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在我国西北的大道尔吉超基性岩体中,岩石的矿物共生组合及成分随岩体部位而变,中部为 Chry+En+Alu 组合;下部为 Fe-Chr+Fo+En 组合。相比之下,玉石沟、白泉和萨尔托海岩体各部位的矿物共生组合虽与之略有差异,但岩体自上而下,橄榄石,斜方辉石和铬尖晶石的成分均遵循相似的变化规律,当两种岩石中橄榄石和斜方辉石牌号相同时,铬尖晶石因成分的不同与斜方辉石的结晶顺序不同,各部位共生矿物橄榄石 Fo 下。与斜方辉石之 En 数值接近。这均说明了阿尔卑斯型超基性岩的岩浆结晶演化过程,并为探索阿尔卑斯型超基性岩的成因、岩体产状以及超基性岩 M/F 值与橄榄石和斜方辉石牌号间的关系提供了依据
In the Dalierji ultrabasic rock mass in the northwestern part of China, the mineral assemblages and compositions of the rocks vary with the parts of the rock mass, with the Chry + En + Alu combination in the middle part and the Fe-Chr + Fo + En combination in the lower part. In contrast, the mineral assemblages of Jadegou, Baizu and Saltohigh rocks are slightly different from each other, but the composition of the olivine, orthopyroxene and chrome spinel All follow similar rules. When the olivine and orthopyroxene are the same in both rocks, the chromite spinel has different crystal order from orthopyroxene due to its composition, and the symbiotic mineral olivine Fo in each part is lower than that in the other parts. Close to the En value of orthopyroxene. All of these illustrate the magmatic evolution of alpine ultramafic rocks. In order to explore the genesis of alpine ultramafic rocks, the occurrence of rock mass and the relationship between M / F value of ultramafic rocks and olivine and orthopyroxene Provided the basis for the relationship