3D Anisotropic Modeling of Grade in Vein Deposits Based on Thickness and Distance

Study of vein deposits، as the smallest exploration target is a challengeable affair involving uncertainty. In this research، a three-dimensional model is presented based on thickness، distance and grade parameters of the veins. In the vein-type deposit modeling، two approaches can generally be assumed: first، ore-forming fluid moves from vein to host rock; in this case، whatever the vein is thicker، the enriched host rock has more grades. In the second case، the ore-forming fluid moves from the host rock to vein that thicken veins are more depleted host rocks. In the Emarat vein-type deposit، the ore-forming metals depletion occurs in the host rocks with increasing the thickness of vain. In this study، the maximum range and parameters of the anisotropic search ellipsoid are calculated with respect to a logarithmic relation between grade and distance of the vein. The Zn grade of each spatial location is estimated into foot-wall and hanging-wall vein by three-dimensional modeling of grade distribution، thickness، and distance of the vein.