Their role is to delineate ore from waste so that a cost-effective mine plan can be implemented on a mine-site. Responsibilities include geologically mapping the ore body, its boundaries and variability, and performing what is known as a mineral inventory of the deposit, or a full picture of the grade and tonnage of the deposit. As such, and extending this ‘’picture” in three dimensions via drill holes & other sampling methods, they will guide and evaluate that exploration and discovery process. Over the life of a mine, they will also help extend the known boundaries of any additional ore by developing a geological model of the deposit, looking for clues & evidence for additional opportunities for expansion and valuable minerals while always looking for any extra elements and minerals that may make the mine more profitable and viable.