Abstract:By the study and comparison of the chemical compositions of the garnets and diopsides from deep-seated xenoliths in the kimberlites in Shandong with those of the same minerals in diamond and diamondiferous xenoliths, as have been reported in the literature, the author shows that the difference in chemical compositions of the same mineral in the xenoliths derived from different depth can exist, and further expounds the characteristics in chemistry of those deepest-seated minerals in the kimberlites which are...