贵州开阳县新寨磷矿地质特征及找矿方向

Geological features and prospecting direction of Xinzhai phosphate ore in Kaiyang County,Guizhou Province

本文对新寨磷矿地质特征及控矿因素进行了总结以利于分析找矿方向。矿床位于上扬子地块—黔北隆起区—凤岗南北向隔槽式褶皱变形区,属于有障壁初始台地沉积型矿床。相对于产于无障壁滨岸缓坡环境的矿床,该矿床内矿体厚度偏小,磷矿石品位偏低。震旦系下统陡山沱组为区内主要含矿岩系,该层含矿岩系发育两层工业磷矿体(a层矿、b层矿),矿石工业类型为碳酸盐型。新寨矿区北西部、南东部及北东部具有较为有利的成矿空间,区内找矿潜力大。

In this paper,the author summarizes the geological features and ore-controlling factors of Xinzhai phosphate mine to analyze the prospecting direction.The deposit is located in the Upper Yangtze Block,North Guizhou uplift area and Fenggang northsouth trough-type fold deformation area,belonging to the barrier initial platform sedimentary deposit.Compared to the deposit in the environment of gentle slope without barrier,the ore body thickness in this deposit is smaller and the grade of phosphate ore is lower.The Lower Sinian Doushantuo Formation is the main ore-bearing rock series in the area.Two layers of industrial phosphate rock bodies(Layer a and Layer b)are developed in the ore-bearing rock series.The ore industry type is carbonate type.The northwest,southeast,and northeast parts of Xinzhai mining area have favorable ore-forming space,and there is great prospecting potential in the area.