engleski

Provenance signatures and compositional transitions based on major element chemical composition of the stream sediment from the Psunj Mt., Croatia

Stream sediment is widely used as a medium in geochemical surveys. This study examined major element chemical composition of stream sediment produced by weathering in lithologically diverse terrain. Such sediment represents mixed sediment, therefore, the aim was to interpret its provenance and model the transitions within its major element composition. The particular interest was to link major element composition, mineral composition and the sediment source rocks. In order to interpret the sediment origin principal component analysis was employed and representative samples with highest and lowest scores were analysed for mineral composition. Scores also suggested four lithology-based groups of stream sediment samples. Transitions between groups were described with linear models for compositional data. Despite the ambiguity, links between major element composition, mineral composition and provenance were established. Besides sorting out sources of mixed sediment and minerals which control the transitions, this study contributes to general understanding of the Psunj Mt. geology, while the results can be used in geochemical surveys in areas of a similar geological setting.

Stream sediment, Compositional data, Compositional transitions, Psunj Mt., Croatia

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