Xidashan Formation is a upward shallowing sedimentary sequence, whose sedimentary environment changed from bathyal environment 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；
The metallogenetic environment is a closed bathyal-abysmal basin and the metallogenetic setting is a rifting with characteristics of "ocean basin evolution".
成矿环境为半深水一深水局限盆地，成矿背景是以“洋盆化”为特征的裂谷作用。
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