Xidashan Formation is a upward shallowing sedimentary sequence, whose sedimentary environment changed from bathyalenvironment to fore-platform slope.
西大山组是一个向上变浅的沉积序列，沉积环境由次深海过渡为台前斜坡；
2
The metallogenetic environment is a closed bathyal-abysmal basin and the metallogenetic setting is a rifting with characteristics of "ocean basin evolution".