The　Cenozoic　basalts　in　Fujian　arc　widcly　devclopcd　and　contain　abundant　mantle　xenoliths,　whose　mineralogical　characteristic　provide　insights　into　the　properties　of　lithospheric　mantle.This　study　conducted　elcctron　microprobes,　clinopyroxenc　LA　-　ICP　-　MS　tracc　dement,　and　in-situ　Sr　isotopes　analyses　on　the　minerals　in　Cenozoic　basalts　and　peridotite　xenoliths　from　Xiamen　along　the　Fujian　coast,　as　well　as　Mingxi　and　Minqing　in　the　inland　region.　The　results　indicate　that　the　clinopyroxenes　in　both　basalt　and　peridotite　xenoliths　arc　predominantly　diopside.　The　peridotite　xenoliths　arc　dividcd　into　two　groups　based　on　mincralogical　characteristics:　Group　A　(Mg＂　＞　90),　representing　an　ancient,　refractory　lithospheric　mantle,　and　Group　B　(Mg＂　＜　90),　representing　a　younger,　modified　enriched　lithospheric　mantle.　Group　A　clinopyroxenc　exhibit　slight　negative　anomalies　in　high-field　strength　elements　Nb　and　Ti,　and　strong　negative　anomalies　in　Hf,　Zr,　and　Ta.　In　Group　B　peridotite,　clinopyroxenc　shows　differences,　with　slightly　negative　anomaly　in　high　high-field　strength　elements　Zr　and　Hf　and　a　pronounced　negative　anomaly　in　the　large　ion　lithophile　element　Ba.　The　clinopyroxenc　in　both　the　phenocrysts　and　matrix　of　the　basalt　exhibits　LREE　enrichment　and　HREE　depletion,　with　the　rims　showing　greater　depletions　in　high-field　strength　elements　Th　and　Nb　compared　to　the　corcs,　along　with　enrichments　in　large　ion　lithophile　elements　Sr　and　Eu.　Most　clinopyroxenes　in　both　Group　A　and　Group　B　xenoliths　have　experienced　Silicate　melt　metasomatism,　while　a　few　Group　A　clinopyroxenc　suggest　a　mix　between　Silicate　and　carbonatc　melt　metasomatism.　In-situ　Sr　isotope　ratios　for　clinopyroxene　ränge　from　0.702　57　to　0.703　67,　with　most　rims　showing　higher　87Sr/86Sr　ratios　than　the　corcs,　likc　duc　to　interaction　with　materials　of　higher　8＇Sr/86Sr　ratios.　The　Fujian　peridotite　probably　represents　a　ncwly　modified　lithospheric　mantle　of　the　Pacific　plate　subduetion　asthenosphere　mantle,　following　decompression　ascent.　©　2025　Editorial　Board　of　Jilin　University.　All　rights　reserved.