Petrochemical, microelement, rare-earth element data and the character of bimodal volcanic rocks show that the Bikou Group strata were formed in an island arc-rift valley geote ctonic environment.

• 岩石化学、微量元素和稀土元素等一系列图解，都一致判别为碧口群火山岩主要是钙碱系列，也有少量的拉斑系列，并具双峰式火山岩特征。因此，认为碧口群可能形成于岛弧裂谷环境。