Výsledky vyhledávání - "Ariel Provost"

Akademický článek

Mass Eruption Rates of Tephra Plumes During the 2011–2015 Lava Fountain Paroxysms at Mt. Etna From Doppler Radar Retrievals

Autor: Valentin Freret-Lorgeril, Franck Donnadieu, Simona Scollo, Ariel Provost, Patrick Fréville, Yannick Guéhenneux, Claude Hervier, Michele Prestifilippo, Mauro Coltelli

Publikováno v: Frontiers in Earth Science, Vol 6 (2018)

Real-time estimation of eruptive source parameters during explosive volcanic eruptions is a major challenge in terms of hazard evaluation and risk assessment as these inputs are essential for tephra dispersal models to forecast the impact of ash plum

Externí odkaz: https://doaj.org/article/e7a79400c19349c69b318207f42284d8

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An experimental study of dissolution and precipitation of forsterite in a thermal gradient: implications for cellular growth of olivine phenocrysts in basalt and melt inclusion formation

Autor: Pierre Schiano, Kazuhiko Ito, Mickael Laumonier, Ariel Provost, Didier Laporte, François Faure

Publikováno v: Contributions to Mineralogy and Petrology
Contributions to Mineralogy and Petrology, 2019, 174, ⟨10.1007/s00410-019-1627-x⟩
Contributions to Mineralogy and Petrology, Springer Verlag, 2019

Co-auteur étranger; International audience; The morphology of crystals in magmas strongly depends on the temperature regime of the system, in particular the degree of undercooling and the cooling rate. To simulate low degrees of undercooling, we dev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a31be509d9192c8f1e03fee8407481a3
https://doi.org/10.1007/s00410-019-1627-x

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P – V – T – X evolution of olivine-hosted melt inclusions during high-temperature homogenization treatment

Autor: Federica Schiavi, Nicolas Cluzel, Ariel Provost, Pierre Schiano

Publikováno v: Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2016, 172, pp.1-21. ⟨10.1016/j.gca.2015.09.025⟩
Geochimica et Cosmochimica Acta, 2016, 172, pp.1-21. ⟨10.1016/j.gca.2015.09.025⟩

International audience; During low–high temperature (T) cycles imposed on olivine-hosted melt inclusions (MIs) we observe a systematic increase in homogenization temperature (Th) with time, regardless of their initial major-element and H2O contents

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::731fbe3fda8a0f49a841f89c231ec26a
https://hal.uca.fr/hal-01638319

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Kinetics of heterogeneous bubble nucleation in rhyolitic melts: implications for the number density of bubbles in volcanic conduits and for pumice textures

Autor: Didier Laporte, Ariel Provost, Nicolas Cluzel, I. Kannewischer

Publikováno v: Contributions to Mineralogy and Petrology
Contributions to Mineralogy and Petrology, Springer Verlag, 2008, 156 (6), pp.745-763. ⟨10.1007/s00410-008-0313-1⟩
Contributions to Mineralogy and Petrology, 2008, 156 (6), pp.745-763. ⟨10.1007/s00410-008-0313-1⟩

We performed decompression experiments to simulate the ascent of a phenocryst-bearing rhyolitic magma in a volcanic conduit. The starting materials were bubble-free rhyolites water-saturated at 200 MPa–800°C under oxidizing conditions: they contai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9582dd7870da4306ef558073cd89d352
https://doi.org/10.1007/s00410-008-0313-1

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Transcrystalline Melt Migration and Earth's Mantle

Autor: Roberto Clocchiatti, Pierre Schiano, François Faure, Ariel Provost

Publikováno v: Science. 314:970-974

Plate tectonics and volcanism involve the formation, migration, and interaction of magma and gas. Experiments show that melt inclusions subjected to a thermal gradient migrate through olivine crystals, under the kinetic control of crystal-melt interf

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32d53d12b4bdea41fb54231a4f674510
https://doi.org/10.1126/science.1132485

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An experimental study of Ostwald ripening of olivine and plagioclase in silicate melts: implications for the growth and size of crystals in magmas

Autor: Hugues Cabane, Ariel Provost, Didier Laporte

Publikováno v: Contributions to Mineralogy and Petrology. 150:37-53

We carried out an experimental study to characterize the kinetics of Ostwald ripening in the forsterite-basalt system and in the plagioclase (An65)-andesite system. Eight experiments were done in each system to monitor the evolution of mean grain siz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43cd04c8d0f20ce29c840a5734689409
https://doi.org/10.1007/s00410-005-0002-2

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Experimental investigation of the kinetics of Ostwald ripening of quartz in silicic melts

Autor: Hugues Cabane, Ariel Provost, Didier Laporte

Publikováno v: Contributions to Mineralogy and Petrology. 142:361-373

To characterise the kinetics of Ostwald ripening of quartz, we conducted four series of experiments in systems consisting of quartz, with an initial grain size of ≈1.3 to 6 µm, in equilibrium with hydrous silicic liquids. Two series were performed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe0065ec011e83d99868e1bbe7a23d2a
https://doi.org/10.1007/s004100100296

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Equilibrium geometry of a fluid phase in a polycrystalline aggregate with anisotropic surface energies: Dry grain boundaries

Autor: Didier Laporte, Ariel Provost

Publikováno v: Journal of Geophysical Research: Solid Earth. 105:25937-25953

The equilibrium distribution of a fluid phase in a rock is controlled by the ratio of grain boundary energy to solid-fluid interfacial energy (“surface energy”). A strong dependence of interfacial energy on interface orientation (anisotropy) is t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84483911105570e894d3ba049bcd1564
https://doi.org/10.1029/2000jb900256

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Thermochemical dynamics of magma chambers: A simple model

Autor: Catherine C. Mourtada-Bonnefoi, Francis Albarède, Ariel Provost

Publikováno v: Scopus-Elsevier

A magma chamber may be considered as an open, non adiabatic chemical reactor that continuously receives new liquid, crystallizes, and erupts lava. Heat is transferred to the walls, and crystals settle on the chamber floor. Considering, for simplicity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfc3b843f00dc613a8fdde82b12bcaea
https://doi.org/10.1029/1998jb900112

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Magma ascent rate and initial water concentration inferred from diffusive water loss from olivine-hosted melt inclusions

Autor: Nicolas Cluzel, Ariel Provost, Yang Chen, Pierre Schiano

Publikováno v: Contributions to Mineralogy and Petrology
Contributions to Mineralogy and Petrology, Springer Verlag, 2013, 165, pp.525-541. ⟨10.1007/s00410-012-0821-x⟩
Contributions to Mineralogy and Petrology, 2013, 165, pp.525-541. ⟨10.1007/s00410-012-0821-x⟩

International audience; As the water concentration in magma decreases during magma ascent, olivine-hosted melt inclusions will reequilibrate with the host magma through hydrogen diffusion in olivine. Previous models showed that for a single spherical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::254068f8224a3d381dc894422ff54fc3
https://hal.archives-ouvertes.fr/hal-01058372

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