Thermal alteration of labile elements in carbonaceous chondrites

Aqueous Alteration of Carbonaceous Chondrites: Evidence for Asteroidal

Carbonaceous Nanospheres in Chondrites

Introduction: In the 1960s, prior to the widespread use of TEMs, several papers described rounded, micron-sized organic particles from carbonaceous chondrite (CC) meteorites [1-3]. Some of these particles were hollow. Except for two early TEM studies [4, 5], the rounded structures were essentially neglected until similar material was discovered in the Tagish Lake meteorite [6]. We subsequently ...

Petrographic, chemical and spectroscopic evidence for thermal metamorphism in carbonaceous chondrites I: CI and CM chondrites

We present a comprehensive description of petrologic, chemical and spectroscopic features of thermally metamorphosed CI-like and CM (and CM-like) chondrites. Only two such CI chondrites have so far been discovered i.e. Y-86029 and Y82162. Thermal metamorphism in these chondrites is apparent in their low contents of H2O, C and the most thermally labile trace elements, partial dehydration of matr...

The Role of Microchemical Environments in the Alteration of Cm Carbonaceous Chondrites

Introduction: Aqueous fluids have left their fingerprint on almost all the known chondrite groups and attest to the fact that water was a widespread agent of change in the early solar system [1,2]. The interaction of liquid or gaseous water with the primary products of nebular processes caused significant textural, mineralogical, compositional and isotopic changes that are often very complex to...

Determing the Effects of Aqueous Alteration on the Distribution of Oxygen Isotopes in Carbonaceous Chondrites

(2006). Determing the effects of aqueous alteration on the distribution of oxygen isotopes in carbonaceous chondrites.