University, Sapporo, 001-0021, Japan, 3Antarctic Meteorite Research Center, National Institute of Polar Research...to one of the most primitive meteorites. This meteorite contains highly abundance of presolar grains [1]...anticipated [6]. [6] observed that Fe,Ni metal in this meteorite was invariably and extensively altered to form...eucrites, except for CD, Fe-Ni Metal (kamacite- tetrataenite ± taenite) is associated with troilite. In diogenites...increasing metamorphism, reaching ~12,000‰ in one meteorite. This enrichment is almost 4 times that in the |