Search Results - "Wyns, Robert"

Un âge crétacé inférieur probable pour les paléoaltérations latéritiques du graben de Saint-Maixent-l’École (seuil du Poitou) d’après l’étude isotopique (Rb-Sr, δ 18 O-δD, U-Th) de pisolites ferrugineux by Innocent, Christophe, Girard, Jean-Pierre, Wyns, Robert

“…Le début du Crétacé a été marqué en Europe occidentale par le développement de paléoaltérations de type latéritique. Les argiles rouges à cuirasse ferrugineuse…”
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Review: Hydrogeology of weathered crystalline/hard-rock aquifers—guidelines for the operational survey and management of their groundwater resources by Lachassagne, Patrick, Dewandel, Benoît, Wyns, Robert

“…Hard rocks or crystalline rocks (i.e., plutonic and metamorphic rocks) constitute the basement of all continents, and are particularly exposed at the surface…”
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The fracture permeability of Hard Rock Aquifers is due neither to tectonics, nor to unloading, but to weathering processes by Lachassagne, Patrick, Wyns, Robert, Dewandel, Benoît

“…Terra Nova, 23, 145–161, 2011 The hydrogeology of superficial (∼0–100 m b.g.l.) Hard Rock Aquifers (HRA; i.e. plutonic and metamorphic rocks) has so far been…”
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Petrogenesis and 40Ar/39Ar dating of hydrothermal romanechite from the sub-aerial fault-related Romanèche Mn deposit (France) by Dekoninck, Augustin, Ruffet, Gilles, Baptiste, Julien, Wyns, Robert, Philippo, Simon, Zhang, Yishen, Namur, Olivier

“…This study discusses the hydrothermal formation of romanechite (Ba0.7Mn4.5O10.1.1H2O) in the Romanèche Mn deposit and the significance of its age by combining…”
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A likely lower cretaceous age for the palaeolateritic formations of the Saint-Maixent-l'Ecole graben (Poitou saddle) as indicated by a Rb-Sr, delta O-18-delta D and U-Th isotopic study of ferrugineous pisoids by Innocent, Christophe, Girard, Jean-Pierre, Wyns, Robert

“…It has been previously established that Western Europe underwent an important episode of lateritic weathering during early cretaceous times. In this context,…”
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Un âge crétacé inférieur probable pour les paléoaltérations latéritiques du graben de Saint-Maixent-l'École (seuil du Poitou) d'après l'étude isotopique (Rb-Sr, δ18O-δD, U-Th) de pisolites ferrugineux by Innocent, Christophe, Girard, Jean-Pierre, Wyns, Robert

“…It has been previously established that Western Europe underwent an important episode of lateritic weathering during early Cretaceous times. In this context,…”
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Lower Cretaceous inversion of the European Variscan basement: record from the Vendée and Limousin (France) by François, Thomas, Barbarand, Jocelyn, Wyns, Robert

“…The post-orogenic evolution of the European Variscan basement remains difficult to constrain due to the absence of post-orogenic sedimentary records. One of…”
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Quaternary geomorphological evolution of a granitic shore platform constrained by in situ 10 Be concentrations, Penmarc’h, SW Brittany, France by Raimbault, Céline, Duperret, Anne, Regard, Vincent, Molliex, Stéphane, Wyns, Robert, Authemayou, Christine, Le Gall, Bernard

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A generalized 3-D geological and hydrogeological conceptual model of granite aquifers controlled by single or multiphase weathering by Dewandel, B., Lachassagne, P., Wyns, R., Maréchal, J.C., Krishnamurthy, N.S.

“…The weathered layers of crystalline rocks form aquifers that are of prime interest for water supply in hard rock areas. These weathering profiles generally…”
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Quaternary geomorphological evolution of a granitic shore platform constrained by in situ10Be concentrations, Penmarc’h, SW Brittany, France by Raimbault, Céline, Duperret, Anne, Regard, Vincent, Molliex, Stéphane, Wyns, Robert, Authemayou, Christine, Le Gall, Bernard

“…The Penmarc’h granitic coastal domain, SW Brittany (Western France), offers the opportunity to address the little investigated issue of erosional processes in…”
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Modelling the hydrological interactions between a fissured granite aquifer and a valley mire in the Massif Central, France by Duranel, Arnaud, Thompson, Julian R, Burningham, Helene, Durepaire, Philippe, Garambois, Stéphane, Wyns, Robert, Cubizolle, Hervé

“…We developed a high-resolution MIKE SHE/MIKE 11 model of a 231.3 ha headwater catchment in the granitic uplands of the French Massif Central to estimate the…”
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Respective roles of the weathering profile and the tectonic fractures in the structure and functioning of crystalline thermo-mineral carbo-gaseous aquifers by Dewandel, B., Alazard, M., Lachassagne, P., Bailly-Comte, V., Couëffé, R., Grataloup, S., Ladouche, B., Lanini, S., Maréchal, J.-C., Wyns, R.

“…•Multidisciplinary approach to understand a complex thermo-mineral hydrosystem.•The weathered fissured layer of the granite aquifer plays a major hydrodynamic…”
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Hard rock aquifer architecture and water circulation levels in the Strengbach critical zone observatory (France) by Chabaux, François, Négrel, Philippe, Gal, Frederick, Viville, Daniel, Ranchoux, Coralie, Van der Woerd, Jérome, Delay, Frederick, Ackerer, Julien, Aquilina, Luc, Diraison, Marc, Masson, Frédéric, Mériaux, Anne-Sophie, Labasque, Thierry, Lucas, Yann, Pezard, Philippe Adrien, Reuschlé, Thierry, Schmitt, Anne-Désirée, Stille, Peter, Wyns, Robert, Lerouge, Catherine, Dezayes, Chrystel

“…We present an integrated petrological, petrophysical, and hydrogeological study of the critical zone (CZ) developed in the Hercynian granitic basement of the…”
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Large-Scale Mapping of Hard-Rock Aquifer Properties Applied to Burkina Faso by Courtois, Nathalie, Lachassagne, Patrick, Wyns, Robert, Blanchin, Raymonde, Bougaïré, Francis D, Somé, Sylvain, Tapsoba, Aïssata

“…A country-scale (1:1,000,000) methodology has been developed for hydrogeologic mapping of hard-rock aquifers (granitic and metamorphic rocks) of the type that…”
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Geochemical tracing and modeling of surface and deep water–rock interactions in elementary granitic watersheds (Strengbach and Ringelbach CZOs, France) by Chabaux, F., Viville, D., Lucas, Y., Ackerer, J., Ranchoux, C., Bosia, C., Pierret, M. C., Labasque, T., Aquilina, L., Wyns, R., Lerouge, C., Dezaye, C., Négrel, P.

“…From the study of the Strengbach and Ringelbach watersheds we propose to illustrate the interest of combining the geochemical tracing and geochemical modeling…”
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Deciphering plume–lithosphere interactions beneath Europe from topographic signatures by Guillou-Frottier, Laurent, Burov, Evgenii, Nehlig, Pierre, Wyns, Robert

“…When a mantle plume rises and impinges on the base of the lithosphere, it expectably produces variations in surface topography. Taking into consideration a…”
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Palaeomagnetic dating of the “Borne de Fer” ferricrete (NE France): Lower Cretaceous continental weathering by Théveniaut, H., Quesnel, F., Wyns, R., Hugues, G.

“…A palaeomagnetic study was carried out on the Borne de Fer ferricrete in north-eastern France, close to the Luxembourg border. This ferricrete is overlain by…”
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Airborne gamma-ray spectrometry to quantify chemical erosion processes by Carrier, F., Bourdon, B., Pili, É., Truffert, C., Wyns, R.

“…Airborne gamma-ray spectrometry data (uranium, potassium and thorium contents) reveal geochemical heterogeneities within the monolithological Hyrôme watershed…”
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Magnetic resonance sounding (MRS) and resistivity characterisation of a mountain hard rock aquifer: the Ringelbach Catchment, Vosges Massif, France by Baltassat, J.M., Legchenko, A., Ambroise, B., Mathieu, F., Lachassagne, P., Wyns, R., Mercier, J.L., Schott, J.J.

“…ABSTRACT The Ringelbach catchment, which has been studied since 1975, is highly representative of the crystalline Vosges massif, where the water supply is…”
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