Late- and Post-Variscan Sediments of the Eastern and Southern Alps

Krainer, Karl

doi:10.1007/978-3-642-84640-3_32

Cited by 32 publications

(39 citation statements)

References 24 publications

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“…This tectonic event could have been related to the so-called "Mid-Permian Episode" of Deroin & Bonin (2003), connected with the transformation of strike-slip to an extensional tectonic regime. A similar stratigraphic gap and geodynamic changes were described in the Eastern and Southern Alps as well as in the wide peri-Mediterranean realm (Krainer 1993;Cassinis et al 2012 and references therein) that was reflected in the evolution of two major tectono-sedimentary cycles. Cassinis et al (2012) considered this stratigraphic gap to be synchronous with the geomagnetic IR event (Menning 1995(Menning , 2001Steiner 2006) that has been postulated by Isozaki (2009) as the trigger agent for the Pangea breakup.…”

Section: Discussionsupporting

confidence: 64%

First evidence for Permian-Triassic boundary volcanism in the Northern Gemericum: geochemistry and U-Pb zircon geochronology

Vozárová¹,

Presnyakov²,

Šarinová³

et al. 2015

Geologica Carpathica

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Several magmatic events based on U-Pb zircon geochronology were recognized in the Permian sedimentary succession of the Northern Gemeric Unit (NGU). The Kungurian magmatic event is dominant. The later magmatism stage was documented at the Permian-Triassic boundary. The detrital zircon assemblages from surrounding sediments documented the Sakmarian magmatic age. The post-orogenic extensional/transtensional faulting controlled the magma ascent and its emplacement. The magmatic products are represented by the calc-alkaline volcanic rocks, ranging from basaltic metaandesite to metarhyolite, associated with subordinate metabasalt. The whole group of the studied NGU Permian metavolcanics has values for the Nb/La ratio at (0.44-0.27) and for the Nb/U ratio at (9.55-4.18), which suggests that they represent mainly crustal melts. Magma derivation from continental crust or underplated crust is also indicated by high values of Y/Nb ratios, ranging from 1.63 to 4.01. The new 206 U-238 Pb zircon ages (concordia age at 269 ± 7 Ma) confirm the dominant Kungurian volcanic event in the NGU Permian sedimentary basin. Simultaneously, the Permian-Triassic boundary volcanism at 251 ± 4 Ma has been found for the first time. The NGU Permian volcanic activity was related to a polyphase extensional tectonic regime. Based on the new and previous U-Pb zircon ages, the bulk of the NGU Permian magmatic activity occurred during the Sakmarian and Kungurian. It was linked to the post-orogenic transpression/transtension tectonic movements that reflected the consolidation of the Variscan orogenic belt. The Permian-Triassic boundary magmatism was accompanied by extension, connected with the beginning of the Alpine Wilson cycle.

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Section: Discussionsupporting

confidence: 64%

First evidence for Permian-Triassic boundary volcanism in the Northern Gemericum: geochemistry and U-Pb zircon geochronology

Vozárová¹,

Presnyakov²,

Šarinová³

et al. 2015

Geologica Carpathica

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“…On the basis of distinct differences in mineralogical maturity a disconformity between them could be suggested. Further information is given in Tollmann (1964Tollmann ( , 1972Tollmann ( , 1977, Oberhauser (1980), Krainer (1993).…”

Section: Lower and Middle Austro-alpine And Penninic Nappe Systemmentioning

confidence: 99%

“…Several meters of thick dark shales containing abundant well preserved plant fossils are developed at the top of these megasequences. About 80 species of plant fossils have been described from the interbedded shales and thus suggest the Kasimovian-Gzhelian age (Tenchov 1980;Krainer 1989aKrainer ,b, 1992Krainer , 1993Fritz et al 1990). Current direc- tions show in the present geographic orientation a distinct eastward trend indicating that the sediments of the Stangnock Formation were deposited in an approximately E-W-trending intermontane basin.…”

Section: Gurktal Nappe System (Stolzalpe Nappe)mentioning

confidence: 99%

“…Current direc- tions show in the present geographic orientation a distinct eastward trend indicating that the sediments of the Stangnock Formation were deposited in an approximately E-W-trending intermontane basin. The sharp erosional contact at the base of the megasequence is interpreted as a result of synsedimentary block faulting (Krainer 1993).…”

Section: Gurktal Nappe System (Stolzalpe Nappe)mentioning

confidence: 99%

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Late Variscan (Carboniferous to Permian) environments in the Circum Pannonian Region

Vozárová¹,

Ebner²,

Kovács³

et al. 2009

Geologica Carpathica

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Abstract:The Pennsylvanian-Cisuralian late-orogenic and post-orogenic paleoenvironments of the Circum Pannonian Region (CPR) include tectono-stratigraphic sequences developed from the Upper Bashkirian-Moscovian marine early molasse stage up to the Guadalupian-Lopingian post-orogenic stage, with gradual connection to the beginning of the Alpine (Neotethyan) sedimentary cycle. Shallow marine siliciclastic or carbonate siliciclastic overstep sequences started in the internal part of the Variscan orogenic belt during the latest Serpukhovian and Bashkirian-Moscovian. They overlapped unconformably the variably metamorphosed Variscan basement, or weakly deformed and metamorphosed foreland and syn-orogenic flysch sediments of Mississippian to Early Pennsylvanian age. The post-Variscan rifting largely affected the Variscan orogenic belt by reactivation of the Variscan lithosphere. The late-to post-orogenic terrestrial sequences started within the internal part of the Variscan orogenic belt during the Middle/Late Pennsylvanian. It continued gradually to terrestrial-shallow water carbonate-siliciclastic sequences in its external part through the Permian. According to the present configuration, the Alpine (Neotethyan) northward shifting transgression started during the Guadalupian/Lopingian in the South and during the Early Triassic in the North.

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“…The presence of Claraia in the Induan may be interpreted as a rapid return to relatively deep-water sedimentation (Taraz et al, 1981;Hallam and Wignall, 1999). In the Eastern and Southern Alps, the Upper Permian-Lower Triassic was a unique sedimentary cycle (Krainer, 1993). In the interim, at the base of the Upper Alpine Buntsandstein Fm (middle Lower Triassic), a significant regression occurred in this region (the so-called 'Campill Event').…”

Section: The Lower Boundary Of the Wc-1 Synthemmentioning

confidence: 99%

Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

Ruban

Zerfass

Pugatchev

2009

Journal of South American Earth Sciences

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Late- and Post-Variscan Sediments of the Eastern and Southern Alps

Cited by 32 publications

References 24 publications

First evidence for Permian-Triassic boundary volcanism in the Northern Gemericum: geochemistry and U-Pb zircon geochronology

First evidence for Permian-Triassic boundary volcanism in the Northern Gemericum: geochemistry and U-Pb zircon geochronology

Late Variscan (Carboniferous to Permian) environments in the Circum Pannonian Region

Triassic synthems of southern South America (southwestern Gondwana) and the Western Caucasus (the northern Neotethys), and global tracing of their boundaries

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