Ore Reserve Estimates in the Real World

  • Огноо: 2012-11-28 - 2012-11-30 | Зохион байгуулагч: Society of Economic Geologists | Байршил: SEG Course Center | Littleton, CO, USA | Вэбсайт: www.segweb.org

This workshop will present an overview of sediment-hosted Zn-Pb-Ag ores from syngenetic and diagenetic environments to high temperature carbonate replacement with a strong emphasis on exploration.

The reserve estimates that form the basis for final feasibility studies leading to the construction of a mine are, to a greater or lesser degree, almost invariably wrong. Unfortunately, the error is in only one direction. The tonnage of ore mined may exceed the tonnage predicted by the “feasibility reserve,” but the grade of ore actually mined is almost invariably lower than the grade envisioned in the feasibility study. As a result, the financial profitability of the operation very rarely meets the feasibility forecast. This course is NOT a course in financial evaluation or geostatistics, although both of these subjects are discussed, nor is it a collection of “cookbook” recipes for reserve estimation. It is intended as a discussion of various aspects of reserve estimation that are often neglected in the real world, and which contribute to the above situation. Various exercises, mostly based on actual operations, are presented to illustrate points important to the evaluation of any mineral deposit. The course will be of interest to geologists dealing with the practical aspects of reserve estimation and mining engineers, as well as to decision-makers in economic geology in general. Course materials will include a copy of the latest edition of SEG’s consistently well-received Special Publication Number 3 Ore Reserve Estimates in the Real World, by John G. Stone and Peter G. Dunn.