A5072807363- Astro and Planetary Science
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
- Stellar, planetary, and galactic studies
- High-pressure geophysics and materials
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Space Exploration and Technology
- Geology and Paleoclimatology Research
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Methane Hydrates and Related Phenomena
- Geological Formations and Processes Exploration
- Marine and environmental studies
- Global Energy and Sustainability Research
- Distributed and Parallel Computing Systems
- Clay minerals and soil interactions
- Astrophysics and Star Formation Studies
Arizona State University
2024-2025
California Institute of Technology
2022-2023
Rice University
2018-2022
High pressure-temperature experiments suggest late delivery of life-essential elements to Earth by a large differentiated body.
The depletion of moderately volatile elements (MVEs) in terrestrial planets remains poorly understood, with explanations including partial nebular condensation and MVE loss during planetesimal differentiation or collisions. In this study, we use magmatic iron meteorites to reconstruct the inventory earliest inner [noncarbonaceous (NC)] outer [carbonaceous (CC)] Solar System planetesimals. We show that several NC CC meteorite parent bodies (IMPBs) exhibit chondrite-like abundances, indicating...
Core segregation and atmosphere formation are two of the major processes that redistribute volatile elements-hydrogen (H), carbon (C), nitrogen (N), sulfur (S)-in around rocky planets during their formation. The elements by definition accumulate in gaseous reservoirs form atmospheres. However, under conditions early planet formation, these can also behave as siderophiles (i.e., iron-loving) become concentrated core-forming metals. Current models core suggest metal-silicate reactions occurred...
Abstract The timing and mechanism by which the present-day inventory of life-essential volatiles hydrogen–carbon–nitrogen–sulfur (H–C–N–S) in bulk silicate Earth (BSE) was established are debated. In this study we have modeled equilibrium partitioning H–C–N–S between core, magma ocean (MO), atmosphere to determine whether Moon-forming impactor (MFI) primary source BSE. Our findings suggest that MFI’s core MO-degassed were its reservoirs. Since MFI likely lost before giant impact, most BSE’s...
Abstract Earth is believed to have acquired its highly siderophile element (HSE) inventory through the late accretion of ∼0.3%–0.5% mass in chondrite-like materials, following main stage growth. Late accretion, particularly if it originated from outer solar system, could significantly contributed bulk silicate Earth’s (BSE = mantle + crust hydrosphere atmosphere) carbon–nitrogen–hydrogen (C–N–H) inventory. However, recent studies, noting differences between HSE and Moon’s mantle, suggest...
Abstract Noncarbonaceous (NC; inner solar system) meteorites have lower 15 N/ 14 N ratios than carbonaceous (CC; outer meteorites. Whether this is evidence of a primordial heterogeneity reservoirs in the protosolar disk remains unclear. In study, I consider isotopic compositions meteorite (chondrite, achondrite, and iron meteorite) parent bodies as function their growth zones. Despite CC being generally higher NC meteorites, there substantial overlap between them. Late-stage mixing...
Abstract Nitrogen (N) is extremely depleted in the bulk silicate Earth (BSE). However, whether magma ocean was as N‐poor present‐day BSE unknown. We performed multi‐anvil experiments at 20 GPa and 1,673−2,073 K to determine dihedral angle of Fe−Ni−N alloy melt ringwoodite matrix investigate percolation Fe‐rich solid mantle can explain N depletion BSE. The angles ranged from 112° 137°, surpassing wetting boundary. Our suggest that removal by Earth's core unlikely. Therefore, besides loss...
Carbon-enriched rocky exoplanets have been proposed to occur around dwarf stars as well binary stars, white dwarfs, and pulsars. However, the mineralogical make up of such planets is poorly constrained. We performed high-pressure high-temperature laboratory experiments (P = 1–2 GPa, T 1523–1823 K) on chemical mixtures representative C-enriched based calculations protoplanetary disk compositions. These P-T conditions correspond deep interiors Pluto- Mars-sized upper mantles larger planets....