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Paleoecological and sedimentological characterisation of Middle Miocene sediments from the Hrvatska Kostajnica area (Croatia)

Anita Grizelj orcid id ; Croatian Geological Survey, Zagreb
Monika Milošević ; Croatian Geological Survey, Zagreb
Koraljka Bakrač ; Croatian Geological Survey, Zagreb
Ines Galović orcid id ; Croatian Geological Survey, Zagreb
Tomislav Kurečić ; Croatian Geological Survey, Zagreb
Valentina Hajek-Tadesse ; Croatian Geological Survey, Zagreb
Radovan Avanić ; Croatian Geological Survey, Zagreb
Mirjana Miknić ; retired
Marija Horvat ; Croatian Geological Survey, Zagreb
Ana Čaić Janković ; Croatian Geological Survey, Zagreb
Mario Matošević orcid id ; INA – Industrija nafte d.d, Exploration & Production, Exploration & Upstream Portfolio Development, Rock & Fluid Analysis, Zagreb

Puni tekst: engleski PDF 4.903 Kb

str. 153-175

preuzimanja: 293



The Miocene deposits of the Hrvatska Kostajnica (KOS-I) area belong to the south-western marginal part of the Pannonian Basin System (PBS). Investigation of the lithostratigraphical column included: mineralogical, geochemical, sedimentological and integrated palaeontological (calcareous nannofossil, foraminifers, ostracodes, palynomorphs) analyses. Badenian and Sarmatian sediments of this column were deposited in a marine offshore environment with local input of terrigenous material represented by marls and silty marls. Based on palaeontological data, the recorded palaeoclimate was subtropical in the late Badenian changing to a warm temperate climate of the early Sarmatian. Marly sediments predominantly consist of carbonate (calcite and aragonite) and clay minerals, while quartz and plagioclase are less abundant. Most samples contain a small amount of zeolite minerals from the clinoptilolite/heulandite series. Among the clay minerals, smectite and illite/muscovite are the most abundant. Based on provenance analyses we concluded that the Badenian-Sarmatian marls were predominantly formed by the weathering of acidic (Si-rich) source rock derived material from the neighbouring Inner Dinarides.

Ključne riječi

Pannonian Basin System, Hrvatska Kostajnica area, Badenian, Sarmatian, Microfossils, Pelitic sedimentary rocks, Provenance

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Posjeta: 586 *