Conservation of Mineral Resources |
Contents
THE DETERMINANTS OF MINERAL OUTPUT | 40 |
III | 128 |
Changes of Risk Over Time | 159 |
11 other sections not shown
Common terms and phrases
alternative rates amount average cost bituminous coal capital cent Chapter coal conservation copper cost equals marginal covery demand depletion duction economic economic rent effect efficiency equals marginal revenue estimated example exhaustion extraction factors factors of production FIGURE fixed costs flask high grade higher Hoskold increase individual industry interest rate investment lead least less level of recovery loss low grade low-grade lower grade marginal cost equals maximum present value mercury mill mineable mineral deposits mineral resources molybdenum monopoly natural resources open-pit mining operating costs optimum rate orebody partly plant capacity problem rapid mining rate and level rate of output rate of profit rate of recovery rate-variable ratio recovered reduced reserves result richer rise risks of mining scale selective mining short run short tons social submarginal sunk costs supply tion tonnage tons per day Tri-State district uncertainties variable costs waste workable yield zinc