Analysis of original elemental concentrations and their changes in the formation can provide important guide to the investigation of depositional environment.
通过分析地层中原始沉积的元素含量与变化规律，建立与环境变化的相互关系，可以为研究沉积环境提供重要线索。
Based on analysis of the metallogenic environment, this paper rebuilts the depositional evolvement model of Yixian sea basin.
通过分析矿床的形成环境，建立了易县海盆沉积演化模式。
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