Naslov
Messinian basin-fill architecture in the Drava Trough: stratigraphic forward modeling and field observations

Autori
Kovács, Ádám ; Balázs, Attila ; Špelić, Marko ; Sztanó, Orsolya ; Magyar, Imre

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

Izvornik
34th IAS Meeting of Sedimentology Rome Abstract book / - Rim : IAS, 2019, 956-956

Skup
34th IAS International Meeting of Sedimentology

Mjesto i datum
Rim, Italija, 10.09.2019. - 13.09.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Drava basin, stratigraphic forward modelling, Messinian, unconformites, Lake Pannon

Sažetak
This study focuses on the appearance of two debated unconformities in the Drava Trough. In the Late Neogene lacustrine succession of the Pannonian Basin (PB) the so-called Pa-4 or “intra-Messinian” and the Miocene-Pliocene unconformities were recognized where gently folded lacustrine strata or steep portion of clinoforms are overlain by onlap surfaces. These two surfaces are often amalgamated which provides different interpretation possibilities. According to a group of researchers, the Pa-4 unconformity can be correlated basin-wide and is inferred to be linked with the major lake-level drop connected to the Messinian Salinity Crisis (MSC) or its triggers. In contrary others argue, that in the eastern part of the PB this geometry is a result of local interplay between structural inversion and the superposition of two different sediment feeder systems, in addition these events are older than the MSC. There is still no consensus about the nature and age of this surface. In the Drava Trough the succession covers the time interval of the MSC. The Miocene-Pliocene unconformity is clearly present, the Pa-4, however is indiscernible. Instead, features pointing to base-level rise are obvious. Our main goal is to analyze forcing factors controlling stratal geometries and to understand the rapid changes of the depositional environments. To this aim, 3D numerical simulations were performed by the DionisosFlow stratigraphic modeling software constrained by seismic and well data interpretation between the Mecsek mts (SW Hungary) and the Krndija mts (NE Croatia). Water depth evolution and 3D facies distribution of the basin has been simulated as well as the evolution of the main sedimentary transport routes. Model results are compared and validated by field observations from the margin of the Krndija mts. A pronounced angular unconformity could be studied in details within the Late Miocene lacustrine succession, between profundal calcareous marls and shallow water deltaic clay and sand beds. The unconformity is a hardground, below an age of 10.2-9.6 Ma and above younger than 6 Ma is indicated by mollusk shell-beds.Our numerical simulation yields new insights in quantifying the tectonic and climatic controls on the effects of the MSC in the Pannonian Basin. This presentation was supported by MOL Academic Aid Program, NKFIH 116618 and TÉT_16-1-2016- 0004.Our numerical simulation yields new insights in quantifying the tectonic and climatic controls on the effects of the MSC in the Pannonian Basin. This presentation was supported by MOL Academic Aid Program, NKFIH 116618 and TÉT_16-1-2016- 0004.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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