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This fully updated textbook is intended for the economic geologist who deals with the evaluation of deposits at an early stage of development. It offers rules for quick and easy calculations based on the application of approximate data. It provides both the student and the geologist in the field with a complete set of rules and methods enabling them to perform a quick initial evaluation of the deposit without the support of specialists or computers - even if he is left to his own resources. All rules for calculations are illustrated with examples, and mistakes and pitfalls the authors encountered during their careers are pointed out.

Economic Evaluations in Exploration

Conversions.- First Estimates of Grade and Tonnages and Potential Grade and Tonnages.- Dealing with Data of Multi-Element Deposits.- Conversion of Geological Data into Mining Data for Ore Deposits.- to Economic Evaluations.- Metal Prices.- Calculation of the Net Smelter Return (NSR) of a Mine.- Production Lifetime.- Calculation of Cost Data.- Additional Economic Planning Methods.- Economic Evaluations.- Quantitative Valuation of Exploration Projects without Known Mineralization.- Comparison of Deposits.- Calculating Growth Rates.- Equity Calculations.