Abundance and Size Distribution of Inclusions in Cv3 Chondrites by X-ray Image

SYNCHRONIZING THE ABSOLUTE AND RELATIVE CLOCKS: Pb-Pb AND Al-Mg SYSTEMATICS IN CAIs FROM THE ALLENDE AND NWA 2364 CV3 CHONDRITES

Introduction: In recent years, several high-resolution chronometers have been applied towards addressing the important question of the age of the Solar System, which is best estimated from the formation age of the calcium-aluminum-rich inclusions (CAIs), recognized as the earliest-formed solids in the solar nebula. However, there are inconsistencies in the ages of CAIs as determined by differen...

Analysis of refractory inclusions in the Allende and Axtell CV3 chondrites via electron-backscatter diffraction

Oxygen Isotopic Compositions of Fayalite in the Kaba Cv3 Carbonaceous Chondrite

INTRODUCTION The Fe-rich olivine end-member, fayalite (Fa100), occurs in the matrix, chondrules, CAIs, silicate aggregates, and dark inclusions in the oxidized Kaba and Mokoia CV3 chondrites, where it is associated with magnetite and troilite. To help constrain the origin of the fayalite, we measured O-isotope compositions of fayalite (Fa98-100) from two petrographic settings of the Kaba meteor...

FIRST Ti-XANES ANALYSES OF REFRACTORY INCLUSIONS FROM MURCHISON

Introduction: A system of solar composition is so reducing that Ti and Ti can coexist, making the valence of Ti a valuable indicator of fO2 conditions during formation of nebular materials. The Ti/Ti ratios observed in the Ti-rich phases fassaite and rhönite in coarse-grained refractory inclusions from CV3 chondrites have been shown [1,2] to be quantitatively consistent with formation in a gas ...

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