All chondrites accreted∼ 3.5 wt.% C in their matrices, the bulk of which was in a
macromolecular solvent and acid insoluble organic material (IOM). Similar material to IOM is …

▪ Abstract Chondrules are∼ 1-mm igneous droplets in primitive meteorites, and their
abundance suggests widespread melting in the protoplanetary disk. Chondrules with relict …

Chondrule textures depend on the extent of melting of the chondrule precursor material
when cooling starts. If viable nuclei remain in the melt, crystallization begins immediately …

We present detailed electron microprobe analyses and oxygen three-isotope measurements
by high precision secondary ion mass spectrometry on 45 type I (FeO-poor) …

1. INTRODUCTION may be that much of the early solar nebula consisted of completely
vaporized primordial material (> 1800 K) that cooled monotonically (Cameron, 1963; Kurat …

We review a number of constraints that have been placed on the formation of chondrules
and show how these can be used to test chondrule formation models. Four models in …

Ca–Al rich refractory mineral inclusions (CAIs) found at 1–6% mass fraction in primitive
chondrites appear to be 1–3 million years older than the dominant (chondrule) components …

We review chemical, mineralogical and isotopic properties of chondrules that can be used to
investigate chondrule origins. Although many interpretations of chondrule properties are …

Chromium, silicon, and phosphorus concentrations of 0.1 to 1 percent by weight are
common in metal grains in the least metamorphosed ordinary and carbonaceous chondrites …

High-precision oxygen three-isotope measurements of olivine and pyroxene were
performed on 33 chondrules in the Yamato 81020 CO3. 0 chondrite by secondary ion mass …