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THE METHODOLOGY OF DEFINING GEOCHEMICAL DOMAINS IN CU-AG DEPOSIT (THE LUBIN-GLOGOW COPPER DISTRICT, POLAND)

M. Wasilewska-Blaszczyk, M. Dudek, J. Mucha
Thursday 11 October 2018 by Libadmin2018

ABSTRACT

The Cu-Ag deposit exploited in the Lubin-Głogów Copper district (LGCD) in Poland is located in the Permian Rotliegend (sandstones) and Zechstein (shale and carbonate rocks) formations. The three main lithological series are not internally homogenous; within them, a total of 16 individual lithological units can be determined. The differentiation between lithological, mineralogical and geometallurgical ore properties is a criterion used to distinguish between main and individual lithologies in the deposit area. A systematic collection of chip samples in mine workings is carried out separately for each individual unit in the vertical profile with horizontal spacing of 20 m. The Cu content is determined for each of the collected samples. When it comes to the main lithological units, significant differences in the average content of the main metals (Cu, Ag) and accompanying elements (e.g. Pb, Co, and Zn) are observed. The use of classical statistical methods allowed examining geochemical similarities between individual units separately for each main lithological unit. For this purpose, the compatibility of empirical distributions, the equality of medians, and the average contents of Cu in individual lithological series were examined. The test results allow combining some of individual units into a single geochemical domain. Such a procedure significantly simplifies and facilitates the 3D geological modeling of the deposit.

Keywords: key Cu-Ag deposit, Fore-Sudetic Monocline, statistics, geochemical domain


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