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本文根据野外调查和室内初步研究成果并结合有关地质资料,分析、讨论了荆襄陡山沱组含磷岩系的磷块岩类型、成因和沉积环境。通过分析可知,组成磷块岩的磷灰石有不同的形成方式;磷块岩沉积在海退旋回中粘土和硅质沉积向碳酸盐沉积的转变阶段;磷块岩矿床形成在陆缘海内与深水有联系的浅水地带。 矿区含磷岩系特征综合于图1。
Based on the field investigation and preliminary indoor research and the related geological data, this paper analyzes and discusses the types, genesis and sedimentary environment of phosphate rock in the Doushantuo Formation in Jingxiang. Through the analysis, we can see that the apatites that make up the phosphorite have different forming ways; the phosphorite is deposited in the transitional phase of the middle clay and the siliceous sedimentary to the carbonate deposition; the phosphorous rock is formed in the continental margin Shallow waters linked to the deep water. The characteristics of the phosphate rock in the mining area are summarized in Figure 1.