GEOSTATYSTYCZNA OCENA ZMIENNOŚCI ZAWARTOŚCI I WYDAJNOŚCI WĘGLA ORGANICZNEGO W ZŁOŻACH CU LGOM

Abstract

GEOSTATISTIC ESTIMATION OF THE VARIABILITY OF ORGANIC CARBON CONTENTS AND ACCUMULATION INDEX VALUES IN COPPER DEPOSITS OF THE LUBIN COPPER DISTRICT, POLANDAbstract. The forms of organic carbon occurrence in copper ore from the Lubin Copper District, Poland and the role of organic carbon in copper recovery technologies were characterized. Variability of organic carbon contents and accumulation index values in various types of copper ore were described in terms of geostatistic methods and variability structure of these parameters was recognized with the application of Matheron's geostatictics. Evaluation of reserves estimation errors was carried on with geostatistic modelling of semivariograms for calculation blocks of various sizes. It was found that precise estimation of organic carbon reserves is impossible for small blocks due to high variability of C/org. accumulation index. Satisfactory results of reserves estimations (i.e. errors median <20%) were obtained for large calculation blocks: 2 x 2 km for the Kupferschiefer ore and 5 x 5 km for both the dolomite and sandstone ores.