TY JOUR TI Newly obtained data on He isotopes in mantle xenoliths in basalts from the Vitim Plateau, Eastern Siberia, Russia KW Vitim plateau KW mantle xenoliths KW basalts KW He-Ar and Sr-Nd isotopes JO Russian Journal of Earth Sciences AU , .. PY 2012 IS 12 PB Геофизический центр Российской Академии Наук