Origin of water, D/H ratio, comets, carbonaceous chondrites, olivines, late heavy bombardment era, dehydration melting.
Abstract
The question of the origin of water on Earth has been a puzzlesince long. The standard scenario that comets have depositedwater here over eons has many loopholes, and some recentresults have put a question mark on this. Instead, asteroidshave become the favorite candidates for ferrying the water.At the same time, other discoveries seem to hint towards alarge reservoir of water inside Earth.
