Terrane boundaries in the Bohemian Massif: Result of large-scale Variscan shearing

Matte, Philippe; Maluski, H.; Rajlich, Petr; Franke, Wolfgang

doi:10.1016/0040-1951(90)90279-h

Cited by 401 publications

(204 citation statements)

References 35 publications

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“…100 km across, which splits into more discrete faulted domains, as shown in Figs 4-6. This concept is different from the definition of the "Elbe Fracture" or "Elbe Fault" as a narrow, mainly ductile shear zone in Arthaud & Matte (1977), Matte et al (1990), or as used by Mattern (1996) in his concept of the "Elbe Zone".…”

Section: Basement Units and Main Fault Systemsmentioning

confidence: 82%

“…The basement of the BCB (Fig. 4) involves most of the zones of the Variscan orogen (Kossmat 1927, Matte et al 1990, among many others; see Kroner et al 2008, andCháb et al 2008 for recent compilations). The Saxothuringian Zone, dominated by high-pressure metamorphics in the northwestern part of the region, is separated by a generally WSW-ENE-trending suture from the neighbouring Teplá-Barrandian Zone (Fig.…”

Section: Basement Units and Main Fault Systemsmentioning

confidence: 99%

“…5). The Teplá-Barrandian Zone comprises mostly non-metamorphosed sediments and low-grade metasediments, with the metamorphic grade increasing towards the suture (e.g., Matte et al 1990, Beard et al 1995, Franke et al 2000, Dörr et al 2002. Further east and southeast, the high-grade metamorphics of the Moldanubian Zone and its likely equivalent in the Lugian Zone to the N-NE (Suess 1912;cf.…”

Section: Basement Units and Main Fault Systemsmentioning

confidence: 99%

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Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling

Uličný¹,

Špičáková²,

Grygar³

et al. 2009

Bull. Geosci.

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This study presents a synthesis of currently available data on the distribution of Cenomanian-age palaeodrainage systems in the Bohemian Cretaceous Basin, filled by fluvial and estuarine strata, and an interpretation of their relationships to the basement units and fault systems. Much of the progress, compared to previous studies, was made possible by a recent basin-scale evaluation of Cenomanian genetic sequence stratigraphy. Several local palaeodrainage systems developed in the basin, separated by drainage divides of local importance and one major divide -the Holice-Nové Město Palaeohigh -which separated the drainage basins of the Tethyan and Boreal palaeogeographic realms. The locations and directions of palaeovalleys were strongly controlled by the positions of inherited Variscan basement fault zones, whereas the bedrock lithology had the subordinate effect of narrowing or broadening valleys on more vs. less resistant substratum, respectively. The intrabasinal part of the palaeodrainage network followed the slopes toward the Labe (Elbe) System faults and was strongly dominated by the conjugate, NNE-trending, Jizera System faults and fractures. Outlet streams -ultimate trunk streams that drained the basin area -are interpreted to have followed the Lužice Fault Zone toward the Boreal province to the Northwest, and the Železné hory Fault Zone toward the Tethyan province to the Southeast. At both the northwestern and southeastern ends of the Bohemian Cretaceous Basin, shallow-marine or estuarine conditions are proven to have existed during the early Cenomanian. Direct evidence for syn-depositional subsidence during the early to mid-Cenomanian, fluvial to estuarine phase is very rare, and the onset of deposition by fluvial backfilling of the palaeodrainage systems was driven mainly by the long-term rise in global sea level. Subtle surface warping, mostly without detectable discrete faulting, is inferred to have been a response to the onset of the palaeostress regime that later, with further stress accumulation, led to subsidence in fault-bounded depocentres of the Bohemian Cretaceous Basin and uplift of new source areas. •

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Section: Basement Units and Main Fault Systemsmentioning

confidence: 82%

Section: Basement Units and Main Fault Systemsmentioning

confidence: 99%

Section: Basement Units and Main Fault Systemsmentioning

confidence: 99%

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Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling

Uličný¹,

Špičáková²,

Grygar³

et al. 2009

Bull. Geosci.

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“…The West Sudetes are considered a part the Saxothuringian Zone; the Central Sudetes are parts of Teplá-Barrandian and Moldanubian Zones (Fig. 1b) (Mazur et al 2006;Franke 2012), all interpreted by some authors as terranes (Matte et al 1990) of the Armorican Terrane Assemblage (Franke 2000). Brunovistulicum (Bruno-Vistulicum after Dudek 1980) is interpreted as an individual microcontinent (Pharaoh 1999;Schulmann and Gayer 2000) of the Avalonian affinity Friedl et al 2000).…”

Section: Regional Context and Cloos' Granite Tectonics Studiesmentioning

confidence: 99%

Sequential granite emplacement: a structural study of the late Variscan Strzelin intrusion, SW Poland

Oberc-Dziedzic

Kryza

et al. 2013

Int J Earth Sci (Geol Rundsch)

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The Strzelin Massif in SW Poland (Central European Variscides) records a protracted igneous evolution, with three main magmatic stages: (1) tonalitic I, (2) granodioritic and (3) tonalitic II/granitic. In the northern part of this Massif, the Strzelin intrusion proper comprises three successively emplaced rock types: a medium-grained biotite granite (303 ± 2 Ma), a fine-grained biotite granite (283 ± 8 Ma) and a fine-grained biotite-muscovite granite; based on field evidence, the third variety postdates both types of the biotite granites. The structural data from the three granites, including their parallel, approximately E-W striking and steeply dipping lithological contacts and ENE-WSW trending subhorizontal magmatic lineations, suggest that the emplacement of all three successive granite varieties was controlled by an active, long-lived strike-slip fault, striking ESE-WNW, with a dextral sense of movement. After the emplacement of the youngest biotitemuscovite granite, the intrusion underwent brittle extension which produced ''Q joints'' striking NNW-SSE to N-S and dipping at 55-70°WSW to W, and showing evidence of broadly N-S directed sinistral displacements. The structural observations, supported by new geochronological data, indicate that the internal structure of the composite granitoid intrusion, including the faint magmatic foliation and lineation, formed in a long-lived strike-slip setting, different from the subsequent, post-emplacement extensional tectonics that controlled the development of brittle structures.

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“…1). Apart from tectonically displaced segments of the Early Proterozoic basement (e.g., ~2.1 Ga Světlík orthogneiss in S Bohemia: Wendt et al 1993;~1.38 Ga Dobra orthogneiss in Lower Austria: Gebauer and Friedl 1994), the allochthonous Moldanubian sequence has been subdivided into a structurally lower and mainly metasedimentary, amphibolite-facies Drosendorf and above this, a higher grade Gföhl assemblages (Fuchs and Matura 1976;Matte et al 1990;Fiala et al 1995;Franke 2000).…”

Section: Moldanubian Zonementioning

confidence: 99%

Hyperpotassic granulites from Blanský les (Moldanubian Zone, Bohemian Massif) revisited

Janoušek¹,

Krenn²,

Finger³

et al. 2012

J. Geosci.

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In the Blanský les granulite Massif (Moldanubian Unit, South Bohemia), built mainly by felsic calc-alkaline HP-HT garnet ± kyanite granulite, occur rare small bodies of hyperpotassic granulite with garnet (Plešovice type) or pyroxene (Lhotka type). The Plešovice type is dominated by slightly perthitic K-feldspar and almandine-pyrope rich garnet, the latter variously retrogressed to biotite ± plagioclase. The other conspicuous euhedral crystals are apatite and zircon. In the rock occur also Zr-Nb-rich rutile and much rarer primary monazite; originally LREE-rich apatites decompose into small Th-poor, MREE-rich monazite grains. The Lhotka type granulites contain pyroxene, often altered to actinolite, instead of garnet. The predominant perthitic K-feldspar encloses a small amount of unmixed celsian. Typical are large euhedral crystals of apatite with small unmixed monazite grains; primary monazite is rare. Noteworthy is the occurrence of secondary Ti phases with high REE, Y and Zr, formed at the expense of the primary pyroxene. The studied granulite types are highly potassic (K 2 O > 7 %, up to c. 14 %, K 2 O/Na 2 O = 3.1-9.2 wt. %), silica-poor (SiO 2 < 65 %), with low contents of most major-and minor-element oxides, apart from K and P. Characteristic are high concentrations of Cs, Rb, Ba and U at variable enrichments in Zr and Hf. Whole-rock contents some HFSE (Ti, Nb and Ta) are extremely low. The REE patterns show marked negative Eu anomalies and variable LREE enrichments increasing with rising silica due to a conspicuous drop in HREE. The Sr-Nd isotopic ratios document the derivation Sr/ 86 Sr 337 = 0.7109 for the Lhotka types). Apatite saturation temperatures are high (~1070 °C), close to the previously estimated conditions of (re)crystallization for both calc-alkaline and hyperpotassic granulites. The zircon saturation temperatures tend to be more variable, some exceeding 1000 °C but many unrealistically low, reflecting effects of disequilibrium melting, heterogeneous distribution of accumulated crystals in the magma and/or sampling bias. The hyperpotassic granulites are interpreted as Viséan igneous rocks. The parental magma could have originated by low degrees of HP-HT, non-eutectic partial melting. The low-scale melt was most likely expelled close to the HP-HT metamorphic peak or at early stages of decompression from common Moldanubian calc-alkaline granulites. This genetic link is documented by the presumed P-T conditions, similar age and complementary geochemical and Sr-Nd isotopic signatures. Subsequently the magma could have developed by garnet, apatite and zircon dominated fractional crystallization, with or without some crystal accumulation.

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Terrane boundaries in the Bohemian Massif: Result of large-scale Variscan shearing

Cited by 401 publications

References 35 publications

Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling

Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling

Sequential granite emplacement: a structural study of the late Variscan Strzelin intrusion, SW Poland

Hyperpotassic granulites from Blanský les (Moldanubian Zone, Bohemian Massif) revisited

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