calcium aluminum rich inclusions in chondritic meteorites

Oxygen isotopes in calcium–aluminum-rich inclusions …

2000/9/15· Calcium–aluminum-rich inclusions (CAIs) from primitive chondritic meteorites were among the first-formed solids in the solar nebula ∼4.6 Ga, and therefore bear important physical and chemical information about the earliest stages of solar system evolution.

(PDF) The Origin of Chondrules and Refractory …

Examples of calcium-aluminum È rich inclusions (CAIs) surrounded by thick chondrule mantles have been found in chondritic meteorites and cast doubt on the conventional belief that CAIs and

Refractory Inclusions in Chondritic Meteorites | …

2017/4/29· MacPherson GJ (2014) Calcium-aluminum-rich inclusions in chondritic meteorites. In: Davis AM (ed) Meteorites, comets and planets Vol. 1, Treatise on geochemistry (eds) Holland HD , Turekian KK, pp. 139–179. Elsevier, Oxford Google Scholar

Calcium–aluminium-rich inclusion and similar topics | …

Chondrules and calcium–aluminium-rich inclusions (CAIs) are spherical particles that make up chondritic meteorites and are believed to be the oldest objects in the solar system. Lead–lead dating - Wikipedia

(PDF) The Origin of Chondrules and Refractory …

Examples of calcium-aluminum-rich inclusions (CAIs) surrounded by thick chondrule mantles have been found in chondritic meteorites and cast doubt on the conventional belief that CAIs and

Calcium-Aluminum-rich Inclusions: Major Unanswered Questions

Calcium-aluminum-rich inclusions (CAIs) preserve a record of events in the earliest solar system, the timing of these events and the conditions under which they occurred. Recent technical (analytical instrumentation) and theoretical advances have

Growth of calcium–aluminum-rich inclusions by coagulation and fragmentation in a turbulent protoplanetary disk: Observations and …

Calcium–aluminum-rich inclusions (CAIs) from chondritic meteorites are the oldest objects formed in the Solar System as indied by their absolute radiometric ages using the U–Pb chronometer (e.g. Amelin et al., 2010; Bouvier and Wadhwa, 2010; Connelly et

Calcium-aluminum-rich inclusions in enstatite chondrites (I): …

Refractory calcium-aluminum-rich inclusions (CAls) in chondritic meteorites are of pivotal interest because they yield evidence of the physical and chemical conditions of high-temperature processing, such as condensation, evaporation, and melting, ofsolar

Refractory Inclusions in Chondritic Meteorites | …

2017/4/29· MacPherson GJ (2014) Calcium-aluminum-rich inclusions in chondritic meteorites. In: Davis AM (ed) Meteorites, comets and planets Vol. 1, Treatise on geochemistry (eds) Holland HD , Turekian KK, pp. 139–179. Elsevier, Oxford Google Scholar

Oxygen isotopes in calcium–aluminum-rich inclusions …

2000/9/15· Calcium–aluminum-rich inclusions (CAIs) from primitive chondritic meteorites were among the first-formed solids in the solar nebula ∼4.6 Ga, and therefore bear important physical and chemical information about the earliest stages of solar system evolution.

calcium-aluminum-rich inclusions in chondritic …

On the Early Thermal History of Chondritic Asteroids Derived by 244-Plutonium Fission Track Thermometry, Impact features of enstatite-rich meteorites, Chemie der Erde - Geochemistry, 10.1016/j.chemer.2014.09.001, 75, Calcium–Aluminum-Rich Inclusions in

MICROSTRUCTURAL ANALYSIS OF A COMPACT TYPE-A CALCIUM-ALUMINUM RICH …

Introduction: Primitive chondritic meteorites can contain mm- to cm-sized objects calcuim- called aluminum-rich inclusions (CAIs) [1]. These objects are composed of Ca- and Al-rich refractory materials that have been thermodynamically predicted and isotopical

Astronomical context of Solar System formation from …

2020/11/13· 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

Calcium–aluminium-rich inclusion - Wikipedia

2010/2/4· Abstract. 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.

Incorporation of 36Cl into Calcium-Aluminum-Rich …

2013/12/4· Abstract. We consider the short-lived radionuclide (SLR) 36 Cl in calcium-aluminum-rich inclusions (CAIs) found in primitive meteorites with the solar wind implantation model. In this model, SLRs are produced via nuclear reaction with solar energetic particles (SEPs) interacting with gaseous targets in the protosolar atmosphere in T-Tauri stars.

Aluminum-26 in calcium-aluminum-rich inclusions and …

Chondrules and calcium-aluminum-rich inclusions (CAIs) are two important primary constituents of chondritic meteorites. Both formed at high temperatures early in solar system history and record the timing and conditions in the earliest stages of solar system

CALCIUM ISOTOPE COMPOSITION OF METEORITES, EARTH, …

2. CALCIUM ISOTOPE MEASURMENTS This study reports calcium isotopic compositions for thirteen igneous rocks from Earth, eight achondrites (including four Martian meteorites), nine primitive chondritic meteorites, and two igneous refractory inclusions from

Metasomatism in the Early Solar System: The Record …

2012/4/6· MacPherson GJ (2003) Calcium–aluminum-rich inclusions in chondritic meteorites. In: Davis AM (ed) Meteorites, comets, and planets meteorites, comets, and planets, vol 1. Elsevier-Pergamon, Oxford, pp 201–241 Google Scholar

Calcium-Aluminum-rich Inclusions in Chondritic …

2003/12/1· Calcium-aluminum-rich inclusions (CAIs) are submillimeter- to centimeter-sized clasts in chondritic meteorites, whose ceramic-like chemistry and mineralogy set them apart from other chondrite components. Since their first descriptions more than 30 years ago (e.g., Christophe Michel-Lévy, 1968), they have been the objects of a vast amount of study.

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. These features, together

calcium-aluminum-rich inclusions in chondritic …

2009-10-30 · particular, the so-called calcium aluminum-rich inclusions (CAIs) found in chondritic meteorites show characteristic enrichments of around five percent in 16O when compared to terrestrial rocks and other major meteorite components.

Calcium-Aluminum-Rich Inclusions from Enstatite …

2000/8/25· The primary mineral asselages and initial26Al/27Al ratios of rare calcium-aluminum–rich inclusions (CAIs) from enstatite (E) chondrites are similar to those of CAIs from other chondrite classes.

Calcium-Aluminum-Rich Inclusions in Chondritic Meteorites

Calcium-aluminum-rich inclusions (CAIs) and amoeboid olivine aggregates (AOAs), a refractory component of chondritic meteorites, formed in a high-temperature region of the protoplanetary disk

Titanium isotope signatures of calcium-aluminum …

2019/10/15· Calcium-aluminum-rich inclusions (CAIs) are the first solids to form in the early Solar System, and they exhibit nucleosynthetic anomalies in many isotope systems. The overwhelming majority of isotopic data for CAIs is limited to inclusions from the CV chondrite Allende and a few other CV, CO, CM, and ordinary chondrites.

Understanding Solar System History: CAIs in …

2018/7/1· One of the ancient objects contained within Allende, and meteorites like it, are called calcium-aluminum-rich inclusions (CAIs). These were the first solids that formed out of the hot (>1300 K) gas and dust “soup” of the early Solar System (Scott & Krot, 2014; Figure 1). It is truly incredible how microscopic, dust-bunny-like condensates

PETROGRAPHY AND MINERALOGY OF A LARGE CALCIUM, ALUMINUM-RICH …

or melt crystallized solid as inclusions within chondritic meteorites have given the first forming Solar system solids their eponymous name of Calcium, aluminum, - rich inclusions (CAIs). Modal abundance, mean size, constituent mineral phases vary significantly

MICROSTRUCTURAL ANALYSIS OF A COMPACT TYPE-A CALCIUM-ALUMINUM RICH …

Introduction: Primitive chondritic meteorites can contain mm- to cm-sized objects calcuim- called aluminum-rich inclusions (CAIs) [1]. These objects are composed of Ca- and Al-rich refractory materials that have been thermodynamically predicted and isotopical

CALCIUM-ALUMINUM-RICH INCLUSIONS (CAIs)

Calcium-Aluminum-rich Inclusions in Unequilibrated Enstatite Chondrites: A Preliminary Petrologic and Isotopic Study [#1391] CAIs in three enstatite chondrites resele those in carbonaceous and ordinary chondrites; one, a hibonite-