Results 11 to 20 of about 431 (178)
Method Development for the Analysis of Carbonaceous Chondrites by Laser Desorption/Ionization and Secondary Ion Time-of-Flight Mass Spectrometry. [PDF]
J Mass SpectromABSTRACT This study focuses on the development of a laser desorption/ionization mass spectrometric method for analyzing carbonaceous chondrites, meteorites that may hold clues to the origin of life. Since carbonaceous chondrites are only available in small quantities, we initially designed an artificial meteorite material (the mineral forsterite) doped
Rados E, Frank J, Pittenauer E.
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Bubbles to Chondrites-I. Evaporation and condensation experiments, and formation of chondrules
Progress in Earth and Planetary Science, 2020 We propose a simple model of chondrule formation that is supported by our new experiments. With a laser-heating and inert-gas-cooling technique, we obtained evaporation and condensation pathways starting with chondritic compositions till ends, and ...
Yuki Nakano, Akihiko Hashimoto
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A Chondrule in the Chainpur Meteorite [PDF]
Science, 1965 The occurrence of glass as a major constituent in a chondrule from the Chainpur meteorite provides evidence that the chondrules formed by rapid cooling of liquid droplets. The virtual absence of nickel in the silicates suggests that it segregated into the metal phase in the molten stage, prior to crystallization of the silicates.
K, Fredriksson, A M, Reid
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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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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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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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Chondrules in Enstatite Chondrites [PDF]
, 2018 23 pages, 4 figures. Submitted manuscript for a chapter in the book "Chondrules and the protoplanetary disc" (editors : S. Russell, H. C. Connolly Jr, A. N. Krot) to be published by Cambridge University Press in 2018. This version is free to view and download for personal use only.
Jacquet, Emmanuel +2 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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