engleski

Geochemical Background in Istrian Soils

The geochemical background is postulated for two major groups of soils of the Istrian Peninsula, depending on the type of bedrock, or parent material as one of the main soil-forming factors. The effort is made to combine conceptual fundamentals of non-linear dynamical theory with principles, methods and practical application of basic statistics in order to elucidate the nature and origins of elemental subpopulations hidden in the original geochemical data of the Istrian topsoils. In this sense, the 4s-outlier test and iterative 2s-statistical techique are utilized by which the outliers and anomalous values are removed from the total data and assigned to the consequences of non-linear system dynamics that prevents development of simple cause-and-effect relationship between geochemical variables. The geochemcial background is then defined as the normal range of data of the remaining data set. As confirmed by the study, the carbonate-derived soils have higher natural or geogenic baseline and are also more strongly loaded with heavy metals and other trace elements, in some places critically.

geochemical background; topsoil; parent material; geogene influence; human impact; normal distribution; normal range

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