Permian

McCann, Tom; Kiersnowski, Hubert; Krainer, Karl; Vozárová, Anna; Peryt, Tadeusz Marek; Opluštil, Stanislav; Stollhofen, Harald; Schneider, Jörg; Wetzel, Andreas; Boulvain, Frédéric; Dusar, Michiel; Török, Ákos; Haas, János; Tait, Joyce; Körner, Frank

doi:10.1144/cev1p.10

Cited by 24 publications

(19 citation statements)

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“…These ages agree well with zircon and monazite ages of the Permian volcanic horizons from the Southern and Northern Gemericum Units, in which the Kungurian volcanic event was dominant (CHIME monazite age 278 ± 10 Ma -Rojkovič and Konečný 2005; monazite age 276 ± 25 Correspondingly, rhyodacites and associated ignimbrites are widespread at the top of the Cisuralian succession in the Eastern and Southern Alps and are correlated with the Bolzano Volcanic Complex (Cortesogno et al 1998;Klötzli et al 2003;McCann et al 2008;Cassinis et al 2012 and references therein). Similarly, the Cisuralian volcanism was also documented in the Mecsek and Apuseni Mts.…”

Section: Discussionsupporting

confidence: 68%

U–Pb zircon ages from Permian volcanic rocks and tonalite of the Northern Veporicum (Western Carpathians)

Vozárová

Родионов²,

Vozár³

et al. 2016

J. Geosci.

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U-Pb dating (SHRIMP) of magmatic zircons from the Northern Veporicum Permian volcanics of the Ľubietová Group yielded concordia ages of 273 ± 6 Ma and 279 ± 4 Ma. Both zircon ages correspond to the Cisuralian Epoch in the time span of Kungurian Stage. The 272 ± 4 Ma U-Pb zircon age, determined on the volcanic dyke cutting the neighbouring crystalline basement, belongs to the same stratigraphic range. The acquired age data support a contemporaneous origin of the Permian sedimentary basin with the volcanic event and the dyke formation in the crystalline basement. Based on the whole-rock geochemical composition, the studied volcanic rocks correspond to weakly alkaline suite (trachyandesite to rhyolite/dacite). They exhibit light rare earth elements enrichment (La N /Yb N = 9.5-17.7) and small negative or absent Eu anomalies (Eu/Eu* = 0.95 and 1.05 for the Permian volcanites and 0.73 for the volcanic dyke). Characteristic of these volcanites is the enrichment in Cs, Rb, Th, U, K and Pb and the depletion in Nb, Ta, Sr and Ti if compared with average primitive mantle composition. All the studied volcanic rocks have low Nb/Ta (0.29-0.38) and Nb/U (4.07 to 5.87) ratios, implying a crustal magmatic source. Based on the incompatible trace elements Ta, Th and Yb, the Permian volcanics as well as the volcanic dyke cutting the crystalline basement fall close to the boundary between active continental margin and the within-plate fields. The 358 ± 4 Ma magmatic zircon concordia age confirmed the Early Mississippian (Tournaisian) intrusion of the metatonalites in the Volchovo Valley, later blastomylonitized and covered by Permian siliciclastics.

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Section: Discussionsupporting

confidence: 68%

U–Pb zircon ages from Permian volcanic rocks and tonalite of the Northern Veporicum (Western Carpathians)

Vozárová

Родионов²,

Vozár³

et al. 2016

J. Geosci.

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“…Analogous zircon ages, ranging from 279.6± 1.1 Ma to 274.1± 1.6 Ma, were reported by Bargossi et al (2004) from the Bolzano Volcanic Complex in the Southern Alps. A corresponding sequence comprising rhyodacites and their ignimbrites is widespread at the top of the Cisuralian succession in the Eastern Alps that also correlates with the Bolzano Volcanic Complex (Krainer in McCann et al 2008). However, the detrital zircon age spectra from the two samples of the NGU Permian sandstones (both PHF and NHF) also indicate the presence of older magmatic events in the depositional area, corresponding to the Sakmarian and to the Artinskian (concordia ages 281± 7 Ma and 292± 6 Ma; Vozárová et al 2013).…”

Section: Discussionmentioning

confidence: 96%

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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“…One of the best ways to resolve this problem is dating of the associated volcanic rocks, as they form good correlational horizons throughout widespread regional areas (McCann et al 2008;Vozárová et al 2009a). Thus, the posttectonic coarse-grained volcano-sedimentary sequence of the Southern Gemeric Unit is no exception.…”

Section: Introductionmentioning

confidence: 99%

Permian single crystal U-Pb zircon age of the Rožňava Formation volcanites (Southern Gemeric Unit, Western Carpathians, Slovakia)

Vozárová¹,

Šmelko²,

Paderin³

2009

Geologica Carpathica

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Zircon populations from the Rožňava Formation volcanic rock complex have been analysed. Euhedral zircons from the 1 st volcanogenic horizon with fine oscillatory growth zoning, typical of magmatic origin, gave the average concordia age of 273.3 ± 2.8 Ma, with Th/U ratios in the range of 0.44-0.73. The Permian ages ranging from 266 to 284 Ma were identified in the wider, zoned or unzoned, central zircon parts, as well as in their fine-zoned oscillatory rims. The average concordia age of 275.3 ±2.9 was obtained from the euhedral zircon population of the 2 nd volcanogenic horizon of the Rožňava Formation. The analyses were performed on zoned magmatic zircons in the age interval from 267 to 287 Ma, with Th/U ratios in the range of 0.39-0.75. In the later zircon population two inherited zircon grains were dated giving the age of 842 ± 12 Ma (Neoproterozoic) and 456 ± 7 Ma (Late Ordovician). The magmatic zircon ages document the Kungurian age of Permian volcanic activity and contemporaneous establishment of the south-Gemeric basin. The time span of volcanic activity corresponds to the collapse of the Western Carpathian Variscan foreland which expanded southward.

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Permian

Cited by 24 publications

References 0 publications

U–Pb zircon ages from Permian volcanic rocks and tonalite of the Northern Veporicum (Western Carpathians)

U–Pb zircon ages from Permian volcanic rocks and tonalite of the Northern Veporicum (Western Carpathians)

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

Permian single crystal U-Pb zircon age of the Rožňava Formation volcanites (Southern Gemeric Unit, Western Carpathians, Slovakia)

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