Results 21 to 30 of about 3,808 (207)
Origin of Isotopic Diversity among Carbonaceous Chondrites
The Astrophysical Journal Letters, 2023 Carbonaceous chondrites are some of the most primitive meteorites and derive from planetesimals that formed a few million years after the beginning of the solar system.
Jan L. Hellmann +7 more
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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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Chondrule formation, metamorphism, brecciation, an important new primary chondrule group, and the classification of chondrules [PDF]
Earth and Planetary Science Letters, 1995 The recently proposed compositional classification scheme for meteoritic chondrules divides the chondrules into groups depending on the composition of their two major phases, olivine (or pyroxene) and the mesostasis, both of which are genetically important.
Derek W.G. Sears +2 more
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Barred olivine chondrules in ordinary chondrites: Constraints on chondrule formation
Meteoritics & Planetary Science, 2023 AbstractIn general, barred olivine (BO) chondrules formed from completely melted precursors. Among BO chondrules in unequilibrated ordinary chondrites, there are significant positive correlations among chondrule diameter, bar thickness, and rim thickness.
Alan E. Rubin +4 more
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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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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 Origin of Chondrules: Constraints from Matrix-Chondrule Complementarity
Earth and Planetary Sciences Letters, 2015 One of the major unresolved problems in cosmochemistry is the origin of chondrules, once molten, spherical silicate droplets with diameters of 0.2 to 2 mm. Chondrules are an essential component of primitive meteorites and perhaps of all early solar system materials including the terrestrial planets.
Palme, H, Hezel, D.C, Ebel, D.S.
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How to form planetesimals from mm-sized chondrules and chondrule aggregates [PDF]
Astronomy & Astrophysics, 2015 The size distribution of asteroids and Kuiper belt objects in the solar system is difficult to reconcile with a bottom-up formation scenario due to the observed scarcity of objects smaller than $\sim$100 km in size. Instead, planetesimals appear to form top-down, with large $100-1000$ km bodies forming from the rapid gravitational collapse of dense ...
Daniel Carrera +2 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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Chondrule transport in protoplanetary discs [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Accepted to MNRAS.
Goldberg, Aaron Z. +2 more
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