Abstract
Commonly employed ore-reserve estimation techniques, such as the polygon method and inverse distance weighting, use a weighted average of samples. The weighting coefficients are a function of the mining blocks in the deposit, but they shed no light on the variability of the orebody. Furthermore, these techniques do not allow a determination of the reliability of the estimates, but geostatistical estimation techniques allow a calculation of the measure of the error associated with the estimates. It is possible to find weighting coefficients for a given mining block and also data configuration that minimizes this error. This research describes a geostatistical evaluation of the Tulovasi borate deposit situated between the village of Osmanca and the Simav River in Bigadic, Balikesir (Turkey), The study begins with an analysis of composition; drillhole samples of variable length were aggregated to yield equal-length samples. Four hundred thirty-three composite samples show a mean of 26.67% B2O3 with a varianc...
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