Facies analysis of marine Permian/Triassic boundary sections in Hungary

Haas, János; Hips, Kinga; Zajzon, Norbert; Tardi‐Filácz, E.; Pelikán, Pál; Götz, Annette E.

doi:10.1556/ageol.47.2004.4.1

Cited by 31 publications

(61 citation statements)

References 17 publications

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“…Raup and Sepkoski, 1982;Bowring et al, 1999;Jin et al, 2000;Benton and Twitchett, 2003;Haas et al, 2004;Groves et al, 2007; J. Chen et al, 2011), the impact of the mass extinction on continental vegetation remains poorly resolved (e.g.…”

Section: Introductionmentioning

confidence: 99%

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

et al. 2015

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“…This would mean that the Triassic above them forms a Cretaceous (or slightly younger) thrust sheet. This model is supported by a well near Csõvár to the NE of Budapest, where different age Cretaceous strata (including Senonian) were sandwiched between Triassic carbonates (Haas et al 1997;Benkő and Fodor 2002).…”

Section: Thrusts and Alternativesmentioning

confidence: 79%

Flexural basin reworked by salt-related pull-apart structures: the Adony Basin

Palotai¹,

Csontos²

2012

Central European Geology

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Several main tectonic lineaments originating in the Alps and Dinarides merge in Central Hungary to form the Mid-Hungarian Shear Zone. As these structures are hidden beneath sub-basins of the Neogene Pannonian Basin, it has long been debated whether the tectonic style of the shear zone is mainly contractional or strike-slip. New 3D seismic data allowed a detailed analysis of one of these sub-basins, the Adony Basin, located south of Budapest. Its evolution is linked to the tectonics between the southern Tisza unit of European passive margin affinity, the northern ALCAPA block with Alpine affinity, and sheared remnants of Dinaric units in between. During the Oligocene and Early to Middle Miocene, a flexural basin related to the convergent thrusting of Dinaric-and ALCAPA-derived units was developed. On the southern side, N-NW verging thrust sheets were observed. On the opposite front, Triassic carbonates of ALCAPA were thrust several kilometres above Palaeogene formations to the SW. Dextral transpression is assumed for the Middle Miocene. Local deposition of Middle Miocene salt in the basin formed a detachment surface. Late Miocene sinistral strike-slip faulting resulted in a pull-apart basin above that part of the earlier flexural basin that has not been overthrust. The margins of the basin coincided with the fronts of earlier thrusts. Faults on the basin margins partly detached on the salt, decoupling the supra-salt basin fill from the underlying formations. Within the pull-apart basin, gravity sliding on the steep margins resulted in salt welds, detachment and roll-over folds.

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“…The drill cores studied from the Transdanubian Range (Dinnyés-1, Alcsútdoboz-2 and Gárdony-1a; see Haas et al 2004) did not include any clastic layer within the carbonate dominated boundary sequence. Other sections in the Bükk Mts.…”

Section: Introductionmentioning

confidence: 99%

Multiple provenance of detrital zircons from the Permian–Triassic boundary in the Bükk Mts., Hungary

Zajzon

Szabó²,

Weiszburg

et al. 2009

Int J Earth Sci (Geol Rundsch)

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Detailed zircon analyses were carried out on samples from the Bálvány North section, which contains the Permian-Triassic boundary. A fine-grained sandstone bed within the ''boundary shale'' contains a significant amount of zircon crystals. Pupin morphological, scanning electron microscopy [secondary electron, back-scattered electron, cathodoluminescence (CL)] and laser ablation inductively coupled mass spectrometry (LA-ICP-MS) investigations were done in selected single grains to combine morphological information with radiometric ages, and infer the provenance of zircons. Three populations are distinguished on the basis of Pupin morphology. Their centres of gravity are S17, S2 and P1. The LA-ICP-MS radiometric ages reveal three main age groups and a smaller one, apart from a few scattered old ages. The largest group, comprising ca. 50% of the measured grains, has an age of 470-440 Ma. The two other main groups, which together represent ca. 25% of the measured grains, are around 280 and 600 Ma. The 280 Ma group contains slightly more grains than the 600 Ma group. A small group has an age of 370-340 Ma. In addition, there are some older grains with ages of 850, 969, 1,050 and 2,150 Ma. Based on the zircon morphology no clear separation of the different age groups could be made. Both the 280 Ma and the 470-440 Ma age groups tend to show zircon crystals derived from three types of sources: crustal granites, calcalkaline granitoids and alkali granites and/or their volcanic equivalents. Zircons in the 450 Ma group have a magmatic rim around their altered, relict core, as revealed by CL images. Post-magmatic processes also affected the rim. The age of the core is possibly reset during the formation of the magmatic rim. This suggestion is supported by the LA-ICP-MS data, because no difference was seen between the core and the rim. The different roundness of the zircons, the well-sorted crystals and the at least five different source rocks indicate previous concentration of the grains, before their transportation into the ''boundary shale''. Austroalpine and Southern Alpine rocks could be the sources of the zircon crystals, which fit well into the paleogeographical model of the area, which suggests that the Bükk Mts. was located in the foreground of the Alpine units.

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Facies analysis of marine Permian/Triassic boundary sections in Hungary

Cited by 31 publications

References 17 publications

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

Flexural basin reworked by salt-related pull-apart structures: the Adony Basin

Multiple provenance of detrital zircons from the Permian–Triassic boundary in the Bükk Mts., Hungary

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