| 离子吸附型稀土矿储量动态估算方法(RiRee)及其拓展运用 |
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| 关键词:ion-adsorption type rare earths dynamic reserves estimation method (RiRee) 3D geological model price-grade model Kirging method |
| 基金项目:中国地质调查局地质大调查项目“国内外三稀资源信息集成”(编号: 1212011220807);“矿产资源储量动态监管系统维护与保障程度动态分析系统建设”(编号: 12120113079500);“华南重点矿集区稀有稀散和稀土矿产调查”(编号: DD20160056);“中国矿产地质与成矿规律综合集成和服务”(矿产地质志)项目(编号: DD20160346); 国家自然科学基金项目“江西某地离子吸附型稀土矿床元素地球化学行为及成矿机理”(编号: 41303035); 中国地质科学院基本业务费项目“赣南变质岩离子吸附型稀土矿成矿规律与找矿方向研究”(编号: YYWF201527) |
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| Ion-adsorption Type Rare Earths Dynamic Reserves Estimation Method (RiRee) and Its Application |
| During the exploration of rare earth deposits in southern China, the traditional method of geological block is used to estimate the reserves, which, however, has shortcomings of high prospecting work load, expensiveness and low efficiency. The rare earth resources contain 17 different rare earth elements, different element market prices show remarkable differences, and the existing rare earth oxides based on the total industrial indicators can hardly be quickly applied in the mine, resulting in the fact the ore lower than usable reserves may actually in production, and the ore higher than usable reserves can not be economically used. Based on the characteristics of ion - adsorbed rare earth deposits and the Kriging method for soil geochemical exploration, a three - dimensional model for estimating the reserves of ion - adsorbed rare earth deposits and its corresponding evaluation methods are developed, called RiRee. The model and method not only can estimate the volume and grade of the “sample point” in the weathering shell, but also are directly related to the market price, and can also determine the boundary grade and the industrial grade according to the dynamic change of the daily market price. A daily updated resource reserve benefits the mine economy. Using this model, the authors carried out demonstration in different ion adsorption rare earth mines in southern Jiangxi, western Yunnan and Zhejiang provinces, and achieved good results. The results show that the volume calculated by Kriging method is comparable with that calculated by the traditional manual method, and the result of calculation is reasonable and has the characteristics of rapidness accuracy and convenience. On the basis of the self-developed digital mine economic evaluation system based on the Kriging method (mainly the price-boundary grade sensitivity analysis module), the boundary grade is dynamically set, and the boundary of economically exploitable orebodies varies with different single element prices. When the market price of rare earth concentrate changes, we can quickly correct the break-even point through the software system, and change the border grade at any time, thus dynamically determining the spatial range of economically recoverable orebody for the rational arrangement of mining engineering. The results obtained by the authors provide a scientific basis for the reasonable and efficient development and utilization of the ion adsorption type rare earth mineral resources (especially heavy rare earth). |
| ZHAO Ting,WANG Deng-hong,WANG Rui-jiang,SUN Yan,YANG Yue-qing,DENG Mao-chun,FENG Wen-jie.2017.Ion-adsorption Type Rare Earths Dynamic Reserves Estimation Method (RiRee) and Its Application[J].Acta Geoscientica Sinica,38(3):326-334. |
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