Geologia Croatica, Vol. 73 No. 3, 2020.
Izvorni znanstveni članak
https://doi.org/10.4154/gc.2020.15
Paleoecological and sedimentological characterisation of Middle Miocene sediments from the Hrvatska Kostajnica area (Croatia)
Anita Grizelj
orcid.org/0000-0001-5230-4725
; Croatian Geological Survey, Zagreb
Monika Milošević
; Croatian Geological Survey, Zagreb
Koraljka Bakrač
; Croatian Geological Survey, Zagreb
Ines Galović
orcid.org/0000-0002-1359-2282
; Croatian Geological Survey, Zagreb
Tomislav Kurečić
; Croatian Geological Survey, Zagreb
Valentina Hajek-Tadesse
orcid.org/0000-0002-3396-7897
; 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.org/0000-0001-5220-2200
; INA – Industrija nafte d.d, Exploration & Production, Exploration & Upstream Portfolio Development, Rock & Fluid Analysis, Zagreb
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.
Ključne riječi
Pannonian Basin System; Hrvatska Kostajnica area; Badenian; Sarmatian; Microfossils; Pelitic sedimentary rocks; Provenance
Hrčak ID:
246371
URI
Datum izdavanja:
26.10.2020.
Posjeta: 1.122 *