A5035294892- Geological and Geochemical Analysis
- Astro and Planetary Science
- Geology and Paleoclimatology Research
- High-pressure geophysics and materials
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Geologic Mapping
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Astrophysics and Star Formation Studies
- Geochemistry and Elemental Analysis
- Stellar, planetary, and galactic studies
- Geological and Geophysical Studies
- Geological Modeling and Analysis
- Geological and Tectonic Studies in Latin America
- Nuclear Physics and Applications
- Molecular Spectroscopy and Structure
- Global Energy and Sustainability Research
- Geomagnetism and Paleomagnetism Studies
- Oceanographic and Atmospheric Processes
- Extraction and Separation Processes
University of Manchester
2015-2025
Woods Hole Oceanographic Institution
2023-2025
Centre National de la Recherche Scientifique
2018-2024
Centre de Recherches Pétrographiques et Géochimiques
2017-2024
Université de Lorraine
2018-2024
The University of Tokyo
2015-2018
Volatile elements (water, carbon, nitrogen, sulfur, halogens, and noble gases) played an essential role in the secular evolution of solid Earth emergence life. Here we provide overview Earth's volatile inventories describe mechanisms by which volatiles are conveyed between surface mantle reservoirs, via subduction volcanism. Using literature data, compute concentration flux estimates for major reservoirs internally balanced assessment modern global recycling. a nitrogen isotope box model,...
The near-Earth carbonaceous asteroid (162173) Ryugu is expected to contain volatile chemical species that could provide information on the origin of Earth's volatiles. Samples were retrieved by Hayabusa2 spacecraft. We measured noble gas and nitrogen isotopes in samples found they are dominated presolar primordial components, incorporated during Solar System formation. Noble concentrations higher than those Ivuna-type (CI) chondrite meteorites. Several host phases isotopically distinct have...
Identifying the origin of noble gases in Earth's mantle can provide crucial constraints on source and timing volatile (C, N, H2O, gases, etc.) delivery to Earth. It remains unclear whether early Earth was able directly capture retain volatiles throughout accretion or it accreted anhydrously subsequently acquired through later additions chondritic material. Here, we report high-precision gas isotopic data from volcanic emanating from, around, Yellowstone caldera (Wyoming, United States). We...
The terrestrial carbon to nitrogen ratio is a key geochemical parameter that can provide information on the nature of Earth's precursors, accretion/differentiation processes our planet, as well volatile budget Earth. In principle, this be determined from analysis elements trapped in mantle-derived rocks like mid-ocean ridge basalts (MORB), corrected for fractional degassing during eruption. However, correction critical and previous attempts have adopted different approaches which led...
Fluids trapped in inclusions well-characterized Archaean hydrothermal quartz crystals were analyzed by the extended argon–argon method, which permits simultaneous measurement of chlorine and potassium concentrations. Argon nitrogen isotopic compositions fluids also determined static mass spectrometry. extracted stepwise crushing samples from North Pole (NW Australia) Barberton (South Africa) 3.5–3.0-Ga-old greenstone belts. The data indicate that are a mixture low salinity end-member,...
The age of iron meteorites implies that accretion protoplanets began during the first millions years solar system. Due to heat generated by 26Al decay, many early were fully differentiated with an igneous crust produced cooling a magma ocean and segregation at depth metallic core. formation nature primordial stages melting is poorly understood, due in part scarcity available samples. newly discovered meteorite Erg Chech 002 (EC 002) originates from one such primitive has andesite bulk...
Comets contain abundant amounts of organic and inorganic species. Many the volatile molecules in comets have also been observed interstellar medium some them even with similar relative abundances, indicating formation under conditions or sharing a common chemical pathway. There is growing amount evidence that suggests inherit preserve substantial fractions materials inherited from previous evolutionary phases, potentially commonplace processes occurred throughout comet-forming regions....
Mantle-derived noble gases in volcanic are powerful tracers of terrestrial volatile evolution, as they contain mixtures both primordial (from Earth’s accretion) and secondary (e.g., radiogenic) isotope signals that characterize the composition deep Earth. However, emitted through subaerial hydrothermal systems also contributions from shallow reservoirs (groundwater, crust, atmosphere). Deconvolving source is critical for robust interpretations mantle-derived signals. Here, we use a novel...
Abstract The nitrogen isotope compositions of two samples returned from the asteroid Ryugu were determined using a stepwise combustion method, along with Ivuna (CI) and Y‐980115, CI‐like Antarctic meteorite, as references. A0105‐07 C0106‐07 showed bulk δ 15 N values +1.7 ± 0.5‰ +0.2 0.6‰, respectively, significantly lower than +36.4 0.4‰, but close to Y‐980115 +4.0 0.3‰. are further characterized by C/N 36 Ar/N ratios up 3.4× 4.9× value Ivuna, respectively. Among all CI chondrites, positive...
Clues to unraveling the origin and history of terrestrial volatiles lie in noble gas record Earth's mantle. However, low abundance heavy gases (Ar-Kr-Xe) mantle-derived rocks presents a major analytical challenge that limits our understanding mantle volatile evolution. Here, we employ new technique ultrahigh precision dynamic mass spectrometry measure Ar-Kr-Xe isotopes collected from Mt. Etna (Italy) Eifel (Germany), which both tap depleted convecting reservoirs. We find fractions primordial...
The noble gas isotope composition of the mantle can provide unique insights into origin and evolution volatile elements on Earth. Xenon isotopes combine primordial signatures with contributions from extinct extant radionuclides, therefore offering potential to set constraints both nature Earth's planetary precursor(s) timing their contributions. However, measuring Xe mantle-derived samples sufficiently high-precision has proven difficult due (i) large occurrence a modern-like atmospheric...
Abstract The origin of terrestrial volatiles remains one the most puzzling questions in planetary sciences. timing and composition chondritic cometary deliveries to Earth has remained enigmatic due paucity reliable measurements material. This work uses recently measured volatile elemental ratios noble gas isotope data from comet 67P/Churyumov-Gerasimenko (67P/C-G), combination with literature, reconstruct Earth’s ancient atmosphere. Comets are found have contributed ~20% atmospheric heavy...
The Hayabusa2 spacecraft returned to Earth from the asteroid 162173 Ryugu on 6 December 2020. One day after recovery, gas species retained in sample container were extracted and measured on-site stored collection bottles. consists of helium neon with an extraterrestrial 3 He/ 4 He 20 Ne/ 22 Ne ratios, along some contaminant terrestrial atmospheric gases. A mixture solar Earth’s is best explanation for composition. Fragmentation grains within discussed basis estimated amount indigenous size...
Carbonaceous chondrites are considered to have originated from C-type asteroids and represent some of the most primitive material in our solar system. Furthermore, since carbonaceous can contain significant quantities volatile elements, they may played a crucial role supplying volatiles organic Earth other inner system bodies. However, major challenge unravelling composition chondritic meteorites is distinguishing between which features were inherited parent body, what be secondary feature...
Nitrogen plays a critical role in maintaining Earth's hospitable surface environment over geological time. Despite our atmosphere being dominated by nitrogen, understanding of how nitrogen was delivered to Earth and subsequent planetary processes modified budget through time is currently lacking. Here, we report measurements isotopologues N2 (Δ30), along with ultrahigh precision Ar, Kr, Xe isotopes, hydrothermal gas samples from Yellowstone National Park. We show that δ15N variations are...
Noble gases are chemically inert and, as such, act unique tracers of physical processes over geological timescales.The isotopic composition atmospheric xenon, the heaviest stable noble gas, evolved following mass-dependent fractionation throughout Hadean and Archaean aeons.This evolution appears to have ceased between 2.5 2.1 Ga, around time Great Oxidation Event (GOE).The coincidental halting Xe may provide further insights into mechanisms affecting atmosphere at Archaean-Proterozoic...
Abundant ancient air in Archean kerogen reveals temporal atmospheric Xe evolution, providing a dating tool for early organics.