Search Results - "JACOB, Damien"
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Mineralogy and petrology of Stardust particles encased in the bulb of track 80: TEM investigation of the Wild 2 fine-grained material
Published in Geochimica et cosmochimica acta (15-06-2012)“…We have characterized by transmission electron microscopy the mineralogy of samples extracted from the walls of the Stardust track 80. More than 500 fragments…”
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Structure refinement using precession electron diffraction tomography and dynamical diffraction: tests on experimental data
Published in Acta crystallographica Section B, Structural science, crystal engineering and materials (01-12-2015)“…The recently published method for the structure refinement from three‐dimensional precession electron diffraction data using dynamical diffraction theory…”
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Mineralogy and Petrology of Comet 81P/Wild 2 Nucleus Samples
Published in Science (American Association for the Advancement of Science) (15-12-2006)“…The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of…”
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Magnetic microstructures of metal grains in equilibrated ordinary chondrites and implications for paleomagnetism of meteorites
Published in Earth and planetary science letters (15-06-2011)“…Meteorites are a primary source of information about past magnetic field in the solar system. Yet, the small-scale magnetic properties of FeNi metals, which…”
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Fe-Mg interdiffusion profiles in rimmed forsterite grains in the Allende matrix: Time-temperature constraints for the parent body metamorphism
Published in Meteoritics & planetary science (01-09-2015)“…The Allende matrix is dominated by micron‐sized lath‐shaped fayalitic olivine grains with a narrow compositional range (Fa40–50). Fayalitic olivines also occur…”
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Linking Cause and Effect: Nanoscale Vibrational Spectroscopy of Space Weathering from Asteroid Ryugu
Published in Astrophysical journal. Letters (01-03-2024)“…Airless bodies are subjected to space-weathering effects that modify the first few microns of their surface. Therefore, understanding their impact on the…”
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STEM-EELS Investigation of Planar Defects in Olivine in the Allende Meteorite
Published in Minerals (Basel) (01-01-2021)“…The present study focuses on a detailed structural investigation at atomic scale of the planar defects that appear in the olivine grains in the Allende…”
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Deformation of Polycrystalline MgO Up to 8.3 GPa and 1270 K: Microstructures, Dominant Slip-Systems, and Transition to Grain Boundary Sliding
Published in Frontiers in earth science (Lausanne) (09-05-2022)“…Ferropericlase is the second most abundant mineral in the Earth’s lower mantle and its mechanical properties have a strong influence on the rheology of this…”
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Oxidation state of iron and extensive redistribution of sulfur in thermally modified Stardust particles
Published in Geochimica et cosmochimica acta (01-02-2009)“…Two representative thermally modified Stardust samples were investigated by analytical transmission electron microscopy in order to decipher their iron…”
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Iron valence state of fine-grained material from the Jupiter family comet 81P/Wild 2 – A coordinated TEM/STEM EDS/STXM study
Published in Geochimica et cosmochimica acta (01-12-2013)“…The oxidation state of transition metal elements is an indicator of the environmental conditions during formation and history of extraterrestrial materials. We…”
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Pyroxenes microstructure in comet 81P/Wild 2 terminal Stardust particles
Published in Meteoritics & planetary science (01-10-2009)“…— We report the examination by transmission electron microscopy (TEM) of four Stardust terminal particles extracted from two neighboring tracks (32 an 69). The…”
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Fine-grained material encased in microtracks of Stardust samples
Published in Meteoritics & planetary science (01-09-2013)“…Dust from comet 81P/Wild 2 was captured at high speed in silica aerogel collectors during the Stardust mission. Studies of deceleration tracks in aerogel…”
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Nonequilibrium spherulitic magnetite in the Ryugu samples
Published in Geochimica et cosmochimica acta (01-04-2023)“…We have investigated several particles collected during each of two touchdowns of the Hayabusa2 spacecraft at the surface of the C-type asteroid 162173 Ryugu…”
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In Situ Fe and S isotope analyses in pyrite from the 3.2 Ga Mendon Formation (Barberton Greenstone Belt, South Africa): Evidence for early microbial iron reduction
Published in Geobiology (01-05-2020)“…On the basis of phylogenetic studies and laboratory cultures, it has been proposed that the ability of microbes to metabolize iron has emerged prior to the…”
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A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu
Published in Nature astronomy (01-02-2023)“…Without a protective atmosphere, space-exposed surfaces of airless Solar System bodies gradually experience an alteration in composition, structure and optical…”
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Mineralogy and petrology of fine‐grained samples recovered from the asteroid (162173) Ryugu
Published in Meteoritics & planetary science (01-08-2024)“…Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI…”
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Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil
Published in Meteoritics & planetary science (01-08-2024)“…Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They…”
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Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu
Published in Meteoritics & planetary science (26-09-2024)“…The surface morphology of regolith grains from the C‐type asteroid Ryugu was studied in search of evidence of impact events on the asteroid. Scanning electron…”
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Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro‐ to nano‐scale
Published in Meteoritics & planetary science (01-08-2024)“…Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and…”
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Incipient space weathering on asteroid 162173 Ryugu recorded by pyrrhotite
Published in Meteoritics & planetary science (01-08-2024)“…Regolith samples returned from asteroid 162173 Ryugu by the Hayabusa2 mission provide direct means to study how space weathering operates on the surfaces of…”
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