Recognition and consideration of “bonanzas” in calculation of ore deposit reserves

The “too-high” (bonanza) assays of gold ores, e.g., may be identified and the errors caused by them in estimations of gold content of ore blocks may be minimized by means of flexible cut-off (fig. 3) and appropriate substitutions, depending on grade of ore, number of assays available for the estimations, and other variables. – IGR Staff.