TY JOUR TI Modification of the lithospheric mantle during the early activity of a cenozoic plume in the North Tien Shan: Evidence from mantle xenoliths in basalts KW Upper mantle KW ultramafic xenoliths KW basalts KW mantle plume KW North Tien Shan JO Russian Journal of Earth Sciences AU Grachev, A.F. AU Ermolov, P.V. AU Wang, Y.. PY 2014 IS 14 PB Geophysical Center of the Russian Academy of Sciences