Recurrent Cenozoic volcanic activity in the Bohemian Massif (Czech Republic)

Ulrych, Jaromír; Dostál, J.; Adamović, Jiří; Jelínek, Emil; Špaček, Petr; Hegner, E.; Balogh, Kadosa

doi:10.1016/j.lithos.2010.12.008

Cited by 129 publications

(110 citation statements)

References 47 publications

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“…An up lift of the N block by tens or a few hun dreds of metres must have oc curred be tween the de po si tion of the Merboltice For ma tion (Santonian, 85 Ma) and the on set of basaltic tuff de po si tion (Ústí For ma tion, 36 Ma), as in di cated by com plete ero sion of the Merboltice For ma tion sandstones/subarkoses in the north. This move ment can be at tributed to some of the compressional stress fields of phase a (Adamoviè and Coubal, 1999;Ulrych et al, 2011).…”

Section: Geological Settingmentioning

confidence: 99%

Structural setting of the Čertovka landslide (Ústí nad Labem, Czech Republic): morphostructural analysis and electrical resistivity tomography

Raška

Hartvich

Cajz

et al. 2013

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The Èertovka land slide at Vaòov south of Ústí nad Labem, Czech Re pub lic, is de vel oped in a steep slope of the Labe River val ley (LRV). A ma jor ep i sode of landsliding oc curred in the first months of 1995, and the slope at Vaòov has been sub jected to geo log i cal and geomorphological in ves ti ga tion since then. This pa per pres ents the struc tural set ting of the Èertovka landslide based on the lat est geo log i cal sur vey, de tailed geomorphological map ping, morphostructural anal y sis and re sults of elec tri cal re sis tiv ity to mog ra phy. The land slide was found to be ini ti ated at the bound ary be tween Late Eocene to Oligocene ba saltic lavas above and volcaniclastics be low, with bed ding dip ping against the slope (anaclinal slope). The un der ly ing volcaniclastics show ten dency to argillization and have a much lower rock strength, which acts as an im por tant fac tor of slope in sta bil ity at the site. The Èertovka land slide is a com plex slope de for ma tion con sist ing of sev eral land slides and flowslides, with boul der streams merg ing into a boul der ac cu mu la tion fur ther downslope. The headscarp area of the landslide de vel oped at one of the struc tural lev els built by ba saltic lavas and form ing step-like mor phol ogy of the val ley slope. The headscarp co in cides with the course of a re gional E-W-strik ing Vaòov Fault that un der went mul ti ple tec tonic his tory and is as so ci ated with a dense frac ture sys tem in clud ing smooth slick en sides on the headscarp. Struc tural ob ser va tions com bined with de tailed knowl edge of the anat omy of the land slide based on air borne data, sur face data and geo phys i cal data per mit ted to con clude on struc tural con trols of landsliding and to pre dict fu ture evo lu tion of the slope de for ma tion. Fu ture landsliding will be ini ti ated at struc tural lev els of ba saltic rocks, with the headscarps de vel oped along frac tures par al lel to the Vaòov Fault. The prob a ble grad ual re treat of headscarps at the in di vid ual struc tural lev els along the slope pro file de notes a ret rogres sive land slide style.

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Section: Geological Settingmentioning

confidence: 99%

Structural setting of the Čertovka landslide (Ústí nad Labem, Czech Republic): morphostructural analysis and electrical resistivity tomography

Raška

Hartvich

Cajz

et al. 2013

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“…Rift-related passive asthenospheric upwelling resulted in the generation of large volumes of mantle-derived magmas (e.g. Wilson & Downes 1991;Lustrino & Wilson 2007;Ulrych et al 2011). The presence of an active magmatic source beneath the Bohemian Massif in the western Ohře Rift area was not confirmed by the seismic studies of Babuška et al (2003).The Ohře Rift represents a fundamental Variscan boundary between the Saxothuringian and the Teplá-Barrandian units in the Bohemian Massif (Ziegler 1994;Babuška & Plomerová 2010).…”

Section: Geological Settingmentioning

confidence: 99%

“…1) in the Upper Cretaceous and during the whole Cenozoic. Their production culminated in the pre-rift period (Late Cretaceous to Paleocene) in the Ploučnice River region in northern Bohemia (Ulrych & Pivec 1997;Pivec et al 1998;Ulrych et al 2008Ulrych et al , 2014 and in the late-rift period (Early to Late Pleistocene) in western Bohemia (Ulrych et al 2000a(Ulrych et al , 2011. A non-melilitic ultramafic rock association of Cretaceous age is known from the western part of the Outer Western Carpathians (Szopa et al 2014).…”

Section: G G G G Geol Eol Eolmentioning

confidence: 99%

“…The formation of these rocks culminated during the initial pre-rifting Late Cretaceous to Paleocene period and in the late-rifting Pleistocene volcanic episode of the Cenozoic volcanism (Ulrych et al 2011). The occurrence of melilitic rocks among volcanic rocks of the most widespread Eocene to Miocene syn-rift period is marginal.…”

Section: Melilitic Rock Setting and Age Considerationsmentioning

confidence: 99%

“…Data sources: 1 -this study, 2 - Ulrych et al (2013), 5 -Ulrych et al (2008), 6 -Ulrych et al (2014. Lippolt 1983;Pivec et al 1998;Ulrych et al 2008Ulrych et al , 2011Ulrych et al , 2013 suggested that the intraplate volcanic cycle associated with the Alpine Orogeny already started in the Late Cretaceous.…”

Section: Melilitic Rock Setting and Age Considerationsmentioning

confidence: 99%

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Upper Cretaceous to Pleistocene melilitic volcanic rocks of the Bohemian Massif: petrology and mineral chemistry

Skála¹,

Ulrych²,

Ackerman³

et al. 2015

Geologica Carpathica

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ratios (0.7033-0.7049) point to an additional late-to post-magmatic hydrothermal contribution. Major rock-forming minerals include forsterite, diopside, melilite, nepheline, sodalite group minerals, phlogopite, Cr-and Ti-bearing spinels. Crystallization pressures and temperatures of clinopyroxene vary widely between ~1 to 2 GPa and between 1000 to 1200 °C, respectively. Nepheline crystallized at about 500 to 770 °C. Geochemical and isotopic similarities of these rocks occurring from the Upper Cretaceous to Pleistocene suggest that they had similar mantle sources and similar processes of magma development by partial melting of a heterogeneous carbonatized mantle source.

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Active Magmatic Underplating in Western Eger Rift, Central Europe

et al. 2017

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The Eger Rift is an active element of the European Cenozoic Rift System associated with intense Cenozoic intraplate alkaline volcanism and system of sedimentary basins. The intracontinental Cheb Basin at its western part displays geodynamic activity with fluid emanations, persistent seismicity, Cenozoic volcanism, and neotectonic crustal movements at the intersections of major intraplate faults. In this paper, we study detailed geometry of the crust/mantle boundary and its possible origin in the western Eger Rift. We review existing seismic and seismological studies, provide new interpretation of the reflection profile 9HR, and supplement it by new results from local seismicity. We identify significant lateral variations of the high‐velocity lower crust and relate them to the distribution and chemical status of mantle‐derived fluids and to xenolith studies from corresponding depths. New interpretation based on combined seismic and isotope study points to a local‐scale magmatic emplacement at the base of the continental crust within a new rift environment. This concept of magmatic underplating is supported by detecting two types of the lower crust: a high‐velocity lower crust with pronounced reflectivity and a high‐velocity reflection‐free lower crust. The character of the underplated material enables to differentiate timing and tectonic setting of two episodes with different times of origin of underplating events. The lower crust with high reflectivity evidences magmatic underplating west of the Eger Rift of the Late Variscan age. The reflection‐free lower crust together with a strong reflector at its top at depths of ~28–30 km forms a magma body indicating magmatic underplating of the late Cenozoic (middle and upper Miocene) to recent. Spatial and temporal relations to recent geodynamic processes suggest active magmatic underplating in the intracontinental setting.

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Recurrent Cenozoic volcanic activity in the Bohemian Massif (Czech Republic)

Cited by 129 publications

References 47 publications

Structural setting of the Čertovka landslide (Ústí nad Labem, Czech Republic): morphostructural analysis and electrical resistivity tomography

Structural setting of the Čertovka landslide (Ústí nad Labem, Czech Republic): morphostructural analysis and electrical resistivity tomography

Upper Cretaceous to Pleistocene melilitic volcanic rocks of the Bohemian Massif: petrology and mineral chemistry

Active Magmatic Underplating in Western Eger Rift, Central Europe

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