In the lacustrine sediments deposited behind tufa barriers on Krka river, concetrations of 18 major, minor and trace elemetns were determined, as well as biogenic elements and stable isotope composition of sedimentary organic C, N and C and O in the carbonate. Using statistical data evaluation (principal component analysis - PCA, discriminant function analysis - DFA and general regression model), the grouping and origin of elements were determined. Peculiar behaviour of strontium was explained by partly anthropogenic origin and coprecipitation wiht authigenic carbonate in the sediment.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23356711The use of the Mg and ?18O thermometry was analsed at 16 tufa barriers in rivek Krka. Large differences between measured and calculated precipitation temperatures were observed, which were attributed to the occurrence of detritic carbonate (dolomite and limestone) of marine origin in the tufa.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 23007527In the talk, the results of the heavy metal monitoring in main karstic springs and sinks in karstic catchment of Ljubljanica river were studied. The focus was on elements indicative for anthropogenic burden (Al, As, Cd, Cl, Cr, CU, Mn, Pb and others). Results will contribute to the improvement of criteria for management of karstic water resources and optimisation of the strategy of sustainable management of karstic water bodies. The contribution to the project is new knwledge in the area of behaviour of dissolve major, minor and trace elements in karst water systems.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 1467221In the presentation, tufa barriers from two similar karstic tufa-precipitating rivers were compared: Krka River in Slovenia and Krka River in Croatia. We expected to find many similarities in both systems, considering that the rivers have similar discharge, although they occur in different climatic conditions. It was found, however, that the hydrological situation is much more complex in the Slovenian river, in particular because of irregular patterns of recharge modes throughout the year. Therefore the climatic signal in tufas is often completely masked by influences other than temperature.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22947367The precipitation of carbonate dripstone with extremely low ?13C and ?18O valueson alkaline substrates with pH value > 9 was studied. These formations grow because of rapid dissolution of atmospheric CO2 in highly alkaline solution with high concentration of Ca2+, in contrast to speleothems, where degassing of CO2 from solution supersaturated with carbonate ions induces precipitation of CaCO3. Large isotope fractionation occurs because of kinetic effects during rapid carbonate precipitation, where the precipitation rate is linearly correlated with the pOH1/2 of mother solution.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22947111