Variscan tectonics

Kroner, Uwe; Mansy, Jean-Louis; Mazur, Stanisław; Aleksandrowski, Paweł; Hann, Horst Peter; Huckriede, Hermann; Lacquement, Frédéric; Lamarche, Juliette; Ledru, Patrick; Pharaoh, T. C.; Zedler, Hubert; Zeh, Armin; Zulauf, Gernold

doi:10.1144/cev1p.11

Cited by 51 publications

(41 citation statements)

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“…The west ern ex ten sion of this zone turns to the SW, pass ing into the Mid-Ger man Crys tal line High (Wonik et al, 2001;Ga briel et al, 2011). The lat ter struc ture is in ter preted as the NW mar gin of the Saxothuringian Zone of the Cen tral Eu ropean Variscides (Franke, 2000;Kro ner et al, 2008) cor respond ing to the Rheic Su ture be tween the Saxothuringian and Rhenohercynian belts.…”

Section: Sudetic Domainmentioning

confidence: 98%

“…This Moravian-Silesian Su ture is a com plex, few kilometres-wide tec tonic zone in clined to the WNW, cor re spond ing to the Staré Mìsto Belt and its north ern con tin u a tion in the Fore-Sudetic Block Kro ner et al, 2008;Jastrzêbski, 2012). The po ten tial field data ana lysed do not con firm the north ward ex ten sion of the su ture as far as the TTZ, la belled the "Moravian Line" (Winchester et al, 2002) or "Moravian Su ture" (Pha raoh et al, 2006; see also the dis cussion by Dadlez et al, 2005).…”

Section: Sudetic Domainmentioning

confidence: 98%

“…It has been con sid ered to cor respond to the Odra Fault (e.g., Kro ner et al, 2008) or to the Dolsk Fault . The lat ter fault lim its from the NE the Wolsztyn-Leszno High form ing the sub-Perm ian el e va tion of a strongly tectonized and partly metamor phosed Variscan com plex (Grocholski, 1975;Mazur et al, 2010).…”

Section: Sudetic Domainmentioning

confidence: 99%

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Basement structure of the Paleozoic Platform in Poland

Narkiewicz

Petecki

2017

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1 Pol ish Geo log i cal In sti tute -Na tional Re search In sti tute, Rakowiecka 4, 00-975 Warszawa, Po land Narkiewicz, M., Petecki, Z., 2017. Base ment struc ture of the Pa leo zoic Plat form in Po land. Geo log i cal Quar terly, 61 (2): 502-520, doi: 10.7306/gq.XXXX The Pa leo zoic Plat form com prises the south west ern half of the Pol ish ter ri tory, sep a rated from the Pre cam brian East Eu ropean Plat form (EEP) by a NW-SE trending subvertical lithospheric-scale dis con ti nu ity -the Teisseyre-Tornquist Zone. In the pres ent study, the Pa leo zoic Plat form base ment is sub di vided based on geo log i cal and geo phys i cal ev i dence ac quired dur ing the last de cades, in clud ing deep seis mic re frac tion and re flec tion re sults, as well as grav ity, mag netic and magnetotelluric data. The units ad ja cent to the EEP, the Mid-Pol ish Do main (com pris ing the £ysogóry Block) and the Pom era nian Block, are char ac ter ized by a thinned three-layer EEP-type crys tal line crust (age 1.7-3.7 Gy). Their old est plat form cover is prob a bly com posed of thick Ediacaran syn-rift sed i men tary and vol ca nic rocks. Their west ern ex ten sion in the contig u ous Ger man and Bal tic area can be traced as far as the East Elbian Mas sif and Thor Su ture based mainly on mag netic anom aly pat terns. The Up per Silesian and Ma³opolska blocks lo cated in SE Po land are char ac ter ized by Cadomian (660-600 My) base ment over lain by the thick de formed Ediacaran foredeep de pos its. Whereas the units with the EEP-type base ment are in ter preted as prox i mal ter ranes dis placed along the EEP mar gin dur ing the late Early Pa leo zoic, the blocks with a Cadomian base ment are con ceived as ex otic ter ranes of a pos si ble Gondwanan prov e nance. All these ter ranes were accreted ul ti mately dur ing the fi nal, lat est Si lu rian stages of the Cal edo nian de for ma tion al though the ex act sce nario of the amal gam ation re mains hy po thet i cal. The Sudetic Do main in SW Po land is a col lage of dif fer ent crustal units jux ta posed ul timately in the Penn syl va nian (ca. 310 Ma) dur ing the fi nal ep i sodes of the Variscan Orog eny. Their north ern bound ary cor responds to the Rheic Su ture trace able in mag netic and grav ity anom a lies pat tern along the north ern mar gin of the Wolsztyn-Leszno High, and con tin u ing west wards along the Mid-Ger man Crys tal line High. The ar cu ate trace of the su ture in the NE is dextrally dis placed along the Odra Fault, and con tin ues south wards where it is mapped as the Moravian-Silesian Su ture.

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Section: Sudetic Domainmentioning

confidence: 98%

Section: Sudetic Domainmentioning

confidence: 98%

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Basement structure of the Paleozoic Platform in Poland

Narkiewicz

Petecki

2017

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“…The USB was formed dur ing the fi nal stages of the evo lu tion of the Moravo-Silesian Pa leo zoic Ba sin (Unrug, 1966), sit u ated in the east ern do main of the Cen tral Eu ro pean Variscides (Kro -ner et al, 2008). The USB is a typ i cal ex am ple of the fore land basin of the Variscan Orogen, later en closed in the outer zones of the orogenic belt, termed Rhenohercynicum and Subvariscicum (Kumpera and Martinec, 1995;Narkiewicz, 2007).…”

Section: Geological Settingmentioning

confidence: 99%

Coal-bearing capacity of the Petřkovice Member (Ostrava Formation, Serpukhovian, Mississippian) of the Upper Silesian Basin (Czech Republic and Poland)

Hýlová

Jirásek

Martin

et al. 2016

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The Petøkovice Mem ber is the basal unit of the paralic suc ces sion of the Ostrava For ma tion of the Up per Silesian Ba sin. This mem ber is a valu able source of in for ma tion about the tran si tion from a ma rine ba sin filled with siliciclastic sed i ments into a paralic ba sin with the be gin ning of coal-bear ing sed i men ta tion. Mod els of: (1) the num ber of coal seams, (2) their to tal thickness, and (3) the coal con tent with re spect to the to tal thick ness of the suc ces sion were cre ated to de scribe and as sess the coal-bear ing ca pac ity of the Petøkovice Mem ber. The au thors pres ent mod els for coal seam thick nesses ex ceed ing ei ther 10 or 40 cm. The coal-bear ing ca pac ity of the Petøkovice Mem ber is very low. The av er age share of coal seams thicker than 0.1 m is 3%. The share of coal seams with a thick ness that ex ceeds 0.4 m is only 1.66%. More over, in large ar eas of the basin, in the N and NE parts, the coal-bear ing ca pac ity is close to zero, be cause coal seams of greater thick ness were de tected only lo cally there. Based on these mod els and on other geo log i cal data, it is ob vi ous that the on set of coal sed i men ta tion was grad ual and lim ited to par tic u lar sites show ing the great est sub si dence of the ba sin floor. In places where mi nor sub si dence took place, there were likely un fa vor able con di tions for ac cu mu la tion of or ganic mat ter.

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“…Variscan processes of considerable intensity occurred in the territory of present-day Central Europe because of its location in the collision zone. The emerging Variscan orogeny also incorporated older, particularly Cadomian consolidated blocks such as the Vosges, the Black Forest and the Bohemian Massif (Kroner et al 2008). The regressive nature of Middle Devonian sediments and subsequent termination of sedimentation in the Prague Basin reflect the onset of the Variscan Orogeny, which culminated in the Bohemian Massif in the Late Visean.…”

Section: Introductionmentioning

confidence: 99%

Significant hiatuses in the terrestrial Late Variscan Central and Western Bohemian basins (Late Pennsylvanian–Early Cisuralian) and their possible tectonic and climatic links

Martínek¹,

Pešek²,

Opluštil³

2017

Geologica Carpathica

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Significant changes in the stratigraphy of the Central and Western Bohemian Upper Palaeozoic basins occur during or shortly after hiatuses. The different extent and changes in the depocentres of the Radnice and Nýřany members (Moscovian) in the Plzeň Basin clearly indicate changes in the structure of this basin taking place during a break in sedimentation between these two units (311.9-308.3 Ma). Thick weathered rocks that occur in boreholes in the Mšeno-Roudnice Basin indicate another sedimentation break (305.9-304.1 Ma) between the Nýřany Member and the Týnec Formation (Kasimovian). Another possible hitherto undiscovered hiatus occurred between the Týnec and Slaný formations (Kasimovian-Gzhelian, about 304-303 Ma). The most significant changes in the configuration of the basins occurred between the Slaný and Líně formations (Gzhelian-Asselian, 301.6-300.6 Ma). This is indicated by deeply cut river valleys at the top of the Slaný Formation, by high thickness of weathered deposits occurring immediately beneath the Líně Formation, and mainly by the shift of depocentres from the southern to the northern part of the Central Bohemian basins. The hiatuses between the Radnice and Nýřany members and between the Slaný and Líně formations are accompanied by significant changes in the depocentres, and they are therefore interpreted primarily as tectonic events related to the extensional collapse of the Variscan orogenic belt. By contrast, the hiatuses beneath and above the Týnec Formation are interpreted as being the products of lower sedimentation rates during drier climates, which is consistent with the characteristics of the sediments, correlation with other Central European basins, and with climate models for this period. Due to the characteristics of the Líně Formation, in which the effects of climate aridization are clearly seen, the authors presume that tectonic as well as climatic changes occurred at the hiatus between the Slaný and Líně formations.

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Variscan tectonics

Cited by 51 publications

References 0 publications

Basement structure of the Paleozoic Platform in Poland

Basement structure of the Paleozoic Platform in Poland

Coal-bearing capacity of the Petřkovice Member (Ostrava Formation, Serpukhovian, Mississippian) of the Upper Silesian Basin (Czech Republic and Poland)

Significant hiatuses in the terrestrial Late Variscan Central and Western Bohemian basins (Late Pennsylvanian–Early Cisuralian) and their possible tectonic and climatic links

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