Naslov
Miocene facies characterization and distribution in the Zalata–Dravica area (Drava Depression, Pannonian Basin, Croatia/Hungary)

Autori
Krizmanić, Krešimir ; Troskot-Čorbić, Tamara ; Hernitz Kučenjak, Morana ; Sabol, Ninoslav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
36th International Meeting of Sedimentology June 12–16, 2023, Dubrovnik, Croatia, Abstracts Book / Vlahović, Igor ; Matešić, Darko - Zagreb : Hrvatsko geološko društvo, 2023, 531-531

ISBN
978-953-6907-79-3

Skup
36th International Meeting of Sedimentology

Mjesto i datum
Dubrovnik, Hrvatska, 12.06.2023. - 16.06.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Drava Depression, Miocene, facies, organic facies

Sažetak
The Miocene Paratethys Pannonian basin evolution, from continental to lacustrine environment, is a challenging task because of the significant tectonic, paleoecologic and sedimentologic changes. In the Zalata-Dravica area, five key wells with numerous laboratory geological and geochemical analyses have been chosen. The obtained data were systematically collected, interpreted, and correlated with accessible well- log and seismic diagrams. The oldest Miocene sedimentation beginning with the syn-rift continental alluvial, talus and lacustrine deposits of lower Badenian. The sedimentary succession continues with marine deposits from the middle to the upper Badenian. During the uppermost Badenian, Sarmatian and lowermost Pannonian periods, shallowing and gradual decrease of salinity occurred, and the deposition condition became brackish. Interruption of sedimentation (hiatus) was recorded in places. At that time many stenohaline organisms disappeared and euryhaline organisms (prasinophytes) overcome. The isolation of Paratethys of the world seas and oceans together with drastic ecological change resulted in endemism which additionally complicated biostratigraphic correlation and age determination. The Miocene sedimentation continues with the upper Miocene calcite-rich marls, sometimes intercalated with locally derived coarse-grained gravity-flow sediments. With the deepening of the basin, due to thermal subsidence and the advancing of large river systems generally from the NW, a huge amount of clastic deposits entered the basin, filled it with prograding sandy sediments, turbidite, slope and delta deposits. Towards the end of the Miocene, the lake become freshwater. Consequently, biostratigraphical biozonation (palynozonation), chronostratigraphical correlation, petrographical and sedimentological core classification, depositional mechanism and environment definition have led to the facies interpretation and distribution (GDE maps) and creation of a sedimentological concept of the area as a base for a basin analyses. In that sense, organic facies, source rock, petroleum potential, maturity, and hydrocarbon correlation are defined, as well.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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