magma system造句

The compositions of usual elements and rare earth elements and inclusions of corundum megacrysts related to alkali basalt in changle , shandong province , are analyzed . in the main parts of corundum megacrysts are a large number of fluid - melting inclusions , zircon , ta - columbite inclusions , and in the central crystal core are a large number of melting inclusions . the corundum megacrysts were formed in different periods and different physical chemistry conditions . the crystal core was formed in magma system , and the main parts were formed in inhomogeneously geochemical conditions in which magam and fluid phases coexisted
分析山东昌乐与碱性玄武岩有关的刚玉巨晶不同部位的常量元素、稀土元素及包裹体组成.刚玉巨晶的主体以大量流体?熔体包裹体、锆石、铌(钽)铁矿包裹体为主，而巨晶中的“晶核”部位则以大量的熔体包裹体为主，反映研究区的刚玉巨晶是在不同的阶段形成的.刚玉“晶核”以及“铜皮刚玉”形成于熔体相为主的体系中，而主体刚玉则形成于熔体?流体过渡的急剧变化的不均一的地球化学环境中
It's difficult to find magma system in a sentence. 用magma system造句挺难的