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Philippe Gillet

Cette personne a quitté l’EPFL

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Publications associées (37)

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A large planetary body inferred from diamond inclusions in a ureilite meteorite

Cécile Hébert, Emad Oveisi, Marco Cantoni, Philippe Gillet, James Badro, Farhang Nabiei, Teresa Katharina Dennenwaldt

Planetary formation models show that terrestrial planets are formed by the accretion of tens of Moon-to Mars-sized planetary embryos through energetic giant impacts. However, relics of these large proto-planets are yet to be found. Ureilites are one of the ...

Nature Research2018

Phase transition processes of olivine in the shocked Martian meteorite Tissint: Clues to origin of ringwoodite-, bridgmanite- and magnesiowilstite-bearing assemblages

Philippe Gillet

Tissint is a heavily shocked olivine-phyric shergottite. We investigated and documented several phase transformations and dissociation phenomena of olivine adjacent to and in many shock-induced melt-pockets of Tissint. Olivine grains entrained in the melt- ...

Elsevier2016

Evidence from Tm anomalies for non-CI refractory lithophile element proportions in terrestrial planets and achondrites

Philippe Gillet

Thulium is a heavy rare earth element (REE) whose geochemical behavior is intermediate between Er and Yb, and that is not expected to be decoupled from these elements during accretion of planetary bodies and geological processes. However, irregularities in ...

Pergamon-Elsevier Science Ltd2016

Composition dependence of spin transition in (Mg,Fe)SiO3 bridgmanite

Philippe Gillet, James Badro, Susannah McGregor Dorfman

Spin transitions in (Mg,Fe)SiO3 bridgmanite have important implications for the chemistry and dynamics of Earth's lower mantle, but have been complex to characterize in experiments. We examine the spin state of Fe in highly Fe-enriched bridgmanite synthesi ...

Mineralogical Society of America2015

The structure of the asteroid 4 Vesta as revealed by models of planet-scale collisions

Philippe Gillet

Asteroid 4 Vesta seems to be a major intact protoplanet, with a surface composition similar to that of the HED (howardite-eucrite-diogenite) meteorites(1-4). The southern hemisphere is dominated by a giant impact scar(5), but previous impact models(6-8) ha ...

Nature Publishing Group2013

Shock Events in the Solar System: The Message from Minerals in Terrestrial Planets and Asteroids

Philippe Gillet

Impacts are central to the origin and evolution of planets of the Solar System. The shapes of craters, which can reach up to 1,000 km in diameter on the Moon, provide critical information on the large-scale dynamics of the impact and related shock. Mineral ...

Annual Reviews2013

Spin and valence dependence of iron partitioning in Earth's deep mantle

Philippe Gillet, Cécile Hébert, Marco Cantoni, James Badro, Farhang Nabiei, Hélène Marie Piet, Teresa Katharina Dennenwaldt

We performed laser-heated diamond anvil cell experiments combined with state-of-the-art electron microanalysis (focused ion beam and aberration-corrected transmission electron microscopy) to study the distribution and valence of iron in Earth's lower mantl ...

National Academy of Sciences2016

Survival of Heterogeneous Stress Distributions Created by Precursory Slip at Frictional Interfaces

Jean-François Molinari, Philippe Gillet, David Simon Kammer, Mathilde Edmée Lucette Radiguet de la Bastaie

We study the dynamics of successive slip events at a frictional interface with finite-element simulations. Because of the viscous properties of the material, the stress concentrations created by the arrest of precursory slip are not erased by the propagati ...

American Physical Society2013

The Unique Differentiated Meteorite Nwa7325: Highly Reduced, Stark Affinities To E-Chondrites And Unknown Parental Planet

Philippe Gillet

Wiley-Blackwell2014

Effect of salt on the H-bond symmetrization in ice

Philippe Gillet, Richard Gaal, Livia Eleonora Bove Kado

The richness of the phase diagram of water reduces drastically at very high pressures where only two molecular phases, proton-disordered ice VII and proton-ordered ice VIII, are known. Both phases transform to the centered hydrogen bond atomic phase ice X ...

National Academy of Sciences2015

Monoclinic Baddeleyite In Shergotty: Tem Evidence Of Orthogonal Domains Induced By Phase Transformation From A Dense Polymorph And Not By Igneous Origin

Philippe Gillet

Wiley-Blackwell2014

A deep crust-mantle boundary in the asteroid 4 Vesta

Philippe Gillet, Harold Gabriel Eugène Justin Clenet

The asteroid 4 Vesta was recently found to have two large impact craters near its south pole, exposing subsurface material. Modelling suggested that surface material in the northern hemisphere of Vesta came from a depth of about 20 kilometres, whereas the ...

Nature Publishing Group2014

Underground Organic-Rich Fluids On Mars: Biotic Vs Abiotic Processes

Yu Lin, Philippe Gillet, Jiangyan Yang

Wiley-Blackwell2013

H And C Isotopes Of C-Grains From Martian Meteorite Nwa 6162

Yu Lin, Philippe Gillet

Wiley-Blackwell2015

Metal Nodules In El3 And Eh3 Primitive Chondrites: Conglomerates Of Micro Pebble Metals With A Menagerie Of Sulfide Assemblages; Graphite Feathers And Various Sinoite Morphologies, Metal Clasts. No Evidence For Melting

Yu Lin, Philippe Gillet

Wiley-Blackwell2016

Nano-XRF study of earliest solar condensates in EL-3 fragments from the Almahata Sitta TC3 asteroid

Philippe Gillet

Wiley-Blackwell2014

Dual energy nano-XRF quantification in EL-3 fragments of the Almahata Sitta TC3 asteroid

Philippe Gillet

Wiley-Blackwell2015