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Statistical assessment of geochemical pattern in overbank sediments of the river Sava, Croatia (CROSBI ID 106123)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Pavlović, Gordana ; Prohić, Esad ; Tibljaš, Darko Statistical assessment of geochemical pattern in overbank sediments of the river Sava, Croatia // Environmental geology (Berlin), 46 (2004), 1; 132-143-x

Podaci o odgovornosti

Pavlović, Gordana ; Prohić, Esad ; Tibljaš, Darko

engleski

Statistical assessment of geochemical pattern in overbank sediments of the river Sava, Croatia

Four overbank profiles from the three terraces of different age were sampled in 10 to 20 cm intervals for the bulk content of major and minor (Ca, Mg, Fe, Ti, Al, Na, K and P) and trace (Mo, Cu, Pb, Zn, Ni, Co, Mn, As, U, Th, Sr, Cd, Sb, V, La, Cr, Ba, W, Zr, Ce, Sn, Y, Nb, Ta, Sc, Li, Rb and Hf) elements in the minus 0.125 mm fraction. Univariate statistics together with analysis of variance discriminated between the lower-lying carbonate (CA) population dominantly composed of carbonates and the overlying silicate (SI) population being dominantly of silicate mineralogy. This stratified pattern resulted from the intensive erosive action of melting glaciers exerted on limestones and dolomites in the alpine region, followed by local inputs mainly of silicate composition. Elements exhibiting the greatest between-population variability are Ca and Mg being enriched in the CA population and Fe, Mn, P, Sr, Al, Na, K, Li, Rb, Y, Zr, Ni, Cr and Ti being enriched in the SI population. Anomalously high Hg, Pb and Ba concentrations (maximum values: 6, 500&plusmn ; ; ; ; ; 2, 860 ppb, 225&plusmn ; ; ; ; ; 13 ppm and 1, 519&plusmn ; ; ; ; ; 91 ppm, respectively) in the lowermost part of the profile S7, which is nearest to the Croatian-Slovenian border, derive from the mineralized Slovenian catchment area. This profile also contains trimodal frequency distributions of Fe, Mn and P whose highest concentrations coincide with increased values of Zn and Cu which are bimodally distributed. Geochemical patterns of majority of elements in all four profiles consistently reflect the average compositions of the upstream drainage basins.

Overbank profiles; Major and trace elements; Bimodal frequency distribution; Analysis of variance; Hg-Pb-Ba anomaly; The river Sava; Western Croatia

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Podaci o izdanju

46 (1)

2004.

132-143-x

objavljeno

0943-0105

Povezanost rada

Geologija