Abstract
Variograms for gold and lead values from the Loraine and Prieska mines, respectively, indicate that data outliers can seriously distort and/or mask the real variogram patterns. Studies show that this problem is best overcome for these mines by logarithmic transformation of the data, and/or a suitable screening out of such outliers, and/or more robust variogram estimation procedures; the benefits are particularly significant when the basic data is limited.
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References
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Krige, D.G., Magri, E.J. Studies of the effects of outliers and data transformation on variogram estimates for a base metal and a gold ore body. Mathematical Geology 14, 557–564 (1982). https://doi.org/10.1007/BF01033879
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DOI: https://doi.org/10.1007/BF01033879