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Geostatistical support for categorization of metal ore resources in Poland

Author

Listed:
  • Mucha Jacek

    (Professor, AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland)

  • Wasilewska-Błaszczyk Monika

    (Ph.D. Eng., AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland)

Abstract

The authors attempted to introduce some components of the Australasian JORC Code system to the categorization of Polish Cu-Ag and Zn-Pb ore resources. The proposed geostatistical method of resource categorization applies two criteria: continuity of deposit parameters described by semivariograms and permissible, relative standard error of resources estimation determined with the ordinary kriging procedure. Considering the first criterion, we propose the following values of autocorrelation coefficients, which define the ranges (distances) of the resources categories around the measurement sites (e.g., exploration wells): “measured” category (A + B in the Polish system) – the values of the autocorrelation coefficient from 1 to 2/3, “indicated” category (C1 in the Polish system) – the values of the autocorrelation coefficient from 2/3 to 1/3, “inferred” category (partly C2 in the Polish system) – the values of the autocorrelation coefficient from 1/3 to 1/20, “out-of-doors” category (partly D in the Polish system) – the values of autocorrelation coefficient from 1/20 to 0.

Suggested Citation

  • Mucha Jacek & Wasilewska-Błaszczyk Monika, 2015. "Geostatistical support for categorization of metal ore resources in Poland," Gospodarka Surowcami Mineralnymi / Mineral Resources Management, Sciendo, vol. 31(4), pages 21-34, December.
    • Handle: RePEc:vrs:gosmin:v:31:y:2015:i:4:p:21-34:n:3
    DOI: 10.1515/gospo-2015-0035
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