Chondritic components such as chondrules and matrix are the key time capsules that can
help us understand the evolution and dynamics of the protoplanetary disk from which the …

We have investigated the fine‐grained matrix of the least‐altered unequilibrated ordinary
chondrite (UOC) Semarkona (LL3. 00) using different electron microscope techniques …

We report a NanoSIMS search for presolar grains in the CM chondrites Asuka (A) 12169 and
A12236. We found 90 presolar O‐rich grains and 25 SiC grains in A12169, giving matrix …

Presolar grains are trace components in chondrite matrices. Their abundances and
compositions have been systematically studied in carbonaceous chondrites but rarely in situ …

We report a correlated Nano SIMS‐transmission electron microscopy study of the
ungrouped carbonaceous chondrite Northwest Africa (NWA) 5958. We identified 10 presolar …

Porous, igneous glassy microchondrules are relatively common in Semarkona and other
unequilibrated ordinary chondrites (UOC), occurring embedded within the fine-grained …

In order to understand the effects of the earliest stages of hydrothermal alteration and fluid‐
assisted metamorphism on the matrices of unequilibrated ordinary chondrites (UOCs), we …

We report on the isotopic, chemical, and structural properties of four O‐rich presolar grains
identified in situ in the Adelaide ungrouped C2, LaPaZ Icefield (LAP) 031117 CO 3.0, and …

Here we report in situ structural and chemical analyses of four presolar grains and the
matrices of the Meteorite Hills (MET) 00526 L3. 05 and Queen Alexandra Range (QUE) …

Presolar grains are among the original building blocks of our solar system from which the
sun and planets formed. These grains formed in the circumstellar envelopes of evolved stars …