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云南省磷矿资源十分丰富,它是产于早寒武世初期的磷块岩矿床,主要分布于滇东地区。这类海相沉积的磷块岩矿床,其形成和发育,明显受当时沉积古地理环境的制约,反映在含磷岩系的岩性、厚度变化,磷矿层赋存层位,层理特征,陆源矿物含量和小壳动物化石,矿石的物质组分、结构构造等方面。在垂直序列上表现出磷块岩沉积于由海进→海退→海进的旋回历程中,而富磷块岩往往出现在海退阶段的中后期,这说明成磷海盆的含磷浓度在时间上是由淡化→浓缩→再淡化的演变过程;在空间上反映出含磷岩系是平行海岸线呈带状分区的特点。这些带状分区的形成,主要是海水含磷浓度的差异,其次才是海水动力条件,氧化还原电位、水介质的酸碱度以及陆源碎屑的掺合等因素。而磷质的来源主要是生物与生物活动的循环。有利于含磷度浓缩的条件,一是相对稳定和闭塞的海盆,二是适宜的气候条件。滇东早寒武世初期的沉积古地理环境,正好是一个相对稳定和闭塞的海湾泻湖和滩间泻湖,加之气候条件适宜,从而形成了矿石质量好、规模巨大的磷块岩矿床。
Yunnan Province is rich in phosphate rock resources, it is produced in the early Cambrian phosphorous rock deposits, mainly in the eastern Yunnan region. The formation and development of these marine-deposited phosphorite deposits are obviously controlled by the sedimentary palaeogeomorphology at that time, which is reflected in the changes of lithology and thickness of the phosphorous-bearing rock series, the stratigraphic features and the stratigraphic features , The terrigenous mineral content and the fossil of the small shell animal, the material composition of the ore, the structural structure and so on. Phosphorite sediments are shown in the vertical sequence in the cycle from seaward → seaward → seaward, whereas the phosphorus-rich rocks tend to occur in the middle and late stages of the sea-regressive phase, indicating that the phosphorus concentration in the phosphate-bearing sea basin is between The time is from the evolution of the desalination → concentration → desalination; spatial reflection of the phosphorus-bearing rock series is parallel to the shoreline zonal zoning characteristics. The formation of these zonal zoning is mainly the difference of phosphorus concentration in seawater, followed by seawater kinetic conditions, oxidation-reduction potential, pH of aqueous media and blending of terrigenous debris. The source of phosphorus is mainly the biological and biological activity cycle. Conducive to the concentration of phosphorus-containing conditions, one is relatively stable and blocked the basin, the second is the appropriate climatic conditions. The sedimentary paleogeographic environment in the early period of Eastern Cambrian in the eastern Yunnan is exactly a relatively stable and occluded bay lagoon and beach lagoon, combined with suitable climatic conditions, thus forming a phosphate rock deposit with good quality and large scale.