A magyarországi neogén mélymedencék pannóniai s.1. képződményeinek szedimentológiája, ciklussztratigráfiája és fejlődéstörténete

2007 
A Pannon-medence melymedencebeli pannoniai kepződmenyeiben integralt retegtani, szedimentologiai, őslenytani es ciklussztratigrafiai vizsgalatokat vegeztunk, es kovetkezteteseket vontunk le a medence fejlődestortenetere vonatkozoan. A pannoniai retegsorban ertelmezett 3.rendű uledekes ciklusok kialakulasaban a szerkezeti valtozasok jatszottak dontő szerepet, mig a 4.rendű ciklusok a nagyleptekű Milankovics-fele excentricitas klimaciklusokkal mutatnak kapcsolatot. Foldtani szelvenysorozat mutatja be a kulonfele egysegek: ciklusok, formaciok es biozonak kapcsolatat, valamint a vizszintingadozasok hatasat az uledekes faciesekben. Megallapitottuk, hogy a 6.8 es 9.1 Ma kozott kepződott Pa-3 3.rendű szekvencia, amely szelsőseges faciesvaltozasokat es komoly intra-pannon szerkezeti mozgasokat kepvisel az Alfold es a Drava-medence pannoniai retegsoraban, onallo tektonosztratigrafiai ciklust alkot. Lerakodasa idejen jelentős oldaleltolodasos mozgasok kezdődtek a medenceben (kb. 7.2 ? 8.0 Ma), majd a Pa-4 szekvenciahatar kornyeken (cca. 6.8 Ma) megindult a medence inverzioja, korabban az eddig feltetelezettnel. Korrelacios lehetősegeket kerestunk a Mediterranum es a Paratethys iranyaban. Mikromineralogiai vizsgalatok soran meghataroztuk az alfoldi pannoniai uledekek asvanytani osszetetel valtozasainak tendenciait, faciesenkent, terben es időben, amelyek jol tukrozik a behordasi iranyokat, valamint a 3.rendű ciklusokat. | Integrated stratigraphic research of the Late-Neogene (Pannonian s.l.) post-rift sedimentary succession of the Pannonian Basin was carried out by regional dip profiles from NW and NE directions. One of the conclusions is that 3rd order cycles were formed by structural changes in the basin while 4th order cycles were driven by large-scale climatic eccentricity cycles of the Milankovitch band. The interrelations in terms of sequence stratigraphy, sedimentology and biostratigraphy as well as their effect on the changes of depositional facies during sedimentary evolution were drawn up by a set of geologic profiles. Among the studied 3rd order cycles the Pa-3, deposited in the 6.8 - 9.1 Ma time frame forms a tectonostratigraphic cycle. This cycle represents a huge amount of sediment yield and extremities in facies architecture driven by renewed strike-slip movements causing transgression and tilting in some areas. Then the structural style completely changed and at SB Pa-4 (appr. 6.8 Ma) a strong relative base level drop occured all around the basin driven most probably by the onset of inversion in the coevel marginal areas. The Sarmatian - Pannonian boundary and the basal marls had special interest in the detailed work. Interrelations to the Mediterranian and other subbasins of the Paratethys were studied. Mineralogical studies showed different types of tendencies in the sands of the Hungarian Plain, pinpointing sediment input as well as 3rd order cycles into the basin.
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