Naslov
Palynological investigation of Carnian succesions from the Transdanubian Range, western Hungary

Autori
Baranyi, Viktória ; Raucsik, Béla ; Kürschner, Wolfram M.

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

Izvornik
Abstract Book / - , 2017, 69-70

Skup
The Golden Anniversary Meeting of AASP - The Palynological Society

Mjesto i datum
Nottingham, Ujedinjeno Kraljevstvo, 03.09.2017. - 07.09.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Carnian, Hungary, palynology, palynostratigraphy, palaeoclimate, Aulisporites

Sažetak
In the Triassic, the depositional area of the TR was located on the western shelf of the Tethys between the Northern Calcareous Alps, Drauzug and the Southern Alpine realms. The Late Triassic marine succession of the Transdanubian Range (TR) Hungary shows a significant change in sedimentation during the Carnian. The pelagic carbonate deposition was replaced by a short-termed interval with the formation of marly sediments of the Veszprém Marl Formation (VMF). The VMF was deposited in two transgressive-regressive cycles, each cycle referring to a member (Mencshely and Csicsó Marl Members) with the VMF. The VMF hosts diverse and well-persevered palynological assemblages. Besides a few pioneer studies with only few sampled horizon, detailed palynological studies have not been carried out yet. Our new palynological and palynofacies data contribute to the biostratigraphic subdivision and palaeoenvironmental interpretation of the Veszprém Marl Formation. A total of 63 samples from two boreholes: Mencshely (MET-1) and Veszprém (V-1) were processed for palynological analysis. Both quantitative and qualitative analyses have been performed. The identified taxa correspond to typical Carnian morphospecies in Europe e.g., Camerosporites secatus, Duplicisporites spp., Partitisporites spp., Enzonalasporites vigens, Patinapsorites densus, Vallasporites ignacii, ., Alisporites spp., Infernopollenites spp., Lueckisporites singhii, Lunatisporites acutus, Ovalipollis ovalis, Staurosaccites quadrifidus, Aulisporites astigmosus including various spores e.g., Aratrisporites spp., Paraconcavisporites lunzensis, Converrucosisporites sp. and Verrucosisporites moruluae. Based on the quantitative palynological study three assemblages are recognized. The oldest assemblage (acutus-vigens-singhii) in the lower part of the Mencshely Marl Member is characterized by the predominance of E. vigens, L. acutus, L. singhii with many Circumpolles species. Lueckisporites singhii is far less common in the second assemblage (vigens-acutus). The youngest assemblage (astigmosus-densus) is marked by the common occurrence of Aulisporties astigmosus, Patinasporites densus, Partitisporites maljawkinae and various Aratrisporites species in the uppermost few metres of the Mencshely Marl Member and in the overlaying Csicsó Marl Member. The correlation to ammonite biozontion suggests that the whole studied succession is late Julian (Julian 2, austriacum Zone). The palynological assemblages and stratigraphic range of selected taxa enables the correlation to other alpine Triassic areas and the NW European Germanic Basin. The palynofacies indicates strong terrestrial influx in a marine setting inferred from the common presence of acritarchs, foraminiferal tests linings and scarce occurrence of dinocysts. The terrestrial input increases in the Csicsó Marl Member. The changes in spore-pollen assemblages can be linked to climatic variations and can be regarded as the manifestation of the Carnian Pluvial Episode.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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