1. Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, Shandong, China;
2. Key Laboratory of Marine Geology and Environment(Chinese Academy of Science), Qingdao 266071, Shandong, China;
3. University of Chinese Academy of Science, Beijing 100049, China;
4. Institute of Surface-Earth System Science, Tianjin University, Tianjin 300072, China

This study reports the petrology and mineralogy characteristics of the phlogopite-bearing pyroxenites from the basalt near Gezishan in Darinoor in the northern margin of North China Craton, and in-situ major and trace element compositions of clinopyroxenes, orthopyroxenes, phlogopites and intergranular melts in the pyroxenites. The results show that clinopyroxenes and orthopyroxenes are characterized by low Mg^# and Cr₂O₃ content and high Al₂O₃ content, and the orthopyroxenes also show high MnO content, which indicates that these pyroxenites were segregated from metasomatic melts in upper mantle. The appearance of phlogopites and intergranular melts in pyroxenite, and their unbalanced geochemical characteristics indicate that the pyroxenite was metasomatized by silicate melt after its formation. The geochemical characteristics of the calculated parental magma of clinopyroxenes, such as the weakly negative anomalies of K, Pb and lacking negative anomalies of Nb, Ta, Ti in the spider diagram, indicate that their mantle source was asthenosphere mantle. The geochemical characteristics of intergranular melts, such as the lower SiO₂ concentration and higher content of MgO and FeO, indicate their source was the partial melting of ultrabasic rocks from mantle. And the positive anomalies of K, Pb and negative anomalies of Nb, Ta in spider-gram of intergranular melts indicate the contribution of subducted terrigenous sediments in their mantle source.Therefore, it is concluded that there were multi-stage metasomatisms in the Cenozoic lithosphere mantle in eastern China.