Silicate dust particles are an important player in the cosmic life cycle of matter. They have
been detected in a wide variety of environments, ranging from nearby protoplanetary disks …

Extraterrestrial materials, including meteorites, interplanetary dust, and spacecraft-returned
asteroidal and cometary samples, provide a record of the starting materials and early …

From their birth as condensates in the outflows of oxygen-rich evolved stars, processing in
interstellar space, and incorporation into disks around new stars, amorphous silicates …

We report the identification of presolar silicates (∼ 177 ppm), presolar oxides (∼ 11 ppm),
and one presolar SiO 2 grain in the Allan Hills (ALHA) 77307 chondrite. Three grains having …

Close to a thousand presolar silicate grains have been identified since their initial discovery
in interplanetary dust particles (IDPs) just over ten years ago. Studies have shown that …

It has been suggested that the matrices of all chondrites are dominated by a common
material with Ivuna-like (CI) abundances of volatiles, presolar grains and insoluble organic …

Amorphous silicates in meteoritic samples are significant as potential surviving interstellar
dust from the formation of the Solar System. Amorphous silicate-rich grains called GEMS …

A comprehensive study of the organic chemistry and mineralogy of an ultracarbonaceous
micrometeorite (UCAMM D05IB80) collected from near the Dome Fuji Station, Antarctica …

Systematic variations in 54Cr/52Cr ratios between meteorite classes (Trinquier et al., 2007;
Qin et al., 2010a) point to large scale spatial and/or temporal isotopic heterogeneity in the …

We report on Mg and Si isotope data of 86 presolar silicate grains identified through
NanoSIMS oxygen ion imaging in thin sections of carbonaceous and ordinary chondrites …