Results 41 to 50 of about 1,937 (173)
Meteoritics &Planetary Science, EarlyView.Abstract An unusual chondritic xenolith was found in two sequentially prepared thin sections of a sample from the Krymka (LL3.2) chondrite. The xenolith has a rounded, slightly deformed shape of about 5 mm in apparent diameter and is partially surrounded by a double rim made of an inner fine‐grained silicate‐rich rim and an outer sulfide‐rich rim.
Aelita Girich +6 more
wiley +1 more source
THE Formation of chondrule-like particles in RF discharge plasma
Physical Sciences and Technology, 2023 Chondrules are fundamental components of chondritic meteorites and play a vital role in understanding the formation of the early solar system. This study focuses on the synthesis of chondrule-like particles in a plasma environment using a radiofrequency
Assan Abdirakhmanov +8 more
doaj +1 more source
, 1983 P(論文)Textures of chondrules in the unequilibrated ordinary chondrites have been summarized on the basis of the processes of their formation inferred from the results of previous experiments.
Nagahara, Hiroko
core +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The light element distribution in planetary cores and the processes driving core evolution in rocky planets are poorly understood. Magmatic iron meteorites are samples from the cores of ancient embryonic planetesimals and therefore provide a window into the processes governing core evolution. We performed high precision oxygen isotope analyses
R. J. Windmill +4 more
wiley +1 more source
The Astrophysical JournalReproduction experiments of radial pyroxene (RP) chondrules were carried out using an Ar–H _2 or Ar gas-jet levitation system in a reducing atmosphere in order to simulate chondrule formation in the protoplanetary disk.
Kana Watanabe +2 more
doaj +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract Here we report on the microstructure and chemistry of sulfide minerals returned from asteroid (162173) Ryugu. We identify a unique sulfide population in particle A0016 composed of violarite (FeNi2S4), pyrite (FeS2), chalcopyrite (CuFeS2), pyrrhotite (Fe1‐xS), and pentlandite ([Fe,Ni]9S8).
M. C. Benner +3 more
wiley +1 more source
Chondrules and the Protoplanetary Disk [PDF]
, 2017 The purpose of the workshop is to discuss physical, chemical, and isotopic characteristics of chondrules, possible mechanisms of chondrule formation, relationships between chondrules and other chondritic components, and the relationship between chondrule
core
Anhydrous alteration of Allende chondrules in the solar nebura II: Alkali-Ca exchange reactions and formation of nepheline,sodalite and Ca-rich phases in chondrules [PDF]
, 1995 P(論文)Fifty-eight Allende chondrules were studied to investigate secondary anhydrous alteration of chondrules. Nepheline and sodalite replace anorthite-normative cryptocrystalline groundmass and plagioclase.
Kimura, Makoto, Ikeda, Yukio
core +2 more sources
Meteoritics &Planetary Science, EarlyView.Abstract Carbonaceous chondrites contain phosphorus, whose speciation and thus history remain to be investigated. Phosphorus/sulfur‐bearing assemblages have been reported in carbonaceous CM chondrites, but there is no consensus about their exact compositions and origins.
Valentine Megevand +4 more
wiley +1 more source
Abundant microchondrules in 162173 Ryugu suggest a turbulent origin for primitive asteroids
Nature CommunicationsChondrules are a characteristic feature of primitive Solar System materials and are common in all primitive meteorites except the CI-chondrites. They are thought to form owing to melting of solid dust aggregates by energetic processing within the solar ...
Matthew J. Genge +7 more
doaj +1 more source