Application of Three-Dimensional Direct Least Square Method for Ellipsoid Anisotropy Fitting Model of Highly Irregular Drill Hole Patterns

Ellipsoid or geometric anisotropy is a widely used method in geostatistical analysis to obtain variograms with different ranges directions (azimuth) and relatively similar sill variance. indispensable mining when resource geologist intends understand the spatial continuity of variables related any geological controls mineralization. For example, dealing mineralization tabular deposits, porphyritic deposit an irregular drill hole pattern (fan drilling), three-dimensional ellipsoid quite challenging model. We assume that variables’ isotropic, we model it using omnidirectional variogram. However, if actual has anisotropy, then assuming variogram will generate imprecise estimations. This study presents new practical model-fitting direct least square method. investigated zinc (Zn) dataset from thousands patterns system associated skarn orebodies for case study.