Late Paleozoic volcanism in the central part of the Southern Permian Basin (NE Germany, W Poland): facies distribution and volcano-topographic hiati

Geißler, Marion; Breitkreuz, Christoph; Kiersnowski, Hubert

doi:10.1007/s00531-007-0288-6

Cited by 55 publications

(36 citation statements)

References 41 publications

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“…Egyrészt a Fletchingen-Altmark Szubprovinciát a Villányi-hegység északi előteréhez hasonlóan dominánsan nagy vastagságú (~600 m) horzsakő-és litoklasztgazdag ig nimbrit takaró jellemzi, amelyet lakkolitok, lávadómok és lávafolyások szakí -tanak meg (idősebb és fiatalabb képződ mények egyaránt; GEISSLER et al 2008). Másrészt a koráb ban említett analóg területek esetében a Tiszai-egységen kívül (Erdélyi-szigethegység; NICOLAE et al 2014) a fenti szubprovincia az egyetlen terület, ahol permokarbon ig nimb ritben akcesszórikus elegyrészként gránát jelenik meg (GEISSLER et al 2008).…”

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A Gyűrűfűi Riolit Formáció kőzettani vizsgálatának eredményei a Villányi-hegység északi előterében

Szemerédi¹,

Varga²,

Lukács³

et al. 2017

Földt. Közl.

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In this study rocks samples of Gyűrűfű Rhyolite Formation were observed from deep drillings at northern foreland of the Villány Mts. Remained cores and thin sections from Bisse-1, Peterd-1, Szava-1, Vókány-2, Egerág-7 and Szalánta-3 drillings were available in varying -but generally restricted -number for the petrographic reambulation. Based on the new petrographic descriptions and the previous reports, 2 main lithological groups were distinguished in the area: lava rocks and pyroclastites. Based on the mineralogical composition and texture the following rock types are distinguishable:(1) pyroclastites with rhyolitic composition (Peterd-1; Vókány-2, upper section; Egerág-7, upper section; Szalánta-3, upper section and presumably Bisse-1, upper section); (2) lava rocks with rhyolitic composition (Bisse-1, lower section; Szava-1; Vókány-2, lower section); (3) lava rocks with dacitic composition (Egerág-7, lower section); (4) lava rocks with rhyodacitic-dacitic composition (Szalánta-3, lower section).At northern foreland of the Villány Mts, the magmatic activity started with lava flows (creating a rhyolitic lava dome/lava flow in the area of Szava and Bisse-Vókány and rhyodacitic-dacitic lava rocks in the area of Egerág-Szalánta) and was followed by explosive eruptions, covering the area with thick ignimbrite sheets.Pyroclastites explored by drillings have rhyolitic composition at present but their crystal-rich character may refer to dacitic initial melt composition; resembling to the so-called crystal-rich monotoneous intermediates. These products are connected to reactivated crystal mush from middle-upper crustal magma reservoirs. Considering that pyroclastites were affected by a posterior K-metasomatic process (e.g. adularization of feldspars in rocks of Peterd-1), the modification of their chemical composition cannot be excluded. Further studies of the garnet crystals observed in the pyroclastites of Egerág-7 and Szalánta-3 deep drillings could help to refine the nature of Permian volcanism in the area.Our new results suggest that at northern foreland of the Villány Mts -similarly to analogous regions of European Variscides (e.g. Intra-Sudetic Basin, Southern Permian Basin, Muntii Apuseni) -a chemically complex, possibly long lasting volcanic system worked and produced the rock materials that were formerly handled as one separate stratigraphical marker formation. For further investigation of this system, radiometric age dating of each borehole (U-Pb, zircon) and whole rock (major and trace elements) geochemical analyses are planned.Keywords: Villány Mountains, Gyűrűfű Rhyolite, Permian, pyroclastite, lava rock, garnet, K-metasomatism ÖsszefoglalásMunkánkban a Gyűrűfűi Riolit Formáció Villányi-hegység északi előterében mélyfúrások által feltárt kőzeteit vizsgáltuk. A Bisse-1, a Peterd-1, a Szava-1, a Vókány-2, az Egerág-7 és a Szalánta-3 fúrásokból változó, de alapvetően korlátozott mennyiségű fúrómag és vékonycsiszolat állt rendelkezésre a kőzettani reambulációhoz. Petrográfiai megfigyeléseink, valamint...

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A Gyűrűfűi Riolit Formáció kőzettani vizsgálatának eredményei a Villányi-hegység északi előterében

Szemerédi¹,

Varga²,

Lukács³

et al. 2017

Földt. Közl.

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“…The Carboniferous rocks (alternating greywackes, sandstones and siltstones) are strongly folded, faulted and eroded, and represent a part of the Variscan Externide thrust-and-fold belt (Mazur et al, 2003). They are covered, in some places, by thick Lower Rotliegend volcano/sedimentary sequences (Geisler et al, 2008).…”

Section: Geological Setting and Structural Framework Of The Wolsztyn-mentioning

confidence: 99%

From the intra‐desert ridges to the marine carbonate island chain: middle to late Permian (Upper Rotliegend–Lower Zechstein) of the Wolsztyn–Pogorzela high, west Poland

et al. 2010

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The tectonic Wolsztyn-Pogorzela palaeo-High (WPH) is the south-eastern termination of the Brandenburg-Wolsztyn High (western Poland), which during Late Permian times was an intra-basin ridge surrounded by Upper Rotliegend sedimentary basins within the Southern Permian Basin. The geological history and structural framework of the WPH are complex. The High belongs to the Variscan Externides, consisting at present of strongly folded, faulted and eroded Viséan to Namurian flysch deposits capped by a thick cover of Upper Carboniferous-Lower Permian volcanic rocks. This sedimentary-volcanic complex was strongly fragmented and vertically differentiated by tectonic movements and subsequently eroded, resulting in the deposition of coarse clastics surrounding uplifted tectonic blocks. During late Rotliegend time, arid climatic conditions significantly influenced occurrences of specific facies assemblages: alluvial, fluvial, aeolian and playa. Sedimentological study helped to recognize the interplay of tectonic and palaeoclimatic factors and to understand the phenomenon of aeolian sandstones interbedded with coarse deposits of alluvial cones close to fault scarps.Subsequent tectonic and possible thermal subsidence of the studied area was synchronous with inundation by the Zechstein Sea. The rapid inundation process allowed for the preservation of an almost perfectly protected Uppermost Rotliegend landscape. Based on 3D seismic data from the base Zechstein reflector, a reconstruction of Rotliegend palaeogeomorphology was carried out, which shows examples of tectonic rejuvenation of particular tectonic blocks within the WPH area before inundation by the Zechstein Sea.The inundation led to the deposition of the marine Kupferschiefer Shale followed by the Zechstein Limestone. In the deeper parts of the basin the latter is developed in thin basinal facies: in shallow parts (e.g. uplifted tectonic blocks forming in some cases islands), carbonate buildups were formed. The remarkable thickness of those buildups (bryozoan reefs) is interpreted as due to stable tectonic subsidence together with a rise of sea level. A detailed study of carbonate buildups has showed that their internal structure reflects changes in shallow marine environments and even emersion events, caused by sea-level oscillations and tectonic movements of the reef substrate.

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“…Fisher & Schmincke, 1984;Riggs & Busby-Spera, 1991;Orton, 1996). The sedimentation, as well as the erosion and re-deposition of the sediments vary according to the contemporary climate and tectonic setting as well as the sediment supply (Geißler et al, 2008;Zernack et al, 2009). Stratovolcanoes, predominantly of andesitic-dacitic composition, are complex accumulations of lava flows, hypabyssal intrusive rocks and various types of tephra (e.g.…”

Section: Stratovolcanoes (Their Aprons and Distal Basin Fills) Lava mentioning

confidence: 99%

Build‐up and depositional dynamics of an arc front volcaniclastic complex: the Miocene Tepoztlán Formation (Transmexican Volcanic Belt, Central Mexico)

et al. 2010

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Late Paleozoic volcanism in the central part of the Southern Permian Basin (NE Germany, W Poland): facies distribution and volcano-topographic hiati

Abstract: Based on facies analysis of more than 5,500 m cores of 45 deep wells, three large sub-

Cited by 55 publications

References 41 publications

A Gyűrűfűi Riolit Formáció kőzettani vizsgálatának eredményei a Villányi-hegység északi előterében

A Gyűrűfűi Riolit Formáció kőzettani vizsgálatának eredményei a Villányi-hegység északi előterében

From the intra‐desert ridges to the marine carbonate island chain: middle to late Permian (Upper Rotliegend–Lower Zechstein) of the Wolsztyn–Pogorzela high, west Poland

Build‐up and depositional dynamics of an arc front volcaniclastic complex: the Miocene Tepoztlán Formation (Transmexican Volcanic Belt, Central Mexico)

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