The　properties　of　subcontinental　lithospheric　mantle　beneath　the　eastern　North　China　Craton　changed　significantly　in　the　Mesozoic-Cenozoic,　but　details　are　sketchy.　In　this　study,　we　report　major　element　and　oxygen　isotopic　compositions　of　olivine　phenocrysts　from　early　Cretaceous　Xiaoling　basalts　and　olivine　xenocrysts　from　Quaternary　Kuandian　basalts.　The　olivine　phenocrysts　from　the　Xiaoling　basalts　show　relatively　low　Fo　values　(79~88),　Mn/Fe　(1.3~1.6)　and　Ca/Fe　ratios　(0.2~1.5),　but　relatively　high　CaO　(greater　than　0.1%)　and　Ni/Mg　values　(0.4~1.2),　indicating　that　the　Xiaoling　basalts　were　derived　from　a　hybrid　source　of　peridotite　and　pyroxenite　within　the　lithoshperic　mantle.　Their　δ18O　(4.77‰~　5.96‰,　mean　5.4‰)　values　significantly　higher　than　those　of　the　normal　mantle　value,　further　demonstrate　the　influence　of　cryogenic　hydrothermal　alteration　oceanic　crust　melt/fluid　components　in　the　mantle　source.　The　olivine　xenocrysts　from　the　Kuandian　basalts　have　Fo　values　ranging　from　88　to　92,　together　with　high　NiO　(0.3%~0.4%)　and　low　CaO　(　©　2022　Geological　Society　of　China.　All　rights　reserved.