GEOSTATISTICS OF THE DISTRIBUTION OF IRON GRADE IN THE BAIMA TITANOMAGNETITE DEPOSIT, SICHUAN PROVINCE
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摘要: 以白马钒钛磁铁矿区及及坪矿段为研究对象，通过对矿体主要区域化变量矿石铁品位半变异函数的分析，建立了相应的半变异函数的球状模型，从而求得主矿体在走向、倾向以及垂直3个方向上的块金值、变程等参数.根据这些参数，求得白马铁矿床及及坪矿段铁品位变化程度系数在走向、倾向与垂直方向均小于0.3，表明矿区成矿作用单一，矿化较均匀，有利于矿山的开采，并且统计得出铁品位属于正态分布，表明下一步用普通克立格法进行估值效果最好，为矿山规划设计和生产提供了理论依据.Abstract: The semi-variation function of iron grade of the Jijiping ore block of Baima titanomagnetite deposit is analyzed by the major regionalized variables. The corresponding spherical model of semi-variation function is established. The parameters of C0 and variances on strike, dip and vertical directions are obtained. The variation coefficients of iron grade in the Jijiping ore block are lower than 0.3, indicating that the mineralization of the orefield is simple and uniform, which is beneficial to mining. According to the statistical analysis, the iron grades display normal distribution, showing that an estimation of ordinary kriging is better than other methods in further research. This investigation provides a theoretical basis for mining planning and production.
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Key words:
- geostatistics /
- semi-variant function /
- distribution of iron grade /
- Sichuan Province
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