根据昌乐火山岩结晶程度差、成分分异大、显微镜下难以鉴定岩石类型等特点，运用两种岩石化学计算法对团山子、苍山、临朐等火山口熔岩岩样进行了计算和分析，结合岩石薄片资料，确定了其矿物组合和岩石类型．研究表明，不同类型火山岩的岩石化学特征存在着差异，这种差异可能影响岩石矿物的结晶程度，在相同温度和压力下，基性程度偏高的岩浆，其结晶程度偏好． Based on the characteristics of poor crystallinity, large component differentiation and difficult identification of rock types under microscope, two types of rock chemistry calculations were used to calculate and analyze the lava samples from the volcano crater such as Tuan Shan Zi, Cang Shan, Sheet data, to determine its mineral assemblage and rock type. The results show that there are differences in the petrochemical characteristics of different types of volcanic rocks. This difference may affect the degree of crystallization of rock minerals. In the same temperature and pressure, the higher basicity magma, the degree of crystallization is preferred.