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

Autori
Grizelj, Anita ; Milošević, Monika ; Bakrač, Koraljka ; Galović, Ines ; Kurečić, Tomislav ; Hajek-Tadesse, Valentina ; Avanić, Radovan ; Miknić, Mirjana ; Horvat, Marija ; Čaić Janković, Ana ; Matošević, Mario

Izvornik
Geologia Croatica : journal of the Croatian Geological Survey and the Croatian Geological Society (1330-030X) 73 (2020), 3; 153-175

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

Ključne riječi
Pannonian Basin System ; Hrvatska Kostajnica area ; Badenian ; Sarmatian ; microfossils ; pelitic sedimentary rocks ; provenance

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA