宁夏磷矿成矿特征及分布规律探析

Analysis of characteristics and distribution for phosphate mineralization in Ningxia

宁夏磷矿主要分布在贺兰山区,经过勘查的矿区共3个,研究表明,磷矿产于寒武系辛集组(xj)底部地层之内。由磷矿层及其顶板中细砂岩组成。属滨海-浅海相含磷建造。磷块岩成层状,自下而上可分为三种类型:砾状磷块岩、砂质磷块岩及钙质磷块岩,矿石呈碎屑结构、鲕状结构,块状构造。矿体呈层状产出,属缓倾斜矿层,与上下围岩的层位关系一般较稳定。磷矿物为胶磷矿,矿物颗粒细、嵌布紧密。综合分析认为矿床类型为沉积成因型层状矿床。

Phosphate rock is mainly distributed in the Helan mountain in ningxia region.Through the exploration of the mining area, a total of three.The study show that Phosphate rock from the bottom of the Cambrian xinji formation. Composed of phosphate rock layer and its fine sandstone in the roof. Binhai ：- neritic facies phosphorus is built. The Phosphate rock appeared with layered. Bottom-up can be divided into three types： brecciated phosphate rock, phosphate rock and sandy calcareous phosphate rock. Ore clastic structure oolitic structure, block structure. Bedded ore bodies, is gently inclined seam, with the upper and lower rock layers are generally more stable relationship. Phosphate material is collophanite, fine mineral particles, embedded cloth tightly. Comprehensive analysis think ore deposit types of sedimentary origin of layered deposits.