Search Results - "Lafay, Romain"

Pressure–temperature estimates of the lizardite/antigorite transition in high pressure serpentinites by Schwartz, Stéphane, Guillot, Stéphane, Reynard, Bruno, Lafay, Romain, Debret, Baptiste, Nicollet, Christian, Lanari, Pierre, Auzende, Anne Line

“…Serpentine minerals in natural samples are dominated by lizardite and antigorite. In spite of numerous laboratory experiments, the stability fields of these…”
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High-pressure serpentinites, a trap-and-release system controlled by metamorphic conditions: Example from the Piedmont zone of the western Alps by Lafay, Romain, Deschamps, Fabien, Schwartz, Stéphane, Guillot, Stéphane, Godard, Marguerite, Debret, Baptiste, Nicollet, Christian

“…We provide new insights into the geochemistry of serpentinites from the Alpine orogenic wedge representing a paleo-subduction zone. These serpentinites are…”
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Trace element behavior during serpentinization/de-serpentinization of an eclogitized oceanic lithosphere: A LA-ICPMS study of the Lanzo ultramafic massif (Western Alps) by Debret, Baptiste, Andreani, Muriel, Godard, Marguerite, Nicollet, Christian, Schwartz, Stéphane, Lafay, Romain

“…Serpentinites are one of the major components of the oceanic lithosphere and are stable in the slab and the mantle wedge up to 100–150km depth in subduction…”
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Mineral replacement rate of olivine by chrysotile and brucite under high alkaline conditions by Lafay, Romain, Montes-Hernandez, German, Janots, Emilie, Chiriac, Rodica, Findling, Nathaniel, Toche, Francois

“…Olivine mineral replacement by serpentine is one major alteration reaction of oceanic hydrothermalism. In the present experimental study, olivine grains were…”
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Simultaneous precipitation of magnesite and lizardite from hydrothermal alteration of olivine under high-carbonate alkalinity by Lafay, Romain, Montes-Hernandez, German, Janots, Emilie, Chiriac, Rodica, Findling, Nathaniel, Toche, François

“…The present study reports original experiments in order to investigate the simultaneous serpentinization and carbonation of olivine with relevance in Earth…”
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Fossil oceanic core complexes in the Alps. New field, geochemical and isotopic constraints from the Tethyan Aiguilles Rouges Ophiolite (Val d’Hérens, Western Alps, Switzerland) by Decrausaz, Thierry, Müntener, Othmar, Manzotti, Paola, Lafay, Romain, Spandler, Carl

“…Exhumation of basement rocks on the seafloor is a worldwide feature along passive continental margins and (ultra-) slow-spreading environments, documented by…”
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Mantle exhumation at magma-poor passive continental margins. Part II: Tectonic and metasomatic evolution of large-displacement detachment faults preserved in a fossil distal margin domain (Saraillé lherzolites, northwestern Pyrenees, France) by Lagabrielle, Yves, Asti, Riccardo, Fourcade, Serge, Corre, Benjamin, Labaume, Pierre, Uzel, Jessica, Clerc, Camille, Lafay, Romain, Picazo, Suzanne

“…In two companion papers we report the detailed geological and mineralogical study of two emblematic serpentinized ultramafic bodies of the western North…”
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Intracrystalline Reaction-Induced Cracking in Olivine Evidenced by Hydration and Carbonation Experiments by Romain Lafay, German Montes-Hernandez, François Renard, Pierre Vonlanthen

“…In order to better understand the microtextural changes associated with serpentinization reactions, natural millimeter-sized olivine grains were experimentally…”
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Mantle exhumation at magma-poor passive continental margins; Part I, 3D architecture and metasomatic evolution of a fossil exhumed mantle domain (Urdach Lherzolite, north-western Pyrenees, France) by Lagabrielle, Yves, Asti, Riccardo, Fourcade, Serge, Corre, Benjamin, Poujol, Marc, Uzel, Jessica, Labaume, Pierre, Clerc, Camille, Lafay, Romain, Picazo, Suzanne, Maury, René

“…In two companion papers, we report the detailed geological and mineralogical study of two emblematic serpentinized ultramafic bodies of the western North…”
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Nucleation and Growth of Chrysotile Nanotubes in H2SiO3/MgCl2/NaOH Medium at 90 to 300 °C by Lafay, Romain, Montes-Hernandez, German, Janots, Emilie, Chiriac, Rodica, Findling, Nathaniel, Toche, François

“…Herein, we report new insights into the nucleation and growth processes of chrysotile nanotubes by using batch and semi‐continuous experiments. For the…”
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Preservation of mantle heterogeneities and serpentinization signature during antigorite dehydration: The example of the Bergell contact aureole by Lafay, Romain, Baumgartner, Lukas P., Delacour, Adélie

“…Major, minor, and trace element geochemistry as well as iron oxidation state and isotopes were investigated in serpentinites and olivine‐talc fels present…”
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Protracted hydrothermal alteration recorded at the microscale in the Chenaillet ophicarbonates (Western Alps): Insights from in situ δ18O thermometry in serpentine, carbonate and magnetite by Scicchitano, Maria Rosa, Lafay, Romain, Valley, John W., Kita, Noriko T., Nachlas, William O.

“…The study of serpentinites and ophicarbonates from ophiolitic terrains provides a three-dimensional perspective on the hydration and carbonation processes…”
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Diffusion timescale conundrum in contact metamorphism: Oxygen isotope and trace element profiles in dolomite by Bégué, Florence, Baumgartner, Lukas P., Bouvier, Anne-Sophie, Escrig, Stéphane, Lafay, Romain, Meibom, Anders, Müller, Thomas

“…Successful application of diffusion chronometry is based on detailed knowledge of diffusion parameters obtained from laboratory experiments, which also need to…”
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Petrologic and stable isotopic studies of a fossil hydrothermal system in ultramafic environment (Chenaillet ophicalcites, Western Alps, France): Processes of carbonate cementation by Lafay, Romain, Baumgartner, Lukas P., Stephane, Schwartz, Suzanne, Picazo, German, Montes-Hernandez, Torsten, Vennemann

“…The Late Jurassic Chenaillet ophiolitic complex (Western Alps) represents parts of an oceanic core-complex of the Liguria-Piemonte domain. A model for the…”
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New constraints on carbonation associated with brecciation in hyperextended margins (example of Iberia and Newfoundland margins) by Picazo, Suzanne, Lafay, Romain, Faucheux, Vincent, Vennemann, Torsten

“…The sequestration of CO2 occurs naturally in (ultra)‐mafic rocks by carbonation processes and is commonly noted in areas of the seafloor where mantle…”
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Oxygen isotope disequilibrium during serpentinite dehydration by Lafay, Romain, Baumgartner, Lukas P., Putlitz, Benita, Siron, Guillaume

“…Talc + olivine in metaperidotites result from the serpentinite breakdown due to increasing temperature in the Bergell contact aureole. Jack‐straw olivine…”
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Metasomatism of the off-cratonic lithospheric mantle beneath Hangay Dome, Mongolia: Constraints from trace-element modelling of lherzolite xenoliths by Kourim, Fatma, Wang, Kuo-Lung, Beinlich, Andreas, Chieh, Chia-Ju, Dygert, Nick, Lafay, Romain, Kovach, Victor, Michibayashi, Katsuyoshi, Yarmolyuk, Vladimir, Iizuka, Yoshiyuki

“…Interactions of hydrous fluid and melt with dry mantle rocks are known to result in metasomatic alteration of the lithospheric mantle. Here we investigate such…”
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Pervasive carbonation of peridotite to listvenite (Semail Ophiolite, Sultanate of Oman): clues from iron partitioning and chemical zoning by Decrausaz, Thierry, Godard, Marguerite, Menzel, Manuel D., Parat, Fleurice, Oliot, Emilien, Lafay, Romain, Barou, Fabrice

“…Earth's long-term cycling of carbon is regulated from mid-ocean ridges to convergent plate boundaries by mass transfers involving mantle rocks. Here we examine…”
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Experimental Assessment of CO2‑Mineral-Toxic Ion Interactions in a Simplified Freshwater Aquifer: Implications for CO2 Leakage from Deep Geological Storage by Montes-Hernandez, German, Renard, François, Lafay, Romain

“…The possible intrusion of CO2 into a given freshwater aquifer due to leakage from deep geological storage involves a decrease in pH, which has been directly…”
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Experimental Assessment of CO^sub 2^-Mineral-Toxic Ion Interactions in a Simplified Freshwater Aquifer: Implications for CO^sub 2^ Leakage from Deep Geological Storage by Montes-Hernandez, German, Renard, François, Lafay, Romain

“…The possible intrusion of CO2 into a given freshwater aquifer due to leakage from deep geological storage involves a decrease in pH, which has been directly…”
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