Ing. Minas

Mining Cost Service Section CM Cost Models CONTENTS
Compiled by Scott A. Stebbins, Aventurine Engineering, Inc. Gold Heap Leach Models by Fred A. Leonard Page Hydrometallurgical Mill Models . . . .. . . . CM 92 Placer Mine Models . . . . . . . . . . . . . . . . . . CM 96 Gold Heap Leach Models . . . . . . . . . . . . CM HL1

Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . .. CM 1 Surface Mine Models . . . . . . . . . . . . . . . . . . . CM 2 Underground Mine Models . . . . . . . . . . . . . CM 22 Flotation Mill Models . . . . . . . . . . . . . . . . . CM 72INTRODUCTION
The model mine and mill cost summaries presented here can be used for very rough order-of-magnitude estimates based on limited deposit information. The models are entirely theoretical and do notaccurately represent any existing mining operation. The reader is cautioned against relying too heavily on these or any other models for making significant economic decisions. A cost model, no matterhow carefully prepared, is only a model and should not be expected to represent projected costs for a specific property with any degree of accuracy beyond orderof-magnitude. However, cost models canbe very useful for comparison purposes or for acquisition and exploration decisions, particularly when little is known about an ore deposit. They are commonly INCLUDED • All labor, material, supply andequipment operation costs incurred at the mine or mill site, including supervision, administration and on-site management • Benefits and employment taxes • All on-site development • Mine and millequipment and facilities purchase and installation or construction • Limited haul road construction • Engineering and construction management fees • Working capital • Tailings disposal • • • • • • • • •• • • • • • • • used to establish cut-off grades for preliminary reserve estimates. The surface, underground, and placer mine models were constructed using SHERPA Mine Cost Estimating Software,...