Naslov
Multiple discriminant analysis of the Drava River alluvial plain sediments

Autori
Peh, Zoran ; Šajn, Robert ; Halamić Josip ; Galović, Lidija

Izvornik
Environmental geology (Berlin) (0943-0105) 55 (2008), 7; 1519-1535

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
floodplain sediments; heavy metals; multiple discriminant analysis; Drava River; Slovenia; Croatia

Sažetak
Three discriminant function models are raised and cross-compared in order to distinguish geochemical patterns characteristic for the Drava River floodplain sediments. Based on data representing total element concentrations in samples collected from alluvium (A), terrace (T), and unconsolidated bedrock (B) at the border of a floodplain, four element clusters emerged accounting for discrimination between the referred groups of sediments. The most prominent is contaminant/carbonate cluster characteristic for alluvium. The other two are: silicate cluster typical for unconsolidated geological substrate (Neogene sedimentary rocks) ; and naturally dispersed heavy metal cluster separating terrace from the former two groups. Models introducing depth intervals and single profiles as grouping criteria reveal identical sediment-heavy metal matrices. The second important issue of this paper is possibility of reclassification of samples originally assigned to one of the a priori defined groups of sediments, based on established geochemical pattern. The mapped geological units can be reconsidered by the post hoc assignments to a different group if geological border between alluvium and terrace or between terrace and bedrock can not be established geologically with absolute certainty.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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