Results 31 to 40 of about 10,798 (236)
Looking for the origin of life in cosmochemistry: Asteroids and their carbon-rich meteorites
Mètode Science Studies Journal: Annual Review, 2016 Carbonaceous chondrite meteorites are carbon-containing fragments of primitive asteroids that have offered the only samples available to date giving insights into chemical evolution in laboratory analyses.
Sandra Pizzarello
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Tetrataenite in carbonaceous chondrites.
Proceedings of the Japan Academy, Series B, 1990 Presence of tetrataenite grains has been recently confirmed in Yamato 791717 carbonaceous (CO3) chondrite. The observed coexistence of tetrataenite fine grains with more abundant magnetite and kamacite in this CO3 chondrite suggests that the tetrataenite grains were directly formed by a coalescence process of Fe and Ni fine particle smokes in the solar
Takesi NAGATA, Barbara J. CARLETON
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PLoS ONE, 2019 This study presents multiwall and bamboo-like carbon nanotubes found in samples from the Allende carbonaceous chondrite using high-resolution transmission electron microscopy (HRTEM).
Hugo I Cruz-Rosas +10 more
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Trace element geochemistry of ordinary chondrite chondrules: the type I/type II chondrule dichotomy [PDF]
, 2015 We report trace element concentrations of silicate phases in chondrules from LL3 ordinary chondrites Bishunpur and Semarkona. Results are similar to previously reported data for carbonaceous chondrites, with rare earth element (REE) concentrations ...
Alard, Olivier +2 more
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Life, 2019 This study is a multi-technique investigation of the Paris carbonaceous chondrite directly applied on two selected 500 × 500 µm² areas of a millimetric fragment, without any chemical extraction.
Manale Noun +10 more
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Grain Size Effects on UV–MIR (0.2–14 μm) Spectra of Carbonaceous Chondrite Groups
The Planetary Science Journal, 2023 Carbonaceous chondrites are among the most important meteorite types and have played a vital role in deciphering the origin and evolution of our solar system.
David C. Cantillo +9 more
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, 2014 The examination of the physical properties of chondrules has generally received less emphasis than other properties of meteorites such as their mineralogy, petrology, and chemical and isotopic compositions.
Biltz, Alison E. +7 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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A mutli-technique search for the most primitive CO chondrites [PDF]
, 2018 As part of a study to identify the most primitive COs and to look for weakly altered CMs amongst the COs, we have conducted a multi-technique study of 16 Antarctic meteorites that had been classified as primitive COs. For this study, we have determined: (
Alexander +68 more
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Earth, Planets and Space, 2017 We conducted ground-based performance evaluation tests of the Near-Infrared Spectrometer (NIRS3) onboard Hayabusa2 spacecraft in November 2013 and from April to May 2014 and established a method for evaluating its measured reflectance spectra ...
Moe Matsuoka +12 more
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