Oxygen Isotope Exchange Between Molten Silicate Spherules and Ambient Water Vapor with Nonzero Relative Velocity: Implication for Chondrule Formation Environment
arXiv:2306.14413 · doi:10.1016/j.icarus.2023.115690
Abstract
Oxygen isotope compositions of chondrules reflect the environment of chondrule formation and its spatial and temporal variations. Here, we present a theoretical model of oxygen isotope exchange reaction between molten silicate spherules and ambient water vapor with finite relative velocity. We found a new phenomenon, that is, mass-dependent fractionation caused by isotope exchange with ambient vapor moving with nonzero relative velocity. We also discussed the plausible condition for chondrule formation from the point of view of oxygen isotope compositions. Our findings indicate that the relative velocity between chondrules and ambient vapor would be lower than several 100 m/s when chondrules crystallized.
15 pages, 8 figures. Accepted for publication in Icarus
References in corpus (13)
- Astrochemistry and compositions of planetary systems
- CO Depletion in Protoplanetary Disks: A Unified Picture Combining Physical Sequestration and Chemical Processing
- Three-dimensional Simulations of Magnetospheric Accretion in a T Tauri Star: Accretion and Wind Structures Just Around Star
- Trace element geochemistry of CR chondrite metal
- Giant protostellar flares: accretion-driven accumulation and reconnection-driven ejection of magnetic flux in protostars
- Collisions and compositional variability in chondrule-forming events
- Harvesting the decay energy of Al to drive lightning discharge in protoplanetary discs
- On beryllium-10 production in gaseous protoplanetary disks and implications on the astrophysical setting of refractory inclusions
- Chondrule destruction in nebular shocks
- Compound Chondrules fused Cold
- Compound chondrule formation in optically thin shock waves
- Revisiting Jovian-Resonance Induced Chondrule Formation
- Igneous Rim Accretion on Chondrules in Low-Velocity Shock Waves