Combined Investigation of Chromium, Titanium, and Magnesium Isotope Compositions of Refractory Inclusions from a Variety of Carbonaceous Chondrites

Magnesium, Titanium and Chromium Isotope Compositions of Refractory Inclusions from Several Cv3 and Ck3 Chondrites: Implications for Nebular Heterogeneity

Calcium isotopic compositions of chondrites

We report mass-dependent and mass-independent Ca isotopic variations in nine chondrites from three groups: carbonaceous, ordinary and enstatite chondrites. There is about 0.25‰ per amu, i.e., 1‰ in Ca/Ca, variation in chondrites: carbonaceous chondrites have the lightest Ca isotopes, enstatite chondrites have modeled bulk Earth like Ca isotopes, and ordinary chondrites are in between. The corre...

Magnesium Isotope Compositions of Chondrules from the Murchison and Murray Carbonaceous Chondrites

Introduction: High-precision Mg isotope compositions of meteorites and their components can provide unique constraints on the time scales and processes involved in their formation [1]. Since the advent of multicollector inductively coupled plasma mass spectrometry (MC-ICPMS), there have been several reports of high-precision analyses of the mass-dependent fractionation of Mg isotopes in chondru...

Nickel Nucleosynthetic Anomalies in Leachates of Carbonaceous Chondrites

Introduction: The numerous nucleosynthetic isotopic anomalies found in refractory inclusions, in presolar grains, and in special phases carried by chondrites suggest that the matter constituting the solar system results from a mixing between different sources. Recently, Ni nucleosynthetic anomalies have been found in various meteorites, including iron meteorites, ureilites, chondrites [e.g. 1-3...

Titanium isotopic composition of CAIs from the Axtell and Leoville carbonaceous chondrites

The Ti isotopic compositions previously determined for “normal” (i.e., non-FUN) calcium-aluminum-rich inclusions (CAIs) from primitive chondrites display relatively small, but resolvable mass-independent anomalies, most likely of nucleosynthetic origin [1-10]. However, the limited dataset makes it difficult to conclude whether this range of compositions reflects the degree of heterogeneity in t...