عنوان مقاله [English]
This research deals with the spatial simulation of rock types and the assessing the uncertainty in the domain boundaries in Golgohar Sirjan iron deposit. Based on truncated Gaussian simulation, a simulation approach is proposed to this end, in which the geological units are reproduced by examining the nature of geological boundaries and vertical and horizontal instability. For this purpose, at first, contact analysis is used to investigate the transition in the grade distribution when crossing a rock type boundary. In the next step, the drill holes data are divided into two domains according to the contact analysis results. The first domain includes top magnetite and oxide zone, and the second domain includes bottom magnetite. Next, the local probabilities model is reproduced based on the vertical proportion matrix (VPM). Finally, different stochastic realizations of rock type units are reproduced by using the improved truncated Gaussian simulation algorithm. In this proposed algorithm, soft (probabilities) and hard data played an equal role in the simulation process. The results show the capability of the proposed algorithm to reproduce the single-point statistics, two-point statistics, and the connectivity values obtained by the hard data.