthquake prediction volcanic forecasting, example. The key parameter electrokinetic is ξ potential, which represents roughly potential at mineral/water interface. We consider silica‐dominated materials filled with a...
Hole 504B is by far the deepest hole yet drilled into oceanic crust in situ, and it therefore provides most complete “ground truth” now available to test our models of structure evolution upper crust. Cored eastern equatorial Pacific Ocean 5.9‐m.y.‐old that formed at Costa Rica Rift, extends a total depth 1562.3 m below seafloor, penetrating 274.5 sediments 1287.8 basalts. The site was located where rapidly accumulating impede active hydrothermal circulation As result, conductive heat flow...
The brittle to ductile transition (BDT) in rocks may strongly influence their transport properties (i.e., permeability, porosity topology…) and the maximum depth temperature where hydrothermal fluids circulate. To examine this context of Icelandic crust, we conducted deformation experiments on a glassy basalt (GB) glass‐free (GFB) under oceanic crust conditions. Mechanical micro‐structural observations at constant strain rate 10 −5 s −1 confining pressure 100–300 MPa indicate that are...
The electrical resistivity, porosity, and cation exchange capacity (CEC) of mid‐ocean ridge basalt (MORB) samples from Deep Sea Drilling Project hole 504B have been measured in the laboratory. presence chlorites, zeolites particularly smectites as alteration products MORB is reflected by high values CEC, with uniform CEC massive units layers 2A 2B, even higher pillows. porosity “intrinsic” formation factor are related, units, an inverse power law similar to Archie's formula, m = 1.0 a 10.0....
Abstract. Surface electrical resistivity tomography (ERT) is a widely used tool to study seawater intrusion (SWI). It noninvasive and offers high spatial coverage at low cost, but its imaging capabilities are strongly affected by decreasing resolution with depth. We conjecture that the use of CHERT (cross-hole ERT) can partly overcome these limitations since electrodes placed depth, which implies model does not decrease depths interest. The objective this test for SWI monitoring dynamics...
Eruption of 1-million-year-old tholeiitic basalt >1800 meters below sea level (>18 megapascals) in a backarc rift behind the Bonin arc produced scoriaceous breccia similar some respects to that formed during subaerial eruptions. Explosion magma is thought have frothy agglutinate which welded either on floor or submarine eruption column. The resulting 135-meter-thick pyroclastic deposit has paleomagnetic inclinations are random at scale <2.5 meters. High magmatic water content, about 1.3...
Abstract Fault rock assemblages reflect interaction between deformation, stress, temperature, fluid, and chemical regimes on distinct spatial temporal scales at various positions in the crust. Here we interpret measurements made hanging‐wall of Alpine during second stage Deep Drilling Project (DFDP‐2). We present observational evidence for extensive fracturing high hydraulic conductivity (∼10 −9 to 10 −7 m/s, corresponding permeability ∼10 −16 −14 m 2 ) extending several hundred meters from...
Abstract The Oman Drilling Project “Multi‐Borehole Observatory” (MBO) samples an area of active weathering tectonically exposed peridotite. This article reviews the geology MBO region, summarizes recent research, and provides new data constraining ongoing alteration. Host rocks are partially to completely serpentinized, residual mantle harzburgites, replacive. Dunites show evidence for “reactive fractionation,” in which cooling, crystallizing magmas reacted with older residues melting....
Mantle processes control plate tectonics and exert an influence on biogeochemical cycles. However, the proportion of mantle sampled in-situ is minimal, as it buried beneath igneous crust sediments. Here we report lithological characteristics two sections from embryonic ocean drilled by International Ocean Discovery Program (IODP) in Tyrrhenian Sea. Contrary to at Mid Ridges (MORs) hyperextended passive margins, our findings reveal exceptionally heterogeneous fertile lithologies, ranging...
The Tyrrhenian Sea is a young back-arc basin that has been shaped by various complex geologic processes, such as crustal thinning, mantle exhumation, and localized magmatism. For the last half-century, basement of was sampled during several ocean-drilling campaigns. past expedition DSDP 42 ODP107 revealed in addition to continental rocks passive margins, also includes mafic characteristic an oceanic domain, serpentinized peridotites indicative exhumed mantle. In 2024, IODP Expedition 402...
In reservoir engineering, hydrodynamic properties can be estimated from downhole electrical data using heuristic models (e.g., Archie and Kozeny-Carman's equations) relating conductivity to porosity permeability. Although proven predictive for many sandstone reservoirs, the mostly fail when applied carbonate reservoirs that generally display extremely complex pore network structures. this article, we investigate control of three-dimensional (3-D) geometry morphology on flow properties,...
Borehole electrical images were recorded in the upper crystalline basement of Cajon Pass scientific drillhole as part an extensive program downhole experiments. In spite large borehole size and high resistivity rocks, excellent obtained from 850 m to 1820 m. Such oriented resolve texture igneous provide a means identifying mapping open or mineralized fractures. order study more precisely response features, they compared sections where cores had been recovered. The are good agreement with...
Electrical potential anomalies are often measured associated with geothermal areas and volcanoes. In these systems, fluid flow is usually mostly restricted to faults fracture networks. An equation describing electrical of electrokinetic nature upflow induced by a thermal source along derived. The anomaly related the depth reservoir, temperature difference between surface reservoir area, expansion water, streaming coupling coefficient in fault zone. A quantitative calculation provided...
Most of the Mediterranean coastal porous aquifers are intensively exploited. Because climatic and anthropogenic effects, understanding physical geological controls on groundwater distribution flow dynamics in such is crucial. This study presents results a structural investigation system located along coastline Gulf Lions (NW Mediterranean). A key aspect this relies an onshore‐offshore integrated approach combining outcrops, seismic profiles, borehole data analysis. multidisciplinary provides...