Research paper by SMG MSc student of Mining Engineering, Yerniyaz Abildin under the supervision of the faculty member of SMG, Dr. Nasser Madani, entitled “A Hybrid Approach for Joint Simulation of Geometallurgical Variables with Inequality Constraint” has been published in an international high qualified peer-reviewed journal “Minerals” for the first time. Impact factor of this journal is 1.835, which is classified as Q2 in category of MINING & MINERAL PROCESSING based on Web of Science report. This paper belongs to the Special Issue Geometallurgy. The main idea of this paper is related to introducing a geostatistical approach for defining the geometallurgical domains in copper deposits that is applicable in subsequent analysis in a mining project such as mine planning and mineral processing.