Climatically driven sedimentary cycles in the Late Miocene sediments of the Pannonian Basin, Hungary

Juhász, E.; Kovács, Lajos Ó.; Müller, Pál; Tóth-Makk, Ágnes; Phillips, L. J.; Lantos, Miklós

doi:10.1016/s0040-1951(97)00222-9

Cited by 34 publications

(21 citation statements)

References 13 publications

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“…These unconformities can be tracked only within lateral distances of 20-30 km, and they probably indicate the boundaries of individual sedimentary wedges or lobes ). Shortscale (on the order of 100 ka) and low-amplitude lake-level fluctuations are evidenced by small-scale sedimentary cycles (on scales of few meters to tens of meters) observable in drill cores and well-logs from the shallow lacustrine and deltaic sediments of the morphological shelf (sensu Porebski and Steel 2003) of Lake Pannon (Juhász et al 1997(Juhász et al , 2007Korpás-Hódi et al 2000;Tóth-Makk 2007). Toward the margins of the basin, this type of cyclicity can be followed also in the deposits of the delta plain surrounding Lake Pannon (Juhász et al 2007).…”

Section: Geological Settingmentioning

confidence: 99%

“…There is no part of the trajectory with descending tendency, suggesting the lack of any drop of the lake level significantly below the shelf-margin. Notably, although repeated transgressional events are proven by the succession of wells penetrating the shelf deposits (Juhász et al 1997(Juhász et al , 2007Korpás-Hódi et al 2000;Tóth-Makk 2007), landward migration of the shoreline can be barely observed on the seismic profiles (Fig. 4).…”

Section: Cycles Of Lake-level Fluctuationmentioning

confidence: 99%

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Water-level changes and their effect on deepwater sand accumulation in a lacustrine system: a case study from the Late Miocene of western Pannonian Basin, Hungary

Uhrin¹,

Sztanó

2011

Int J Earth Sci (Geol Rundsch)

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Major deepwater sand accumulations are known to be connected to sea-level lowstands in marine basins, due to the relative lack of accommodation space on the shelf. This model was tested for the Late Miocene Lake Pannon, a large endorheic lake depositing a sedimentary succession up to 3-4 km thick. The progradation of the shelf between 9.7 and 6 Ma was tracked along a 2D seismic network. The shelf-edge trajectory indicates continuous, moderate lake-level rise between 9.7 and 9 Ma. This is followed by alternating intervals of quasi-steady and rapidly rising relative lake level with a period of ca. 250 ky. However, due to the lack of significant lake-level drops, no third-order sequence boundary was identified in the studied time span (9.7-6 Ma). The sand ratio of the deepwater deposits does not show strong correlation with these lakelevel changes; moreover, the units deposited under rising lake-level conditions generally contain slightly larger proportion of sand. These features can be explained by the climatic origin of water-level rises: increasing precipitation enhances not only water inflow, but also sediment influx, which can overwhelm the well-known effect of accommodation space on the sand transport toward the deep water. The results suggest that shelf-margin trajectory might not be an efficient tool for predicting deepwater accumulations of sand in endorheic lacustrine basins.

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Section: Geological Settingmentioning

confidence: 99%

Section: Cycles Of Lake-level Fluctuationmentioning

confidence: 99%

Water-level changes and their effect on deepwater sand accumulation in a lacustrine system: a case study from the Late Miocene of western Pannonian Basin, Hungary

Uhrin¹,

Sztanó

2011

Int J Earth Sci (Geol Rundsch)

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“…While basin-wide correlation was recently shown to be promising, based on sophisticated geochemical analyses of juvenile and mineral phases [69], a general understanding of the eruptive environment of these volcanic successions remains elusive. In the Miocene the Pannonian Basin was a complex marine to island-dotted region, with very complex sedimentary environments representing alluvial plains to shallow to even deep marine conditions [70][71][72][73][74][75][76]. Volcanism was largely controlled by subduction and associated back-arc extension in the Pannonian basin [65,[77][78][79][80], leaving behind chains of arc volcanoes constructed from andesite to dacite effusive and explosive eruptive products [65].…”

Section: Implication To Miocene Near Sealevel Silicic Explosive Volcamentioning

confidence: 99%

Is Efate (Vanuatu, SW Pacific) a result of subaerial or submarine eruption? An alternative model for the 1 Ma Efate Pumice Formation

2010

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Abstract:The Efate Pumice Formation (EPF) is a trachydacitic volcaniclastic succession widespread in the central part of Efate Island and also present on Hat and Lelepa islands to the north. The volcanic succession has been inferred to result from a major, entirely subaqueous explosive event north of Efate Island. The accumulated pumice-rich units were previously interpreted to be subaqueous pyroclastic density current deposits on the basis of their bedding, componentry and stratigraphic characteristics. Here we suggest an alternative eruptive scenario for this widespread succession. The major part of the EPF is distributed in central Efate, where pumiceous pyroclastic rock units several hundred meters thick are found within fault scarp cliffs elevated about 800 m above sea level. The basal 200 m of the pumiceous succession is composed of massive to weakly bedded pumiceous lapilli units, each 2-3 m thick. This succession is interbedded with wavy, undulatory and dune bedded pumiceous ash and fine lapilli units with characteristics of co-ignimbrite surges and ground surges. The presence of the surge beds implies that the intervening units comprise a subaerial ignimbritedominated succession. There are no sedimentary indicators in the basal units examined that are consistent with water-supported transportation and/or deposition. The subaerial ignimbrite sequence of the EPF is overlain by a shallow marine volcaniclastic Rentanbau Tuffs. The EPF is topped by reef limestone, which presumably preserved the underlying EPF from erosion. We here propose that the EPF was formed by a combination of initial subaerial ignimbrite-forming eruptions, followed by caldera subsidence. The upper volcaniclastic successions in our model represent intra-caldera pumiceous volcaniclastic deposits accumulated in a shallow marine environment in the resultant caldera. The present day elevated position of the succession is a result of a combination of possible caldera resurgence and ongoing arc-related uplift in the region.

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“…Small-scale relative sea-level changes triggered by Milankovich-type orbital forcing are known from the Pannonian Basin (Juhász et al, 1997), but major relative sea-level changes are not present. These small scale lake-level variations most probably affected the lake level in the Transylvanian Basin, even if the late Mid to Late Miocene large-scale lake level falls cannot be solely interpreted as results of orbital forcing.…”

Section: Latest Mid-miocene To Early Late Miocene (Late Sarmatian To mentioning

confidence: 99%

Middle to late Miocene sequence stratigraphy of the Transylvanian Basin (Romania)

Krézsek¹,

Filipescu

2005

Tectonophysics

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The history of Middle to Late Miocene evolution of the Transylvanian Basin was determined by the bordering Carpathian orogen evolution, the tectonic events being well recorded by the sedimentary history. The basin evolved in a back-arc setting, under a regional, compressional stress field. The major tectonic events produced during the Late Sarmatian and Post-Pannonian were related to the reactivation of the pre-Badenian fault systems. The Transylvanian Basin got uplifted after the Late Pannonian (? during the Pliocene), and at least 500 m of sedimentary cover was eroded. Based on seismic and well-log interpretation, core and outcrop sedimentology, and microfauna, eight sequences were defined. The early Middle Miocene sequences are roughly synchronous to five 3rd order global sea-level cycles. Most of the recognized sequence boundaries are enhanced by regional tectonic events. The sedimentary evolution was also strongly influenced by salttectonics, active starting with the Late Sarmatian. Two sequences were identified in the Lower Badenian deposits. The third sequence (late Early Badenian to early Mid Badenian) preserves information about deeper shelf settings. The lowstand of the following sequence was responsible for the deposition of the salt formation (late Mid Badenian), an important lithostratigraphic marker in the sedimentary record of the basin. In general, the Upper Badenian deposits (parts of the 4th and 5th sequences) belong to deep marine submarine fan systems. The Sarmatian (partially 5th, 6th and partially 7th sequences) was characterized by diverse salinity conditions, stretching from brackish to hypersaline, and by high tectonic instability, which induced several significant relative sea-level falls. During that time, deltaic north) and fandeltaic (east) systems fed submarine fans, stacked between salt-related submarine heights ("channeled" deepmarine depocenters). Most of the Pannonian deposits (partially 7th and 8th sequences) belong to submarine fan systems, but shallower facies were also found in the western and eastern part of the basin.

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Climatically driven sedimentary cycles in the Late Miocene sediments of the Pannonian Basin, Hungary

Cited by 34 publications

References 13 publications

Water-level changes and their effect on deepwater sand accumulation in a lacustrine system: a case study from the Late Miocene of western Pannonian Basin, Hungary

Water-level changes and their effect on deepwater sand accumulation in a lacustrine system: a case study from the Late Miocene of western Pannonian Basin, Hungary

Is Efate (Vanuatu, SW Pacific) a result of subaerial or submarine eruption? An alternative model for the 1 Ma Efate Pumice Formation

Middle to late Miocene sequence stratigraphy of the Transylvanian Basin (Romania)

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