Results 21 to 30 of about 8,403 (204)
Igneous Rim Accretion on Chondrules in Low-velocity Shock Waves
The Astrophysical Journal, 2023 Shock-wave heating is a leading candidate for the mechanisms of chondrule formation. This mechanism forms chondrules when the shock velocity is in a certain range.
Yuji Matsumoto, Sota Arakawa
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Bubbles to Chondrites-II. Chemical fractionations in chondrites
Progress in Earth and Planetary Science, 2021 We attempt to develop a possible theory of chemical fractionations in chondrites, that is consistent with various features of chondritic components and current observation of protoplanetary disks (PPD).
Akihiko Hashimoto, Yuki Nakano
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Meteoritics and Planetary Science, 2020 Mineralogically zoned chondrules are a common chondrule type in chondrites. They consist of olivine cores, surrounded by low‐Ca pyroxene rims. By serial sectioning porphyritic chondrules from carbonaceous, ordinary, and enstatite chondrites, we ...
J. Barosch +4 more
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Geophysical Research Letters, 2023 We employed MC‐ICP‐MS to measure the mass‐dependent Ca isotope compositions of Vesta‐related meteorites. Eucrites and diogenites show distinct Ca isotope compositions, which is caused by crystallization of isotopically heavy orthopyroxene. The Ca isotope
Ke Zhu +5 more
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The Planetary Science Journal, 2023 Converging lines of evidence show that protoplanetary disks are complex environments hosting spatial and temporal variability at multiple scales.
Roger R. Fu +5 more
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Mechanical Modification of Chondrule Fine-grained Rims by Dusty Nebular Shocks
The Planetary Science Journal, 2023 The mechanical processes that convert an initially fluffy chondrule fine-grained rim (FGR) into a more compact structure remain poorly characterized.
Augusto Carballido +3 more
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Chondrules as direct thermochemical sensors of solar protoplanetary disk gas
Science Advances, 2018 Cathodoluminescence reveals structures indicative of gas-assisted epitaxial growth during chondrule melt crystallization. Chondrules, millimeter-sized igneous spherules comprising the major component of most chondritic meteorites, formed during the first
G. Libourel, M. Portail
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An Almahata Sitta EL3 fragment: implications for the complex thermal history of enstatite chondrites
Progress in Earth and Planetary Science, 2021 Almahata Sitta is a polymict breccia, consisting of many kinds of clasts. Here we present our mineralogical and petrological results on an EL3 fragment, MS-177 from Almahata Sitta.
M. Kimura +4 more
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Mixing and Transport of Dust in the Early Solar Nebula as Inferred from Titanium Isotope Variations among Chondrules [PDF]
, 2017 Chondrules formed by the melting of dust aggregates in the solar protoplanetary disk and as such provide unique insights into how solid material was transported and mixed within the disk.
S. Gerber +4 more
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Protracted Timescales for Nebular Processing of First-formed Solids in the Solar System
The Astrophysical Journal, 2023 The calcium–aluminum-rich inclusions (CAIs) from chondritic meteorites are the first solids formed in the solar system. Rim formation around CAIs marks a time period in early solar system history when CAIs existed as free-floating objects and had not yet
Prajkta Mane +3 more
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