KarstBase a bibliography database in karst and cave science.
Featured articles from Cave & Karst Science Journals
Characterization of minothems at Libiola (NW Italy): morphological, mineralogical, and geochemical study, Carbone Cristina; Dinelli Enrico; De Waele Jo
Chemistry and Karst, White, William B.
The karst paradigm: changes, trends and perspectives, Klimchouk, Alexander
Long-term erosion rate measurements in gypsum caves of Sorbas (SE Spain) by the Micro-Erosion Meter method, Sanna, Laura; De Waele, Jo; Calaforra, José Maria; Forti, Paolo
The use of damaged speleothems and in situ fault displacement monitoring to characterise active tectonic structures: an example from Zapadni Cave, Czech Republic , Briestensky, Milos; Stemberk, Josef; Rowberry, Matt D.;
Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
Acta Petrologica Sinica, 2004, Vol 20, Issue 4, p. 887-898
Groundwater chemical composition changes in the Dubravsky Massif hydrogeological structure, induced by magnesite exploitation
Bajtos P,
Abstract:
Exploited magnesite bodies of the Dubravsky Massif create parts of karst-fissure aquifer confined by Carboniferous metamorphic rocks of low fissure permeability. Extensive mining progress caused considerable changes in both groundwater circulation and groundwater chemical composition of the aquifer. A model of groundwater chemical composition genesis in such complicated conditions is presented in this paper. Saturation indices (SI) for chosen minerals were computed based on speciation modelling, which indicate oversaturation of groundwater with magnesite, dolomite, calcite, and undersaturation with gypsum in all saturated zone of karst-fissure aquifer. Statistical interpretations of hydrochemical data suppose that anthropogenically unaffected groundwater, where mineralisation is slightly altered by pyrite oxidation in dolomitic environment, represents hydrogeochemical background within the aquifer. It is supposed, that azonic acid, generated by condensation of nitrogen-rich gases freeing by blast-firings in mine, accelerate magnesite and dolomite dissolution. Produced groundwater types are of higher content of NO3, Mg and TIC in comparison with background values. Estimated acceleration of karstification processes due to underground mining is about 1.5 times. In spite of detected contamination, threshold values of drinking water standard, given by the Edict of the Slovak Ministry of Health Care No. 29 / 2002 Z. z. are not markedly exceeded for tested parameters. Future possible exploitation of studied aquifer after mining termination is not excluded
Exploited magnesite bodies of the Dubravsky Massif create parts of karst-fissure aquifer confined by Carboniferous metamorphic rocks of low fissure permeability. Extensive mining progress caused considerable changes in both groundwater circulation and groundwater chemical composition of the aquifer. A model of groundwater chemical composition genesis in such complicated conditions is presented in this paper. Saturation indices (SI) for chosen minerals were computed based on speciation modelling, which indicate oversaturation of groundwater with magnesite, dolomite, calcite, and undersaturation with gypsum in all saturated zone of karst-fissure aquifer. Statistical interpretations of hydrochemical data suppose that anthropogenically unaffected groundwater, where mineralisation is slightly altered by pyrite oxidation in dolomitic environment, represents hydrogeochemical background within the aquifer. It is supposed, that azonic acid, generated by condensation of nitrogen-rich gases freeing by blast-firings in mine, accelerate magnesite and dolomite dissolution. Produced groundwater types are of higher content of NO3, Mg and TIC in comparison with background values. Estimated acceleration of karstification processes due to underground mining is about 1.5 times. In spite of detected contamination, threshold values of drinking water standard, given by the Edict of the Slovak Ministry of Health Care No. 29 / 2002 Z. z. are not markedly exceeded for tested parameters. Future possible exploitation of studied aquifer after mining termination is not excluded
Keywords: acid, aquifer, calcite, carboniferous, chemical composition, chemical-composition, circulation, contamination, dissolution, dolomite, drinking water, drinking-water, environment, environmental impacts, exploitation, future, gases, genesis, groundwater, gypsum, hydrogeochemistry, hydrogeology, karst, karstification, karstification processes, magnesite, massif, mg, mine, mine water, minerals, mining, model, modelling, nitrates, oxidation, parameters, part, permeability, pyrite, pyrite oxidation, rock, rocks, saturated zone, saturation, si, slovakia, speciation, structure, tic, time, times, values, water, zone,