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calcium aluminum rich inclusions

Refractory calcium-aluminum-rich inclusions and …

The metal-rich chondrites Hammadah al Hamra (HH) 237 and Queen Alexandra Range (QUE) 94411, paired with QUE 94627, contain relatively rare (<1 vol%) calcium-aluminum-rich inclusions (CAIs) and Al-diopside-rich chondrules.

Calcium–aluminum-rich inclusions recycled during

2017-7-26 · Calcium–aluminum-rich inclusions recycled during formation of porphyritic chondrules from CH carbonaceous chondrites Alexander N. Krota,b,⇑, Kazuhide Nagashimaa, Elishevah M.M. van Kootenb, Martin Bizzarrob aHawai‘i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai‘i at Manoa, Honolulu, HI 96822, USA

Calcium-aluminum-rich inclusions with - …

Calcium-aluminum-rich inclusions with fractionation and unknown nuclear effects (FUN CAIs): I. Mineralogy, petrology, and oxygen isotopic compositions. Author links open overlay panel Alexander N. Krot a Kazuhide Nagashima a Gerald J. Wasserburg a b Gary R. Huss a Dimitri Papanastassiou b c Andrew M. Davis d Ian D. Hutcheon e Martin Bizzarro f.

O ENRICHMENT IN CALCIUM–ALUMINUM-RICH …

EXTREME 16O ENRICHMENT IN CALCIUM–ALUMINUM-RICH INCLUSIONS FROM THE ISHEYEVO (CH/CB) CHONDRITE Matthieu Gounelle1, Alexander N. Krot2, Kazuhide Nagashima2, and Anton Kearsley3 1 Laboratoire de Min´eralogie et de Cosmochimie du Mus eum, CNRS & Mus´eum National d’Histoire Naturelle, UMR 7202, CP52, 57 rue Cuvier, 75 005 Paris,

Aluminum-26 in calcium-aluminum-rich inclusions and

2017-5-8 · characteristics of the aluminum-rich chondrules are also summarized here. Detailed descriptions of the chondrules, including bulk major and trace element compositions, will appear in a separate paper (MacPherson and Huss, in preparation). Calcium-Aluminum-Rich Inclusions-Semarkona 4 1 28- 3-1 (Fig. la) is a -320 x 130 pm, irregularly shaped type A

Aluminum-26 in calcium-aluminum-rich inclusions …

Srinivasan G., Huss G. R. and Wasserburg G. J. (2000a) A petrographic, chemical and isotopic study of calcium-aluminum-rich inclusions and aluminum-rich chondrules from the Axtell (CV3) chondrite. Meteorit. Planet. Sci. 35, 1333 – 1354.

Chronology of the early Solar System from chondrule

Chronology of the early Solar System from chondrule-bearing calcium-aluminium-rich inclusions. A. A. Lead isotopic ages of chondrules and calcium-aluminum-rich inclusions. Science 297, 1678

Calcium-aluminum-rich inclusions and amoeboid …

Calcium-aluminum-rich refractory inclusions (CAIs) in CR chondrites are rare (<1 vol%), fairly small (<500 μm) and irregularly-shaped, and most of them are fragmented. Based on the mineralogy and petrography, they can be divided into grossite ± hibonite-rich, melilite-rich, and pyroxene-anorthite-rich CAIs.

Calcium-Aluminum-Rich Inclusions in Chondritic …

Calcium-aluminum-rich inclusions (CAIs) are sub-mm- to cm-sized clasts in chondritic meteorites. They are composed almost entirely of CaO-Al2O3-MgO-SiO2-TiO2, and they contain the same minerals

Chemical Processes in Igneous Calcium-Aluminum-rich

2006-3-27 · Calcium-,aluminum-rich inclusions (CAIs) and Al-rich chondrules reflect multiple processes in many different en-vironments. In this chapter, we consider constraints on high-temperature processes from the perspective of phase equilib-ria and dynamic crystallization experiments. With chon-drules, whose evolution is discussed in Lauretta et al

Calcium–aluminium-rich inclusion - Wikipedia

2019-4-23 · 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. They are probably the oldest substances in the Solar System. The oldest age was measured in an inclusion of the CV3 carbonaceous chondrite

CAI - calcium-aluminum-rich inclusion | AcronymAttic

Mineralogical map of a calcium-aluminum-rich inclusion (CAI) in the Efremovka carbonaceous chondrite. In this image, obtained with an electron microprobe, the square and diamond-shaped, purplish grains are spinel, an aluminum-rich mineral. The light-green and green areas are crystals of minerals rich in both calcium and aluminum.

Calcium-Aluminum-Rich Inclusions in Chondritic …

Calcium-aluminum-rich inclusions (CAIs) are sub-mm- to cm-sized clasts in chondritic meteorites. They are composed almost entirely of CaO-Al2O3-MgO-SiO2-TiO2, and they contain the same minerals predicted by thermodynamic calculations to condense out of a gas of solar composition during cooling from very high temperatures.

Calcium-aluminum-rich inclusions in enstatite …

Abstract— Like calcium-aluminum-rich inclusions (CAIs) from carbonaceous and ordinary chondrites, enstatite chondrite CAIs are composed of refractory minerals such as spinel, perovskite, Al, Ti-diopside, melilite, hibonite, and anorthitic plagioclase, which may be partially to completely surrounded by halos of Na-(±Cl)-rich minerals. Porous

Chronology of the early Solar System from chondrule

Chronology of the early Solar System from chondrule-bearing calcium-aluminium-rich inclusions. A. A. Lead isotopic ages of chondrules and calcium-aluminum-rich inclusions. Science 297, 1678

Calcium‐aluminum‐rich inclusions in enstatite …

Abstract— Like calcium‐aluminum‐rich inclusions (CAIs) from carbonaceous and ordinary chondrites, enstatite chondrite CAIs are composed of refractory minerals such as spinel, perovskite, Al, Ti‐diopside, melilite, hibonite, and anorthitic plagioclase, which may be partially to completely surrounded by halos of Na‐(±Cl)‐rich minerals. . Porous, aggregate, and compact textures of

Understanding Solar System History: CAIs in …

2019-4-24 · An interstellar origin for the beryllium 10 in calcium-rich, aluminum-rich inclusions. The Astrophysical Journal 602:528-542. Dunham E., Wadhwa M., Liu M.-C. 2017. The range of initial 10 Be/ 9 Be ratios in the early Solar System: a re-assessment based on analyses of new CAIs and melilite composition glass standards (abstract #6381).

Oxygen isotopes in calcium^aluminum-rich inclusions …

2004-2-26 · Calcium^aluminum-rich inclusions (CAIs) from enstatite chondrites have large 16O excesses, similar to CAIs in carbonaceous and ordinary chondrites, and are also similar in morphology, mineralogy and Al^Mg isotopic systematics. These similarities provide new evidence that most CAIs might have formed in a single, restricted nebular

Inclusion minérale riche en calcium et en aluminium

2019-4-24 · Les inclusions minérales riches en calcium et en aluminium, en anglais calcium-aluminium-rich inclusions ou Ca-Al-rich Inclusions (CAI), sont des enclaves[a] réfractaires de taille submillimétrique à centimétrique, formées essentiellement de minéraux notablement riches en calcium et en aluminium, qu''on trouve dans les météorites du

Tellurium isotope compositions of calcium-aluminum-rich

Tellurium isotope compositions of calcium-aluminum-rich inclusions 973 Measurements with Faraday Collectors Samples that contained more than ~100 pg Te were measured by static multiple collection using Faraday collectors with procedures similar to those described by Fehr and co-workers (Fehr et al. 2004, 2006). Data acquisition for

Lead Isotopic Ages of Chondrules and Calcium …

The lead-lead isochron age of chondrules in the CR chondrite Acfer 059 is 4564.7 ± 0.6 million years ago (Ma), whereas the lead isotopic age of calcium-aluminum–rich inclusions (CAIs) in the CV chondrite Efremovka is 4567.2 ± 0.6 Ma. This gives an interval of 2.5 ± 1.2 million years (My) between formation of the CV CAIs and the CR chondrules and indies that CAI- and chondrule-forming

Calcium-Aluminum-Rich Inclusions from Enstatite …

The primary mineral asselages and initial ^(26)Al/^(27)Al ratios of rare calcium-aluminum–rich inclusions (CAIs) from enstatite (E) chondrites are similar to those of CAIs from other chondrite classes. CAIs from all chondrite classes formed under oxidizing conditions that are much different from the reducing conditions under which the E chondrites formed.

CALCIUM-ALUMINUM-RICH INCLUSIONS (CAIs)

1999-11-2 · Relic Ca,Al-rich Inclusions in Chondrules from the Carbonaceous Chondrites Acfer 182 and Acfer 094 [#1511] We describe the discovery of two relic CAIs inside chondrules. The relic CAIs and host chondrules contain phases, plagioclase and hibonite, suitable for Al-Mg isotopic study, and may provide information on the time

Isotopic heterogeneity in calcium-aluminum-rich …

Calcium-Aluminum-rich inclusions (CAI), found in meteorites, are among the oldest known solids identified in the solar system. Analyses of CAI have provided constraints on physical and chemical conditions that existed just prior to, and during planetary formation. A few rare inclusions, called FUN (for Fractionation and Unknown Nuclear effects), exhibit large isotopic anomalies and have

Calcium-Aluminum-rich Inclusions (CAI''s) - Amethyst …

Calcium-Aluminum-rich Inclusions (or CAI''s) are the light-colored inclusions common in carbonaceous chondrites.Like chondrules, CAI''s are composed of refractory minerals, but there are several significant differences.As their name indies, they are rich in calcium and aluminum minerals, and they are also quite poor in iron.

The formation of rims on calcium-aluminum-rich …

Wark-Lovering rims of six calcium-aluminum-rich inclusions (CAIs) representing the main CAI types and groups in Allende, Efremovka and Vigarano were microsurgically separated and analysed by neutron activation analysis (NAA).

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