Abstract: The outline for this talk is: 1. Problem: Compositional data in geochemistry and mining Geostatistical modeling 2. Solution: Sequential Binary Partition ilr balances 3. Effect of compositional approach on economy of reserves: Tonnage and mean grade Ore classification Model validation 4. Spurious correlation in log-ratios: Pearson, Spearman, etc. Heatmaps 5. Open discussions: Treating high dimensional datasets (D>20) … Hossein Molayemat - PhD Student, Department of Mining and Metallurgical Engineering, Yazd University, Iran - Visiting Student, Department of Informatics, Applied Mathematics and Statistics, University of Girona, Spain