Olivier Beyssac
A5041029530- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Astro and Planetary Science
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Space Exploration and Technology
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Laser-induced spectroscopy and plasma
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Geological and Geophysical Studies Worldwide
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Space Science and Extraterrestrial Life
- Spectroscopy Techniques in Biomedical and Chemical Research
- Clay minerals and soil interactions
- Geological formations and processes
- Diamond and Carbon-based Materials Research
- Geological Studies and Exploration
- Landslides and related hazards
- Geochemistry and Elemental Analysis
- Mineral Processing and Grinding
- Graphite, nuclear technology, radiation studies
Institut de minéralogie, de physique des matériaux et de cosmochimie
2016-2025
Sorbonne Université
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Marie Curie
2022-2025
Institut de Recherche pour le Développement
2013-2024
Laboratoire de Minéralogie & Cosmochimie du Muséum
2019-2023
Norwegian Geological Survey
2022
University of Oslo
2022
Austrian Academy of Sciences
2022
Laboratoire de Physique de l'ENS
2007-2021
Abstract Metasedimentary rocks generally contain carbonaceous material (CM) deriving from the evolution of organic matter originally present in host sedimentary rock. During metamorphic processes, this is progressively transformed into graphite s.s. and degree organisation CM known as a reliable indicator grade. In study, was systematically characterised by Raman microspectroscopy across several Mesozoic Cenozoic reference belts. This organisation, including within‐sample heterogeneity,...
Terra Nova, 22, 354–360, 2010 Abstract The Raman spectrum of carbonaceous material (CM) from advanced diagenesis (∼200 °C) to low-grade metamorphism (∼320 is documented in the Helvetic flysch Glarus Alps (Switzerland). complex, with several defect bands at ∼1200 (D4), ∼1350 (D1), ∼1500 (D3) and ∼1620 (D2) cm−1. We document evolution these relative 'graphite' G band increasing metamorphic grade, we show that this qualitative may be used as a proxy for temperature Alps. develop robust...
Research Article| December 01, 2014 From Organic Matter to Graphite: Graphitization Peter R. Buseck; Buseck 1School of Earth and Space Exploration & Department Chemistry Biochemistry, Arizona State University, Tempe, AZ 85282, USAE-mail: pbuseck@asu.edu Search for other works by this author on: GSW Google Scholar Olivier Beyssac 2Institut de Minéralogie, Physique des Matériaux, et Cosmochimie (IMPMC), Sorbonne Universités - UPMC Université, Paris 06, UMR CNRS 7590 Muséum National d'Histoire,...
Abstract On the NASA 2020 rover mission to Jezero crater, remote determination of texture, mineralogy and chemistry rocks is essential quickly thoroughly characterize an area optimize selection samples for return Earth. As part Perseverance payload, SuperCam a suite five techniques that provide critical complementary observations via Laser-Induced Breakdown Spectroscopy (LIBS), Time-Resolved Raman Luminescence (TRR/L), visible near-infrared spectroscopy (VISIR), high-resolution color imaging...
The glacial way of wearing away rate at which glaciers erode landscapes is an important but poorly constrained relationship. Herman et al. tackle this issue by considering the Franz Josef alpine glacier in New Zealand. amount sediment piling up edge provided erosion rates, whereas remote sensing allowed for simultaneous tracking motion. result was a nonlinear relationship, suggesting that fast are much more effective gouging landscapes. This could explain paradox why long-term rates so lower...
Perseverance images of a delta on Mars The rover landed in Jezero crater, Mars, February 2021. Earlier orbital showed that the crater contains an ancient river was deposited by water flowing into lake billions years ago. Mangold et al . analyzed taken shortly after landing show distant cliff faces at edge delta. exposed stratigraphy and sizes boulders allowed them to determine past level discharge rates. An initially steady flow transitioned intermittent floods as planet dried out. This...
The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below crater's sedimentary delta, finding that floor consists igneous rocks altered by water. lowest exposed unit, informally named Séítah, is a coarsely crystalline olivine-rich rock, which accumulated at base magma body. Magnesium-iron carbonates along grain boundaries indicate reactions with carbon dioxide-rich water under water-poor conditions....
The Perseverance rover landed in Jezero crater, Mars, February 2021. We used the Scanning Habitable Environments with Raman and Luminescence for Organics Chemicals (SHERLOC) instrument to perform deep-ultraviolet fluorescence spectroscopy of three rocks within crater. identify evidence two distinct ancient aqueous environments at different times. Reactions liquid water formed carbonates an olivine-rich igneous rock. A sulfate-perchlorate mixture is present rocks, which probably by later...
Before Perseverance, Jezero crater's floor was variably hypothesized to have a lacustrine, lava, volcanic airfall, or aeolian origin. SuperCam observations in the first 286 Mars days on revealed and intrusive terrain with compositional density stratification. The dominant lithology along traverse is basaltic, plagioclase enrichment stratigraphically higher locations. Stratigraphically lower, layered rocks are richer normative pyroxene. lowest observed unit has highest inferred olivine-rich...
The geological units on the floor of Jezero crater, Mars, are part a wider regional stratigraphy olivine-rich rocks, which extends well beyond crater. We investigated petrology olivine and carbonate-bearing rocks Séítah formation in Jezero. Using multispectral images x-ray fluorescence data, acquired by Perseverance rover, we performed petrographic analysis Bastide Brac outcrops within this unit. found that these composed igneous rock, moderately altered aqueous fluid. mainly made...
Abstract The first samples collected by the Mars 2020 mission represent units exposed on Jezero Crater floor, from potentially oldest Séítah formation outcrops to youngest rocks of heavily cratered Máaz formation. Surface investigations reveal landscape‐to‐microscopic textural, mineralogical, and geochemical evidence for igneous lithologies, some possibly emplaced as lava flows. contain major rock‐forming minerals such pyroxene, olivine, feldspar, accessory including oxides phosphates,...
Abstract Sedimentary fans are key targets of exploration on Mars because they record the history surface aqueous activity and habitability. The sedimentary fan extending from Neretva Vallis breach Jezero crater's western rim is one 2020 Perseverance rover's main targets. spent ∼250 sols exploring collecting seven rock cores lower ∼25 m exposed within fan's eastern scarp, a sequence informally named “Shenandoah” formation. This study describes sedimentology stratigraphy Shenandoah formation...
At geological time scales, the role of continental erosion in organic carbon (OC) cycle is determined by balance between recent OC burial and petrogenic oxidation. Evaluating its net effect on concentration dioxide dioxygen atmosphere requires fate to be assessed. Here, we report a multiscale (nanometer micrometer) structural characterization Himalayan system. We show that graphitic preserved buried marine sediments, while less graphitized forms are oxidized during fluvial transport....
The Lesser Himalaya (LH) consists of metasedimentary rocks that have been scrapped off from the underthrusting Indian crust and accreted to mountain range over last ∼20 Myr. It now forms a significant fraction Himalayan collisional orogen. We document kinematics thermal metamorphism associated with deformation exhumation LH, combining thermometric thermochronological methods structural geology. Peak metamorphic temperatures estimated Raman spectroscopy carbonaceous material decrease...
Abstract The Western Alps are a classic subduction‐related collisional orogen with well‐preserved, deeply subducted ophiolitic remnants of oceanic lithosphere. Some (e.g. Monviso, Voltri) were recognized as palaeo‐subduction channel, tectonic blocks showing wide range pressure–temperature conditions. We herein evaluate for the first time metamorphic homogeneity extensive Zermatt‐Saas ophiolite. peak eclogitic assemblages represented by omphacite–garnet ± phengite epidote lawsonite...
The Taiwan mountain belt is composed of a Cenozoic slate (Hsuehshan Range units, HR, and Backbone Slates, BS) accreted polymetamorphic basement rocks (Tananao Complex, TC). Ongoing crustal shortening has resulted from the collision between Chinese continental margin Luzon volcanic arc, which initiated ∼6.5 Ma ago. grade age metamorphism exhumation are key record development orogenic wedge. Because mostly by sediments lacking metamorphic index minerals, quantitative constraints on sparse. By...
Research Article| March 01, 2010 Oxidation of petrogenic organic carbon in the Amazon floodplain as a source atmospheric CO2 Julien Bouchez; Bouchez 1Institut de Physique du Globe Paris, CNRS-UMR 7154, 4, place Jussieu 75252 Paris cedex 05, France2Université Diderot, 75205 13, France Search for other works by this author on: GSW Google Scholar Olivier Beyssac; Beyssac 3Laboratoire Géologie, Ecole Normale Supérieure, 8538, 24 rue Lhomond, 75231 Valier Galy; Galy 4Woods Hole Oceanographic...