Chondrites are considered as the most primitive meteorites and represent a tangible record of astrophysical and geologic processes that occurred during the first 5-10 Ma of solar system history within the protoplanetary disk that surrounded the proto-Sun after its birth 4,567 Ga ago. They are presently our best witness-samples to understand the...
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December 7, 2020 (v1)Conference paperUploaded on: December 4, 2022
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2020 (v1)Journal article
Comparative planetology studies are key for understanding the main processes driving planetary formation and evolution. None have been yet applied to pristine asteroids formed in the solar protoplanetary disk, mainly because of their comminution during their 4.5-billion-year collisional lifetime. From remarkable textural, mineralogical,...
Uploaded on: December 4, 2022 -
April 1, 2009 (v1)Journal article
Most mass extinctions during the last 500 m.y. coincide with eruptions of large igneous provinces (LIP): the Cretaceous-Tertiary extinction was synchronous with the Deccan flood volcanism, Permian-Triassic extinction with the eruption of the enormous Siberian Traps, and End-Guadalupian extinction with the Emeishan volcanic province. The causal...
Uploaded on: December 3, 2022 -
December 2017 (v1)Journal article
Early Solar System planetesimal thermal models predict the heating of the chondritic protolith and the preservation of a chondritic crust on differentiated parent bodies. Petrological and geochemical analyses of chondrites have suggested that secondary alteration phases formed at low temperatures (<300 °C) by fluid-rock interaction where...
Uploaded on: December 4, 2022 -
June 2010 (v1)Journal article
Reply to Grzegorz Racki for his comment on our manuscript and for his overall support for the hypothesis that the nature of the rocks in the substrate of large igneous province has an important influence on their environmental impact (Ganino and Arndt, 2009).
Uploaded on: December 4, 2022 -
2010 (v1)Book
Les Sciences de la Terre sont nées de la géologie minière. Aujourd'hui, l'industrie a toujours besoin de matières premières (métaux et pétrole) et il est indispensable de connaître la nature et la genèse des gisements miniers. Un gisement doit être exploité au mieux en alliant rentabilité et contraintes environnementales. Ce manuel présente les...
Uploaded on: December 4, 2022 -
May 2019 (v1)Journal article
Our knowledge of active magmatic hydrothermal system (or magmatic vapors) is largely related to the modeling of geochemical processes including heterogeneous equilibrium calculations with variable bulk composition, temperature or pressure. With the aim to constrain the characteristics of extinct hydrothermal systems it is necessary to look for...
Uploaded on: December 4, 2022 -
January 2023 (v1)Journal article
Wang et al. (2023) propose that rocks adjacent to the Panzhihua intrusion are not marbles and skarns, but carbonatites. If true, this interpretation could have important implications for models explaining the origin of the large Fe-Ti ore deposits in the intrusion. We reject this interpretation for two principal reasons: 1) the objects...
Uploaded on: April 16, 2023 -
November 2019 (v1)Journal article
Chondrules are one of the major components of primitive meteorites. Their sphericity indicates they formed as molten fragments or droplets but conditions and mechanisms of chondrule formation remain unknown. A possible scenario is their formation during hypervelocity impacts and ejections. To challenge this idea, we prepared an experiment that...
Uploaded on: December 3, 2022 -
2023 (v1)Journal article
Seismological models from Apollo missions provided the first records of the Moon inner structure with a decrease in seismic wave velocities at the core–mantle boundary1,2,3. The resolution of these records prevents a strict detection of a putative lunar solid inner core and the impact of the lunar mantle overturn in the lowest part of the Moon...
Uploaded on: May 11, 2023 -
May 20, 2018 (v1)Conference paper
International audience
Uploaded on: December 4, 2022 -
2018 (v1)Journal article
In this study, we investigate grain growth within pure olivine systems through numerical simulations. The level set (LS) approach within a finite element (FE) context enables modeling 3D microstructural evolutions such as grain growth. As this phenomenon is inherently a 3D mechanism, the comparison between 2D and 3D models shows differences...
Uploaded on: December 4, 2022 -
August 2008 (v1)Journal article
In SW China, several large magmatic Fe-Ti-V oxide ore deposits are hosted by gabbroic intrusions associated with the Emeishan flood basalts. The Panzhihua gabbroic intrusion, a little deformed sill that contains a large titanomagnetite deposit at its base, concordantly intrudes late- Proterozoic dolostones. Mineralogical and chemical studies of...
Uploaded on: December 3, 2022 -
2021 (v1)Journal article
Abstract. This paper presents a new mesoscopic full field approach for the modeling of microstructural evolutions and mechanical behavior of olivine aggregates. The mechanical framework is based on a reduced crystal plasticity (CP) formulation which is adapted to account for non-dislocation glide strain-accommodating mechanisms in olivine...
Uploaded on: December 3, 2022 -
January 22, 2018 (v1)Conference paper
Le phénomène de croissance de grains peut être vu comme une migration des interfaces entre grains pilotée par la minimisation de l'énergie surfacique du réseau de joints de grains. Ces interfaces séparent deux domaines d'orientations cristallographiques différentes et possèdent une énergie par unité de surface dépendant du matériau considéré,...
Uploaded on: February 28, 2023 -
April 8, 2018 (v1)Conference paper
International audience
Uploaded on: December 4, 2022 -
November 2018 (v1)Journal article
Hypervelocity impacts are common in the solar system, in particular during its early phases when primitive bodies of contrasted composition collided. Whether these objects are chemically modified during the impact process, and by what kind of processes, e.g., chemical mixing or gas–liquid–solid fractionation, are still pending questions. To...
Uploaded on: December 4, 2022 -
July 14, 2023 (v1)Journal article
Abstract We present the results of a campaign of hypervelocity impact experiments on natural mesosiderite targets, using representative main asteroid belt impact speeds. The objective is to document further the surface evolution of iron-rich asteroids. In contrast with iron meteorites, we demonstrate the fragile behavior of mesosiderite at...
Uploaded on: February 16, 2024 -
May 2, 2010 (v1)Conference paper
Recent developments on the impacts of Large Igneous Provinces on climate changes and extinction rates emphasize the fundamental role of country rocks in gas emissions. Contact metamorphism of country rocks intruded by sills and dikes of mafic melts can be particularly important due to their long exposure to high temperatures. When the host...
Uploaded on: October 11, 2023 -
May 2, 2010 (v1)Conference paper
Recent developments on the impacts of Large Igneous Provinces on climate changes and extinction rates emphasize the fundamental role of country rocks in gas emissions. Contact metamorphism of country rocks intruded by sills and dikes of mafic melts can be particularly important due to their long exposure to high temperatures. When the host...
Uploaded on: December 2, 2022 -
January 3, 2020 (v1)Journal article
We present a full field framework based on the level‐set (LS) approach, which enables to simulate grain growth in a multiphase material. Our formalism permits to take into account different types of second phases, which can be static or dynamic (i.e. evolving also by grain growth) and reproduce both transient (evolving relative grain sizes) and...
Uploaded on: December 4, 2022 -
2021 (v1)Journal article
SUMMARY We investigate the effect of solute drag on the grain growth (GG) kinetics in olivine-rich rocks through full field and mean field modelling. Considering a drag force exerted by impurities on grain boundary migration allows reconciling laboratory and natural constraints on olivine GG kinetics. Solute drag is implemented in a full field...
Uploaded on: December 4, 2022 -
January 2021 (v1)Journal article
In recent years, several studies have shown the importance of thermal fracturing of rocks due to temperature variations, on The Earth and Mars. Rock thermal cracking might also be a process at play on the lunar surface. These temperature variations as well as change rates can reach important amplitude on bodies without an atmosphere, in...
Uploaded on: December 4, 2022 -
December 9, 2019 (v1)Publication
Because olivine is the major constituent of upper mantle rocks, its mechanical properties and microstructural evolutions play an important role in the lithosphere rheology. In this study, we investigate the deformation of olivine polycrystals through a numerical framework coupling the crystal plasticity and the finite element method (CPFEM)....
Uploaded on: December 4, 2022