Naslov
Discriminant function analysis of Upper Miocene and Pliocene sands from the southwestern part of the Pannonian Basin System, Croatia

Autori
Kovačić, Marijan: Peh, Zoran: Grizelj, Anita

Izvornik
Geologia Croatica : journal of the Croatian Geological Survey and the Croatian Geological Society (1330-030X) 62 (2009), 3; 189-200

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

Ključne riječi
Discriminant function analysis; heavy mineral association; lithostratigraphic units; Upper Miocene;

Sažetak
Multiple discriminant analysis (MDA) of Upper Miocene and Pliocene sands of the SW portion of the Pannonian Basin System was performed in order to determine the optimum criteria for separating the previously defi ned informal lithostratigraphic units – Ozalj, Andraševec, Hum Zabočki, Cernik and Pluska. The heavy mineral association is employed as independent variables, or descriptors, in the process of discrimination and results of analysis established a clear and strong bond between characteristic heavy mineral assemblages in the Upper Miocene and Pliocene sands and their affi nity to particular lithostratigraphic units. In this respect, the Pluska unit is especially highlighted, followed by the Ozalj and Hum Zabočki units. Close heavy mineral/lithostratigraphic unit relationships were very useful in unravelling the basic sedimentological meaning hidden beneath specifi c discriminant functions in the mathematical model. The most prominent is DF1 accounting for almost 3/4 of the total variance of the investigated sedimentary system. In accordance with its 'key' mineral it is labeled kyanite function which indicates the (metamorphic) provenance of the siliciclastic mineral detritus. The second most important, DF2, is labeled garnet-zircon function and, being bipolar, it points at both provenance of siliciclastic material (older sedimentary rocks) and hydraulic conditions during the transport and sedimentation of the detritus. Finally, DF3 is of minor importance indicating the stability of the heavy mineral association in sandy sediments. Three lithostratigraphic units, namely Ozalj, Pluska and Hum Zabočki are clearly separated by the functions labeled after their distinctive ('key') heavy minerals.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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