Delineation of ore occurrences in ore reserves appraisal with Micromine package

The ore quality requirements include: cutoff grade, minimum thickness of ore body, maximum permissible thickness of interbeds of barren rocks or offgrade ore within the ore body perimeter, minimum metropercent (metrogram) calculated as the product of cutoff grade and minimum ore body thickness. Recently, mineral reserves appraisal has put in practice automation within specialized programs of geological-surveying data processing. The principal subject in automation of ore occurrence delineation in Micromine package and the topic of this article is delimitation of an ore body across its thickness using the data from the ore quality requirements. This becomes necessary when geological data on external boundaries are absent, which is typical of variable morphology ore bodies: mineralized dikes and zones, ore folds, skarns, ore chimneys, etc. Previously, before this study, Micromine package implemented appraisal of composite material reserves in the following scenarios: along boreholes, by benches, by intervals, by geology, by content...