TY JOUR TI Strontium isotopic evidence for supercontinental breakup and formation in the Riphean: Western margin of the Siberian craton KW supercontinental breakup KW formation in the Riphean KW Siberian craton. JO Russian Journal of Earth Sciences AU Khabarov, E.M. AU Ponomarchuk, V.A. AU Morozova, I.P. PY 2002 IS 4 PB Geophysical Center of the Russian Academy of Sciences