Mantle Xenoliths from the Obnazhennaya Kimberlite, Yakutia

Introduction The Obnazhennaya kimberlite erupted near the edge of the Siberian platform and is diamondfree; are these two facts related? By studying eclogite and peridotite xenoliths from the Obnazhennaya kimberlite, we hope to determine why the mantle conditions beneath the northeastern edge of the Siberian platform are not conducive to diamond growth, or that diamonds could exist in the mantle beneath Obnazhennaya, but were destroyed enroute to the surface.