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Impact of Zn-Pb mining in the Olkusz ore district on the Permian aquifer (SW Poland).

Motyka J, Postawa A - Environ Sci Pollut Res Int (2013)

Bottom Line: Long-term extensive mining of Zn-Pb ores in the Olkusz area resulted in significant changes of water table levels and chemical composition of water in all aquifers in this area.Short-term effect was freshening in the zones of contact with overlying the Triassic limestones and dolomites.As a result of all these processes, hydrochemical type of water shifted from multi-ion types with various combinations of ions towards higher shares of sulphates, calcium and magnesium.

View Article: PubMed Central - PubMed

Affiliation: AGH University, Al. Mickiewicza 30, 30-059, Krakow, Poland, motyka@agh.edu.pl.

ABSTRACT
Long-term extensive mining of Zn-Pb ores in the Olkusz area resulted in significant changes of water table levels and chemical composition of water in all aquifers in this area. Within the Permian aquifer, hydrochemical type of water evolved in two general stages. Short-term effect was freshening in the zones of contact with overlying the Triassic limestones and dolomites. Long-term effect was a change in flow pattern and, as a consequence, an inflow of naturally altered and antropogenically contaminated water from the Triassic aquifer into the Permian complex. This was especially intensive in densely fissured and fault zones. As a result of all these processes, hydrochemical type of water shifted from multi-ion types with various combinations of ions towards higher shares of sulphates, calcium and magnesium.

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Changes in TDS and chloride concentration in water from inflow no 243
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Fig4: Changes in TDS and chloride concentration in water from inflow no 243

Mentions: The majority of inflows in the eastern part of the Pomorzany mine became inactive in the natural way in the period from a dozen or so hours up to a few months. Others were stopped by tight linings used in galleries. Few of them were active for longer periods of time, thus observation of the evolution of their chemical composition was possible. A good example is an inflow from an exploratory borehole no 243 which was monitored from 1972 to 1982. Initially, the mineralisation was 7.6 g/L. During the first year after drilling, TDS decreased to 1.1 g/L; then in the consecutive year, an increase in 1.7 g/L was noticed. This value remained approximately constant till the end of observation period. TDS and chloride concentration may serve as indicators of the changes in chemical composition of water from this inflow (see Fig. 4).Fig. 4


Impact of Zn-Pb mining in the Olkusz ore district on the Permian aquifer (SW Poland).

Motyka J, Postawa A - Environ Sci Pollut Res Int (2013)

Changes in TDS and chloride concentration in water from inflow no 243
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3824222&req=5

Fig4: Changes in TDS and chloride concentration in water from inflow no 243
Mentions: The majority of inflows in the eastern part of the Pomorzany mine became inactive in the natural way in the period from a dozen or so hours up to a few months. Others were stopped by tight linings used in galleries. Few of them were active for longer periods of time, thus observation of the evolution of their chemical composition was possible. A good example is an inflow from an exploratory borehole no 243 which was monitored from 1972 to 1982. Initially, the mineralisation was 7.6 g/L. During the first year after drilling, TDS decreased to 1.1 g/L; then in the consecutive year, an increase in 1.7 g/L was noticed. This value remained approximately constant till the end of observation period. TDS and chloride concentration may serve as indicators of the changes in chemical composition of water from this inflow (see Fig. 4).Fig. 4

Bottom Line: Long-term extensive mining of Zn-Pb ores in the Olkusz area resulted in significant changes of water table levels and chemical composition of water in all aquifers in this area.Short-term effect was freshening in the zones of contact with overlying the Triassic limestones and dolomites.As a result of all these processes, hydrochemical type of water shifted from multi-ion types with various combinations of ions towards higher shares of sulphates, calcium and magnesium.

View Article: PubMed Central - PubMed

Affiliation: AGH University, Al. Mickiewicza 30, 30-059, Krakow, Poland, motyka@agh.edu.pl.

ABSTRACT
Long-term extensive mining of Zn-Pb ores in the Olkusz area resulted in significant changes of water table levels and chemical composition of water in all aquifers in this area. Within the Permian aquifer, hydrochemical type of water evolved in two general stages. Short-term effect was freshening in the zones of contact with overlying the Triassic limestones and dolomites. Long-term effect was a change in flow pattern and, as a consequence, an inflow of naturally altered and antropogenically contaminated water from the Triassic aquifer into the Permian complex. This was especially intensive in densely fissured and fault zones. As a result of all these processes, hydrochemical type of water shifted from multi-ion types with various combinations of ions towards higher shares of sulphates, calcium and magnesium.

Show MeSH