Саопштење са скупа штампано у изводу

објављена

енглески

Nebojša Atanacković, Vladimir Živanović, Jana Štrbački, Veselin Dragišić, Ivana Cvejić

Hydrochemical indicators of groundwater flow in the area of “Čukaru Peki” Cu-Au underground mine in eastern Serbia

5th IAH CEG conference

Mihael Brenčič, Petra Žvab Rožič, Anja Torkar

Slovenian Committee of International Association of Hydrogeologists - SKIAH

2022

The physical and chemical properties of groundwater, together with the groundwater levels regime and rock hydraulic
properties, are often used to understand and conceptualize the hydrogeological system. Prediction of the influence of
mining works on groundwater, and vice versa, is a challenge due to significantly altered groundwater flow patterns in
the raw materials exploitation areas in relation to natural conditions. Therefore, multiple parameters are assessed and
monitored before and during exploitation to properly characterize and quantify the system for assessing groundwater
inflows-dewatering needs, environmental impacts, and water balance. In the present study, a set of 200 groundwater
quality analyses are used to determine the main water types and delineate characteristic parameters for tracing the
groundwater origin and flow in the area of the Čukaru Peki mine.
The ”Čukaru Peki” is a world-class copper and gold deposit discovered in 2012 in the vicinity of the “Bor” mining
complex in eastern Serbia. The deposit consists of two major zones, the Upper massive sulphide zone and the Lower
porphyry zone, at the depths from 400 to more than 2300 m below ground surface. The ore bodies are hosted in the
Upper Cretaceous (UC) andesite and volcanoclastic, overlain by the UC and Miocene age clastic cover, with multiple
faults identified in the area. The exploitation began in 2021, following the development of the main ore access infrastructure
(twin decline and two shafts). The groundwater samples were collected before commencement and during
the exploitation. The samples from UC and Miocene clastic sediments are pH neutral, low mineralization, Ca2+-HCO3
-
water. Samples from the volcanic rocks show considerable variations depending on the location and depth of sampling.
Evolution in chemical composition from Ca2+-Mg2+-HCO3
--SO4
2- type in “fresh” andesite toward Na+-SO4
2--HCO3
- water
in altered andesite is identified. Further analysis included the application of multivariant statistical methods (namely
Hierarchical Cluster Analysis and Discriminant Analysis) to delineate characteristic parameters and grouping of the
samples. Ultimately, distinguished parameters are used for determining the origin of groundwater collected from underground
adits and shafts.
The research demonstrated the application of statistical methods to a set of groundwater quality parameters for tracing
the origin of inflows into underground mining works.

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14

978-961-95960-0-5

Bor, Srbija

mine water, hydrogeology, multivariant statistics, groundwater inflow, water quality

123685123

https://www.geo-zs.si/IAHCEG2022/wp-content/uploads/2022/10/IAH-CEG_2022_eBookOfAbstracts.pdf

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