A5102783403- Astro and Planetary Science
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Astronomical and nuclear sciences
- Nuclear Physics and Applications
- Geology and Paleoclimatology Research
- Metallurgical Processes and Thermodynamics
- Advanced Materials Characterization Techniques
- Quasicrystal Structures and Properties
- Stellar, planetary, and galactic studies
- Cellular Automata and Applications
- Ancient Near East History
- Spacecraft and Cryogenic Technologies
- Nuclear physics research studies
- Superconducting Materials and Applications
- Analytical chemistry methods development
- Pleistocene-Era Hominins and Archaeology
- Space Exploration and Technology
- Cryospheric studies and observations
- Mass Spectrometry Techniques and Applications
Freie Universität Berlin
2021-2023
University of Bristol
2022-2023
Institut de physique du globe de Paris
2019-2022
Centre National de la Recherche Scientifique
2019-2022
Université Paris Cité
2019-2022
University of Science and Technology of China
2019
Sorbonne Paris Cité
2019
Sorbonne Université
2019
Abstract Angrite meteorites are some of the oldest materials in solar system. They provide important information on earliest evolution system and accretion timescales protoplanets. Here, we show that 54 Cr/ 52 Cr ratio is homogeneously distributed among angrite within 13 parts per million, indicating precursor must have experienced a global-scale melting such as magma ocean. The 53 Mn/Cr ratios correlated, which evidence for an initial Mn/ 55 Mn (3.16 ± 0.11) × 10 −6 . When anchored to...
Abstract We report on the mass-independent Cr isotope compositions of 11 main group ureilites and an ureilitic trachyandesite (ALM-A). The 54 Cr/ 52 ratios for vary from −1.06 ± 0.04 to −0.78 0.05 averaged at −0.91 0.15 (2SD, N = 18) including data literature. argue that this variation reflects primitive mantle heterogeneities within ureilite parent body (UPB). As such, did not experience a global-scale magma ocean, which is consistent with heterogeneous O in ureilites. Furthermore, ε...
Abstract Chondrules are the main components of primitive meteorites and possibly building blocks planetary embryos terrestrial planets. However, their ages modes formation still highly debated. Here, we present high-precision Cr isotope data nine chondrules from one more chondrites, CO3 chondrite Ornans. These define an external 53 Mn– isochron, with initial Mn/ 55 Mn (7.1 ± 1.6) × 10 −6 , corresponding to age 4567.6 1.3 Ma when anchored angrite D’Orbigny (U-corrected). This is within error...
Abstract Chondrules are major components of chondrites and believed to drive the accretion planetary embryos. As such, constraining timing origin chondrules is central for understanding early evolution solar system formation planets. Enstatite (ECs) have isotope compositions multiple elements that match Earth and, thus, considered be good analogs precursor material from which formed. Here, we report first high-precision mass-independent Cr data nine in one least-altered EH chondrites, Sahara...
ABSTRACT Erg Chech (EC) 002 is a meteorite with andesitic composition, potentially recording the lava crystallization and crust formation of its parent body. Nucleosynthetic Cr isotope composition (ε54Cr = −0.35 ± 0.06) for EC suggests non-carbonaceous region Solar system, possibly represents crustal brachinite The 53Mn-to-53Cr decay system shows it crystallized at 4566.6 0.6 Ma, i.e. 0.7 Ma after (only considering cogenetic matrix fractions similar ε54Cr values). This age earliest recorded...
Abstract We report the first Ni and Cr stable isotope data for ureilite meteorites that are mantle residue of a carbon‐rich differentiated planet. Ureilites have similar compositions as chondrites, suggesting core‐mantle differentiation parent body (UPB) did not fractionate isotopes. Since size Earth is potentially larger than UPB; with diameter >690 km), resulting in higher temperatures at boundary Earth, it can be predicted terrestrial core formation may directly cause fractionation. On...
The terrestrial planets endured a phase of bombardment following their accretion, but the nature this late accreted material is debated, preventing full understanding origin inner solar system volatiles. We report discovery nucleosynthetic chromium isotope variability (μ 54 Cr) in Martian meteorites that represent mantle-derived magmas intruded crust. μ Cr variability, ranging from −33.1 ± 5.4 to +6.8 1.5 parts per million, correlates with magma chemistry such samples having assimilated...
Nickel is a siderophile and near-refractory element, making its isotopes potential tool for tracing planetary accretion differentiation.However, the origin of Ni stable isotope difference between bulk silicate Earth (BSE) chondrites remains enigmatic.To address this problem, we report high precision data enstatite achondrites that possess similar mass independent O compositions like Earth-Moon system.Bulk have δ 60/58 values 0.24 ± 0.08 ‰ (2 s.d., n = 13).Enstatite achondrites, including...
Abstract We investigated the stable isotope fractionation of chromium (Cr) for a panorama chondrites, including EH and EL enstatite chondrites their chondrules different phases (by acid leaching). observed that have heterogeneous δ 53 Cr values (per mil deviation Cr/ 52 from NIST SRM 979 standard), which we suggest reflect physical conditions in chondrite accretion regions. Chondrules primitive EH3 (SAH 97096) possess isotopically heavier relative to host bulk chondrite, may be caused by...
Abstract We employed MC‐ICP‐MS to measure the mass‐dependent Ca isotope compositions of Vesta‐related meteorites. Eucrites and diogenites show distinct compositions, which is caused by crystallization isotopically heavy orthopyroxene. The data support a model where two lithologies are linked, diogenites, mainly composed orthopyroxene crystallized from an eucritic melt. As normal eucrites main reservoir on Vesta, their δ 44/40 values (per mil 44 Ca/ 40 ratios relative NIST 915a) best...
Abstract A comprehensive study of an ungrouped achondrite meteorite, North West Africa (NWA) 11562, was conducted, involving petrology, mineralogy, and mass-independent chromium isotopic composition. NWA 11562 comprises 34.9 vol% olivine, 56.1 pyroxenes, 6.7 Fe–Ni metal oxides, 2.2 carbon, 0.2 anhydrite. The oxygen composition ( δ 18 O = 6.24‰ ± 0.13‰ Δ 17 −1.81‰ 0.03‰; Meteoritical Bulletin Database) compositions ε 54 Cr −0.82 0.10, 2SE) are consistent with being a ureilite, petrographic...
Chondrites are undifferentiated meteorites that can provide information on the compositions of materials in early solar System, including building blocks terrestrial planets. While most chondrites belong to well-defined groups based their mineralogy and chemical composition, a minor fraction have unusual characteristics classified as ungrouped chondrites. These reflect diversity chondritic system; however, they not well studied grouped origins poorly understood. In this study, we present...
Mass-independent chromium (Cr) isotope ratios measurements have been widely used in dating early solar system events and tracing the genetic relationships between different system, as well terrestrial materials.Current analytical techniques need relatively large sample sizes, this limits application of Cr isotopes on precious mission return samples some Cr-poor (e.g., BCR-2 with contents ~15 ppm).This paper reports a novel method for mass-independent isotopic using Thermal Ionization Mass...