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通过米仓山地区岩浆杂岩的综合调查研究，采用同源岩浆演化序列理论，首次确认了区内澄江期侵入杂岩的存在。云雾山超单元即为该期早期基性岩浆作用的产物，同位素年龄介于７７６．５～７６６．７Ｍａ之间，由四个单元组成，具富Ｔｉ，Ａｌ，Ｆｅ的特征，其ＳＩ＝４０～１５，ＤＩ＝１１～５６，σ＝１．８～３．７；稀土及微量元素特征均显示具良好的同源岩浆演化特点。原始岩浆温度８５０～１１２５℃，成岩压力约０．７１０～０．７５６ＧＰａ，ｆＯ２≥１０－１１，具幔源为主及壳幔混合源的特征，为早震旦世龙门山—米仓山大陆裂谷作用中期阶段地幔底劈上隆的产物。
Through the comprehensive investigation of magmatite in the Micangshan area, using the same-source magmatic evolution sequence theory, the existence of intrusive complex in the Chengjiang period has been confirmed for the first time. The unit of Yunwu Mountain is the product of the early mafic magmatism during the period. The isotopic age ranged from 776.5 to 766.7Ma and consisted of four units with rich features of Ti, Al, Fe and SI = 40 ~ 15, DI = 11 ~ 56 and σ = 1.8 ~ 3.7. The characteristics of REE and trace elements show that they have the characteristics of homogeneous magma evolution. The original magma temperature 850 ~ 1125 ℃, diagenetic pressure of about 0.710 ~ 0.756GPa, fO2 ≥ 10-11, with mantle-source and crust-mantle mixed source characteristics for the early Sinian Longmen Mountain - Micangshan continental The middle stage of rifting is the product of the splitting of the upper mantle.