Results 31 to 40 of about 3,762 (245)
Life, 2013 A series of non-proteinogenic amino acids, most of them found quite commonly in the meteorites known as carbonaceous chondrites, were subjected to solid state radiolysis in vacuum to a total radiation dose of 3.2 MGy corresponding to 23% of the total ...
Yaser Hafez +3 more
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The message of oldhamites from enstatite chondrites
Progress in Earth and Planetary Science, 2022 We have determined rare-earth element (REE) abundances in oldhamites (CaS) from 13 unequilibrated and equilibrated enstatite chondrites (5 EH and 8 EL) and in a few enstatites by in situ, laser ablation ICP-MS.
Tahar Hammouda +3 more
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Space Weathering Simulation Trends on Carbonaceous Chondrites [PDF]
, 2020 Space weathering on primitive asteroids is an ongoing area of research. Primitive asteroids have low geometric albedo (= 0.15) and mostly featureless visible spectra (~0.5 - 0.9 µm) (Campins et al. 2018).
Malfavon, Andrew
core +1 more source
Roughness and Angularity of Fragments from Meteorite Disruption Experiments
The Planetary Science Journal, 2023 In this study, we set out to explore the relationship between fracture roughness and sample strength. We analyze 45 fragments of Aba Panu, Allende, and Tamdakht, three meteorites that have been strength-tested to disruption, to determine whether their ...
Gabriel Gowman +5 more
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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
NAGATA, Takesi, CARLETON, Barbara J.
openaire +2 more sources
Mineralogical alteration of CM carbonaceous chondrites: A view [PDF]
, 1989 P(論文)CM carbonaceous chondrites have been considerably affected by aqueous alteration, probably on the regolith of their parent body or bodies. The aqueous alteration resulted in the alteration of anhydrous silicates, metal, and sulfides, producing a ...
Tomeoka,Kazushige +2 more
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The Nitrogen Heterocycle Content of Meteorites and Their Significance for the Origin of Life
Life, 2018 Carbonaceous chondrites are very primitive meteorites that are rich in carbon. They contain many soluble organic compounds, including nitrogen heterocycles.
Zita Martins
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Organic material in meteorites and the link to the origin of life
BIO Web of Conferences, 2014 Life requires specific conditions that have been, so far, only proven to meet on Earth. Though the chemical elements required to form living organism (C, H, N, O, S, etc) are widespread in the universe, the molecules that are crucial for Life, like ...
Remusat L.
doaj +1 more source
Progress in Earth and Planetary Science, 2022 Enstatite chondrites are a small clan of meteorites, only ~ 1% out of all meteorite collection. However, they are the most reduced meteorites and have almost identical isotopic compositions to those of the Earth, suggestive of significant contributions ...
Yangting Lin
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Carbonaceous Chondrites Provide Evidence for Late-stage Planetesimal Formation in a Pressure Bump
The Astrophysical JournalCarbonaceous chondrites are samples from planetesimals that formed 2–4 million years after solar system formation began. They consist of distinct dust components formed at different times and locations in the accretion disk, and whose abundances in ...
Nerea Gurrutxaga +3 more
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