Chondritic Asteroids

1
Chondritic AsteroidsWhen didAqueous Alteration
Happen?
New fayalite standard allows the 53Mn-53Cr
chronology of aqueous alteration on chondritic
parent bodies.
The data indicate that hydrated asteroids, at
least those sampled by meteorites, accreted in
the inner Solar System near the main asteroid
belt 24 million years after the beginning of the
Solar System, rather than migrating inward after
forming in the Solar System's colder, outer
regions beyond Jupiter's present orbit.
Meteorite fayalite formation age in Myr after
CV CAIs
Elephant Moraine 90161 (UOC)
MacAlpine Hills 88107 (CO)
Asuka 881317 (CV)