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Project Summary

The ultimate goal of our study is to understand the origin of water in planetary bodies (asteroids, comets and terrestrial planets) and its role in aqueous and hydrothermal processes on these bodies. In our current project, we focused on CV (Vigarano type) carbonaceous chondrites, which contain many secondary minerals resulting from aqueous alteration in their parent asteroids. On the other hand, CV chondrites also contain heavily metamorphosed fragments, which may have formed in interior of CV asteroids. In order to better understanding for the evolution of CV hydrous asteroids, it is important to study both of secondary minerals and metamorphosed fragments.