Calcium–aluminium-rich inclusion - Wikipedia
网页Chondrite meteorite with calcium–aluminium-rich inclusions seen as white specks. A calcium–aluminium-rich inclusion or Ca–Al-rich inclusion (CAI) is a submillimeter- to centimeter-sized light-colored calcium - and aluminium -rich inclusion found in carbonaceous chondrite meteorites.
Astronomical context of Solar System formation from ... - Science
网页2020年11月13日 · Calcium-aluminum–rich inclusions (CAIs) in meteorites are the first solids to have formed in the Solar System, defining the epoch of its birth on an absolute time scale. This provides a link between astronomical observations of star formation and cosmochemical studies of Solar System formation.
Computed Tomographic Analysis of Meteorite Inclusions
网页The discovery of isotopic anomalies in the calcium- and aluminum-rich inclusions of the Allende meteorite has improved our knowledge of the origin of the solar system. Inability to find more inclusions without destroying the meteorite has hampered further study.
High early solar activity inferred from helium and neon ... - Nature
网页2018年7月30日 · These include seven spinel–hibonite inclusions, which, like CV CAIs, are typically rich in primordial 26 Al and have smaller nucleosynthetic anomalies than PLACs 10, 15, 16, implying a later...
A large planetary body inferred from diamond inclusions in a
网页2018年4月17日 · Here, the authors analyse inclusions within diamonds from a ureilite meteorite and find that they must have formed at above 20 GPa suggesting the parent body was Mercury- to Mars-sized.
Calcium–aluminum‐rich inclusions in non‐carbonaceous …
网页2023年5月12日 · The Tescan Vega SEM at UCLA was used to map meteorite sections, to find candidate inclusions and identify CAIs, to X-ray map CAIs, and to perform energy dispersive spectroscopy (EDS) for initial mineralogy characterization.
New Insights into the Origin of Calcium-Aluminum-Rich Inclusions …
网页2023年6月6日 · Despite forming very near the Sun, CAIs are abundant in carbonaceous chondrite (CC) meteorites, which accreted in the cold, outer solar system. This constitutes a “classic” problem regarding the timing and transport of CAIs throughout the solar system.
Accretion of the earliest inner Solar System planetesimals beyond …
网页2024年1月9日 · Fe/Ni and Fe/Co ratios in iron meteorites indicate that the earliest inner Solar System planetesimals were oxidized and water-bearing, having formed beyond the point at which water condensed in...
Ancient Asteroids Enriched in Refractory Inclusions | Science - AAAS
网页2008年4月25日 · Calcium- and aluminum-rich inclusions (CAIs) occur in all classes of chondritic meteorites and contain refractory minerals predicted to be the first condensates from the solar nebula. Near-infrared spectra of CAIs have strong 2-micrometer absorptions, attributed to iron oxide–bearing aluminous spinel.
Scientists Find Extreme Oxygen Isotope Variation in Meteorite
网页2013年6月5日 · RELEASE J11-007. HOUSTON – NASA research on a meteorite has provided new evidence that the inner planets formed from materials spread far and wide in the early solar system, and not just from nearby matter. Oxygen isotopic measurements in the core and outer rim of a calcium-aluminum-rich inclusion contained in the Allende meteorite record the ...
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