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文章是在研究海州－大悟含磷岩系及其磷矿底板岩石中不同类型混合岩的岩石学、地球化学的基础上，探讨了变质－深熔过程中稀土元素的活动性状。混合岩穹窿由变沉积岩、混合岩及混合花岗片麻岩组成。变沉积岩、混合岩及混合花岗片麻岩在空间上的密切共生关系，揭示了沉积物经历了变质分异、混合岩化和部分熔融作用改造成花岗质岩石的过程。穹窿具有明显的分带性，从穹窿外向中心，由变质岩带、混合岩带向混合花岗片麻岩带变化，表明了变质反应顺序及混合花岗岩化交代的关系。在变质、混合岩化及部分熔融作用形成混合岩穹窿过程中，磷质发生了运移，在穹窿变质岩与混合岩接触带发生了交代结晶与重结晶作用。在穹窿变质岩带，揉流褶皱成矿作用十分明显
Based on the study of petrology and geochemistry of different types of mixed rocks in the Haizhou-Dawu phosphoriferous rock series and its phosphate rock floor rock, the paper discusses the activities of rare earth elements during the metamorphism-smelting process. The mixed rock dome consists of metamorphic sedimentary rocks, mixed rocks and mixed granitic gneiss. The close symbiosis of the altered sedimentary rocks, mixed rocks and mixed granitic gneisses shows that the sediments underwent metamorphic differentiation, mixed rock formation and partial melting to reconstruct into granitic rocks. The vault has obvious zonality and changes from the metamorphic rock zone and the mixed rock zone to the mixed granite gneiss belt from the outer dome to the center, indicating the sequence of metamorphic reactions and the relationship of the mixed granitization. During metamorphic, migmatitic and partial melting, the migration of phosphorous took place and the crystallization and recrystallization took place in the contact zone between the dome and metamorphic rocks. Dome in the metamorphic rock zone, rubbing flow folds mineralization is very obvious