Constraining genesis and geotectonic setting of metavolcanic complexes: a multidisciplinary study of the Devonian Vrbno Group (Hrubý Jeseník Mts., Czech Republic)

Janoušek, Vojtěch; Aichler, Jaroslav; Hanžl, Pavel; Gerdes, Axel; Erban, Vojtěch; Žáček, Vladimír; Pecina, Vratislav; Pudilová, Marta; Hrdličková, Kristýna; Mixa, Petr; Žáčková, Eliška

doi:10.1007/s00531-013-0975-4

Cited by 35 publications

(20 citation statements)

References 91 publications

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“…Before starting a discussion of geochemical and petrophysical signatures it is important to highlight that the limestones in Moravia are very pure and were deposited in an area, to a certain extent similarly as in the neighbouring southern Poland, under the influence of strong bimodal magmatism (Přichystal 1993, Kalvoda et al 2008, Janoušek et al 2014 and that their detrital input may have been largely controlled by atmospheric volcanic transport.…”

Section: Discussionmentioning

confidence: 99%

“…The Zr/Al 2 O 3 values are higher than 0.001 (mean values 0.003) suggesting a volcanic input, as reported by Racki et al (2002), in a geographically close section in southern Poland. In addition, a remarkable excess of Ti in the Moravian Karst Fr-Fa sections (mean Ti/Al = 0.2), relative to the Post Archean Australian Shale (PAAS) standard (Ti/Al = 0.06; Taylor & McLennan 1985), suggests that Ti may be connected with Ti rich mafic volcanism (Dvořák 1985, Přichystal 1993, Janoušek et al 2014.…”

Section: B Amentioning

confidence: 99%

“…Ratios of Mn/Al and Fe/Al are often regarded as proxies of hydrothermal input (Taylor & McLennan 1985) or anoxic conditions (Maynard 2005, Lyons & Severmann 2006. In the Moravian Karst, anomalously high Mn/Al ratios (mean 0.146; compare to PAAS: Mn/Al = 0.0085) may indicate a general hydrothermal influence connected with widespread bimodal magmatism (Přichystal 1993, Janoušek et al 2014. Manganese does not correlate with Fe, while higher Fe/Al (mean value 0.9) may reflect anoxic conditions (Lyons & Severmann 2006) or could be also linked to volcanic activity.…”

Section: B Amentioning

confidence: 99%

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An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

Weiner¹,

Kalvoda²,

Kumpan³

et al. 2017

Bull. Geosci.

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Rapid and profound changes in Earth surface environments and biota across the Frasnian-Famennian (Fr-Fa) boundary are well known and related to one of the five most severe mass extinction events in Earth history. Here, we present sedimentological, biostratigraphical, petrophysical (gamma-ray spectrometry, magnetic susceptibility) and geochemical (X-ray fluorescence) data from environmentally distinct sections in the Moravian Karst (Czech Republic) and compare them with the Steinbruch Schmidt section in the Kellerwald (Rheinisches Schiefergebirge, Germany). Both areas were located at the southern margin of Laurussia. The studied sections span the interval from the Lower or Upper rhenana to the Palmatolepis minuta minuta or younger conodont zones and the foraminiferal Eonodosaria evlanensis Zone and Eonodosaria evlanensis-Quasiendothyra communis Interzone including high resolution biozonation of the Fr-Fa boundary interval. In the Moravian Karst pure limestone facies of an inclined carbonate ramp reflect the worldwide trend in the widespread occurrence of calcimicrobes during upper Frasnian and lower Famennian. Geochemical and petrophysical data show a decrease in grain size of the siliciclastic supply and carbonate productivity in the Kellwasser Event intervals probably due to a deepening and correlate with maximum flooding surfaces and highstand system tracts in the Steinbruch Schmidt. Certain differences in some geochemical proxies between the Moravian Karst and Steinbruch Schmidt are due to lower carbonate dilution of the latter. Significant Zr, TiO 2 , Mn or Fe 2 O 3 enrichments may indicate the influence of volcanic sources in the studied Moravian Karst Fr-Fa sections.

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Section: Discussionmentioning

confidence: 99%

Section: B Amentioning

confidence: 99%

Section: B Amentioning

confidence: 99%

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An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

Weiner¹,

Kalvoda²,

Kumpan³

et al. 2017

Bull. Geosci.

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“…Geochemical characteristics of the E-MORB metabasites in the middle unit of the SMB allows some authors to interpret them as remnants of an oceanic crust (Finger and Steyrer, 1995;Poubová and Sokol, 1992). Janoušek et al (2014) also identified the oceanic crust west of Brunovistulia. Babuška and Plomerová (2013) recognised the existence of two lithospheric slabs on either side of the discussed boundary, with contrasting olivine fabrics in their mantle domains, suggesting the presence of the intervening oceanic lithosphere in the past.…”

Section: The Mtz As the Terrane Boundary Between Saxothuringia And Brmentioning

confidence: 97%

The Moldanubian Thrust Zone — A terrane boundary in the Central European Variscides refined based on lithostratigraphy and U–Pb zircon geochronology

Jastrzębski

Żelaźniewicz

Murtezi

et al. 2015

Lithos

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“…11b). The direct derivation of the biotite granite from the metagranitic basement is yet precluded as its anatexis would likely produce an A-type granite (Patiño Douce 1997;Hanžl et al 2007;Janoušek et al 2014). For that reason, the Cadomian zircon inheritance rather reflects the fact that (Devonian) greywackes are composed of both Devonian arc-derived detritus and material eroded from the Desná Dome Cadomian basement.…”

Section: Biotite Granite and Starost Granodioritementioning

confidence: 99%

Petrogenesis and geochronology of a post-orogenic calc-alkaline magmatic association: the Žulová Pluton, Bohemian Massif

Laurent¹,

Janoušek²,

Magna³

et al. 2014

J. Geosci.

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The Žulová Composite Pluton located at the north-eastern margin of the Bohemian Massif exposes undeformed coexisting mafic-felsic association typical of post-orogenic magmatism. The bulk of the pluton is made of biotite granite and granodiorites along with subordinate quartz monzodiorite. New LA-ICP-MS U-Pb zircon dating revealed a synchronous emplacement of the biotite granite (291 ± 5 Ma), granodiorite and quartz monzodiorite (292 ± 4 Ma). The whole-rock geochemistry and the Sr-Nd isotopic data indicate that a plausible source for the biotite granite and the granodiorite could have been a lithologically inhomogeneous pile of Devonian arc-derived, immature metagreywackes interbedded with volcaniclastics. Melting of this crustal material was probably triggered by the rise of hot basic (quartz monzodioritic) magma which could have been an enriched mantle-derived melt contaminated by the underlying Cadomian basement. The Žulová Composite Pluton is a part of a Late Carboniferous-Early Permian Sudetic Granite Belt, including in addition three large plutonic complexes distributed along major terrane boundaries: the Krkonoše-Jizera, the Strzegom-Sobótka and the Strzelin massifs. The genesis of this magmatic belt was likely induced by the rise of hot mantle-derived magma in the crust while their spatially and temporally discrete emplacement at shallow levels was probably related to the (extensional) reactivation of lithospheric discontinuities at terrane boundaries. Former orogenic wedges, resulting from the inversion of youthful plate margins, represent a feasible fertile source for such post-orogenic granitoids.

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Constraining genesis and geotectonic setting of metavolcanic complexes: a multidisciplinary study of the Devonian Vrbno Group (Hrubý Jeseník Mts., Czech Republic)

Cited by 35 publications

References 91 publications

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

An Integrated Stratigraphy of the Frasnian-Famennian Boundary Interval (Late Devonian) in the Moravian Karst (Czech Republic) and Kellerwald (Germany)

The Moldanubian Thrust Zone — A terrane boundary in the Central European Variscides refined based on lithostratigraphy and U–Pb zircon geochronology

Petrogenesis and geochronology of a post-orogenic calc-alkaline magmatic association: the Žulová Pluton, Bohemian Massif

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