贵州省磷矿品位-吨位模型的建立及其地质意义

Grade-Tonnage Models for the Phosphate Deposits in Guizhou Province and Their Geological Significance

利用2009年贵州省矿产资源利用现状调查磷矿成果数据库,以核查块段为基础,通过块段品位和块段资源储量数据对全省磷矿核查矿区平均品位统计,掌握了全省核查矿区高中低品位磷矿石的分布,并对块段品位数据区间分段统计吨位频率,建立了寒武系磷矿层和震旦系磷矿层品位-吨位模型。统计结果表明,寒武系磷矿层的矿区平均品位总体较低,震旦系磷矿层矿区平均品位总体较高,全省磷矿吨位频率服从正态分布,寒武系磷矿层吨位峰值区间较窄,震旦系磷矿层吨位峰值区间较宽。综合研究表明,开阳-息烽片区和瓮安-福泉片区震旦系磷矿层高品位矿石资源储量多,矿石质量好,可作为全省磷矿资源开发利用布局的重点地区,铜仁-松桃片区和清镇-织金片区寒武系磷矿层品位低、贫矿石资源储量多,矿石质量差,应加强低品位矿石和贫矿石的选矿技术研究。

Based on the phosphate deposit database in Guizhou compiled in 2009,this study calculates the average grade of the phosphate ores using block grade and block reserve data taking the verified blocks as units. We determine the phosphate ores distribution of high, middle and low grades, make statistics of their tonnage frequency, and establish grade-tonnage models for the Cambrian and Sinian phosphate rock layers. The results show that the aver- age grade for ores from the Cambrian phosphate rock layers is lower than the Sinian layers. The frequency of their tonnage obeys a normal distribution, and the tonnage peak interval is much narrower in phosphate rock layers than the Sinian layers. The study indicates that the Kaiyang-Xifeng and Weng＇ an-Fu-quan areas can be considered as the key areas of development and utilization, and the mineral separation technology should be improved to solve the prob-lems of low grade, poor quality but big resource reserve of phosphate ores in the Tongren-Songtao and Qingzhen-Zhijin areas.