A5048436671- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- High-pressure geophysics and materials
- Radioactive element chemistry and processing
- Hydrocarbon exploration and reservoir analysis
- Geological formations and processes
- Clay minerals and soil interactions
- Geological Studies and Exploration
- Geological Formations and Processes Exploration
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Building materials and conservation
- Groundwater and Isotope Geochemistry
- Mineralogy and Gemology Studies
- Concrete and Cement Materials Research
- CO2 Sequestration and Geologic Interactions
- Archaeological and Geological Studies
- Planetary Science and Exploration
- Astro and Planetary Science
- Geological Modeling and Analysis
Université de Rennes
2015-2024
Centre National de la Recherche Scientifique
2014-2024
Géosciences Rennes
2015-2024
Observatoire des Sciences de l'Environnement de Rennes
2011-2015
Terre des Hommes
2011-2014
Université Rennes 2
2008
Research Article| March 01, 2016 Nb-Ta fractionation in peraluminous granites: A marker of the magmatic-hydrothermal transition Christophe Ballouard; Ballouard 1Géosciences Rennes, UMR CNRS 6118, OSUR, Université Rennes 1, 35042 Cedex, France Search for other works by this author on: GSW Google Scholar Marc Poujol; Poujol Philippe Boulvais; Boulvais Yannick Branquet; Branquet France2Institut des Sciences de la Terre d’Orléans (ISTO), 6113 CNRS, d’Orléans, BRGM, Campus Géosciences, 1A rue...
Abstract. An increasing number of field examples in mountain belts show that the formation passive margins during extreme continent thinning may occur under conditions high to very thermal gradient beneath a thin cover syn-rift sediments. Orogenic resulting from tectonic inversion distal and regions exhumed continental mantle exhibit high-temperature, low-pressure (HT-LP) metamorphism coeval syn-extensional, ductile deformation. Recent studies have shown northern flank Pyrenean belt,...
The Paleoproterozoic Era witnessed crucial steps in the evolution of Earth's surface environments following first appreciable rise free atmospheric oxygen concentrations ∼2.3 to 2.1 Ga ago, and concomitant shallow ocean oxygenation. While most sedimentary successions deposited during this time interval have experienced thermal overprinting from burial diagenesis metamorphism, ca. black shales Francevillian B Formation (FB2) cropping out southeastern Gabon not. contains centimeter-sized...
Abstract: Albitization is a common metasomatic process active in various geodynamic contexts. In the northern Pyrenees, there are several occurrences of albitites but, until now, only one occurrence has been dated (117 Ma, Ar–Ar dating). This paper presents new U–Th–Pb ages for albitite throughout Pyrenees to test whether they contemporaneous and, if so, specify regional extent albitization event. Ages obtained from large euhedral titanite and monazite grains distinct 110 ± 8 98 2...
The analysis of texture, major element and oxygen isotope compositions cloudy garnet crystals from a metapelite sampled on Ikaria Island (Greece) is used to assess the model growth re-equilibration these reconstruct pressure–temperature–fluid history sample. Garnet show complex textural chemical zoning. cores (100–200 μm) are devoid fluid inclusions. They characterized by zoning demonstrated bell-shaped profile spessartine component (7–3 mol.%), an increase in grossular 14 22 mol.% δ18O...
Terra Nova, 23, 390–398, 2011 Abstract Although water is ubiquitous in the continental crust, its effect on geochronometers through mineral reequilibration rarely taken into account. Herein, we present 40 Ar/ 39 Ar analyses muscovite and U‐Pb isotopic data zircon monazite from a Variscan syn‐tectonic granite western France. Both K‐Ar systems were hydrothermally reset, whereas radiogenic system most of zircons was unaffected dates emplacement age. Titanium chemical maps obtained muscovites...
Research Article| October 01, 2013 Syn-tectonic, meteoric water–derived carbonation of the New Caledonia peridotite nappe Benoît Quesnel; Quesnel * 1Géosciences Rennes, Université Rennes 1, UMR 6118 CNRS, 35042 Cedex, France *E-mails: benoit.quesnel@univ-rennes1.fr; pierre.gautier@univ-rennes1.fr; philippe.boulvais@univ-rennes1.fr; michel.cathelineau@univ-lorraine.fr. Search for other works by this author on: GSW Google Scholar Pierre Gautier; Gautier Philippe Boulvais; Boulvais Michel...