Abstract:Based on the detailed studies about petrology and major elements of peridotite xenoliths from Huinan (Jilin Province) Cenozoic basalts, in situ LA-ICP-MS trace element compositions of clinopyroxenes were analyzed. The natu re and evolution of the Cenozoic subcontinent lithospheric mantle (SCLM) benea th Huinan area at the north-east edge of the North China were discussed. Mg# and Cr# values of minerals (such as olivine, clinopyroxene and spinel) show the SCLM beneath the area is mainly fertile with minor transitional/refratory relicts. Chondrite-normalized REE patterns of clinopyroxenes widely vary from LREE-depleted, through convex-upward to LREE-enriched. The SCLM represents the products which have experienced different degrees of fractional partial melting (lower than 10%) and complicated mantle metosomatism. Most of the samples have been affected by silicate melt metasomatism with several samples as relicts of carbonatitic melt metasomatism. No correlation between Mg# in olivine and equilibration temperature suggests that there is no obvious stratification within the Huinan SCLM. These mantle characteristics, similar with that of the dominate Cenozoic mantle beneath other parts of the eastern North China, represent the comprehensive results that newly accreted materials replace the aged lithospheric mantle through melt-rock interaction /erosion and the coolin g of the upwelled asthenospere.