Oxygen Isotopic Compositions of Fayalite in the Kaba Cv3 Carbonaceous Chondrite

Fayalite in the Vigarano CV3 carbonaceous chondrite: Occurrences, formation age and conditions

Petrography, stable isotope compositions, microRaman spectroscopy, and presolar components of Roberts Massif 04133: A reduced CV3 carbonaceous chondrite

Here, we report the mineralogy, petrography, C-N-O-stable isotope compositions, degree of disorder of organic matter, and abundances of presolar components of the chondrite Roberts Massif (RBT) 04133 using a coordinated, multitechnique approach. The results of this study are inconsistent with its initial classification as a Renazzo-like carbonaceous chondrite, and strongly support RBT 04133 bei...

Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia

A new meteorite find, named Khatyrka, was recovered from eastern Siberia as a result of a search for naturally occurring quasicrystals. The meteorite occurs as clastic grains within postglacial clay-rich layers along the banks of a small stream in the Koryak Mountains, Chukotka Autonomous Okrug of far eastern Russia. Some of the grains are clearly chondritic and contain Type IA porphyritic oliv...

Origin of a metamorphosed lithic clast in CM chondrite Grove Mountains 021536

A metamorphosed lithic clast was discovered in the CM chondrite Grove Mountains 021536, which was collected in the Antarctica by the Chinese Antarctic Research Exploration team. The lithic clast is composed mainly of Fe-rich olivine (Fo62) with minor diopside (Fs9.7–11.1Wo48.3–51.6), plagioclase (An43–46.5), nepheline, merrillite, Al-rich chromite (21.8 wt% Al2O3; 4.43 wt% TiO2), and pentlandit...

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...