Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling?

Plomerová, Jaroslava; Achauer, U.; Babuška, Vladislav; Vecsey, Luděk

doi:10.1111/j.1365-246x.2007.03361.x

Cited by 82 publications

(69 citation statements)

References 33 publications

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“…This result confirms a separate development of the Cadomian TBU block, an "undigested" microcontinent, which was only little affected by Variscan shortening, metamorphism and granitoid intrusion (Franke, 2000). A dense network of mobile and permanent seismic stations distributed in the western BM within the international BOHEMA experiment (Babuška et al, 2003) allowed Plomerová et al (2006) to delineate boundaries of the three mantle lithospheres characterized by different orientations of mantle A c c e p t e d M a n u s c r i p t olivine fabrics. The boundaries are marked by a "no P pattern", or by changes in the high-velocity directions (Fig.…”

Section: Accepted Manuscriptsupporting

confidence: 62%

“…Therefore, we have firstly relocated the earthquakes that occurred in the region during [1991][1992][1993][1994][1995][1996][1997][1998][1999][2000][2001][2002][2003][2004]. Based on teleseismic tomography and seismic anisotropy, we have studied in detail the lithosphere-asthenosphere system beneath the western BM especially boundaries of the three mantle units, already located in a companion paper by Plomerová et al (2006). The aim of this paper is to discuss the causes of the earthquake swarms in the western BM (e.g., Neunhöfer and Hemmann, 2005).…”

Section: E-mail Address: Vbabuska@igcasczmentioning

confidence: 99%

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Intraplate seismicity in the western Bohemian Massif (central Europe): A possible correlation with a paleoplate junction

Babuška¹,

Plomerová²,

Fischer³

2007

Journal of Geodynamics

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Please cite this article as: Babuška, V., Plomerová, J., Fischer, T., Intraplate seismicity in the western Bohemian Massif (central Europe): A possible correlation with a paleoplate junction, Journal of Geodynamics (2007Geodynamics ( ), doi:10.1016Geodynamics ( /j.jog.2007 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Accepted Manuscriptsupporting

confidence: 62%

Section: E-mail Address: Vbabuska@igcasczmentioning

confidence: 99%

Intraplate seismicity in the western Bohemian Massif (central Europe): A possible correlation with a paleoplate junction

Babuška¹,

Plomerová²,

Fischer³

2007

Journal of Geodynamics

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“…USArray (www.usarray.org) or IberArray (http:// iberarray.ictja.csic.es/; Díaz et al, 2010) represent the largescale temporary networks, whereas for example TRANSALP (Lippitsch et al, 2003) or BOHEMA (Plomerová et al, 2007) belong to small-scale passive experiments in central Europe. Participants of the AlpArray project, the European collaborative geoscience initiative, deployed the largest network of temporary broadband (BB) stations ever perPublished by Copernicus Publications on behalf of the European Geosciences Union.…”

Section: Introductionmentioning

confidence: 99%

Data quality control and tools in passive seismic experiments exemplified on the Czech broadband seismic pool MOBNET in the AlpArray collaborative project

Vecsey

Plomerová

Jedlička

et al. 2017

Geosci. Instrum. Method. Data Syst.

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Abstract. This paper focuses on major issues related to the data reliability and network performance of 20 broadband (BB) stations of the Czech (CZ) MOBNET (MOBile NETwork) seismic pool within the AlpArray seismic experiments. Currently used high-resolution seismological applications require high-quality data recorded for a sufficiently long time interval at seismological observatories and during the entire time of operation of the temporary stations. In this paper we present new hardware and software tools we have been developing during the last two decades while analysing data from several international passive experiments. The new tools help to assure the high-quality standard of broadband seismic data and eliminate potential errors before supplying data to seismological centres. Special attention is paid to crucial issues like the detection of sensor misorientation, timing problems, interchange of record components and/or their polarity reversal, sensor mass centring, or anomalous channel amplitudes due to, for example, imperfect gain. Thorough data quality control should represent an integral constituent of seismic data recording, preprocessing, and archiving, especially for data from temporary stations in passive seismic experiments. Large international seismic experiments require enormous efforts from scientists from different countries and institutions to gather hundreds of stations to be deployed in the field during a limited time period. In this paper, we demonstrate the beneficial effects of the procedures we have developed for acquiring a reliable large set of high-quality data from each group participating in field experiments. The presented tools can be applied manually or automatically on data from any seismic network.

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“…The thermal thickness of the lithosphere at the level of the 1 300 °C isotherm has been modelled to be 110-170 km, whereas the mechanical thickness is only 65-90 km (Babuška and Plomerová 1992;Goes et al 2000). Plomerová et al (2007) with Babuška and Plomerová (this volume) found clear differences in the orientations of seismic anisotropy in the three major tectonic units (Saxothuringian, Moldanubian and Teplá-Barrandian), but no signs for the existence of plume-like structures in the mantle. The region shows evidence for repeated magmatic phases before the Tertiary but most of the Eger Rift lavas erupted between 30 and 15 Ma both within the rift and on its NW flank (Todt and Lippolt 1975;Pilot et al 1984;Kaiser and Pilot 1986;Ulrych et al 2002).…”

Section: Geological Settingmentioning

confidence: 99%

Clinopyroxene from basaltic rocks of the Erzgebirge - Krušné hory Mts. - implications for modelling the magmatic plumbing system

Ronick¹,

Renno

2012

J. Geosci.

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The Erzgebirge-Krušné hory area is part of the NW flank of the Eger-Ohře Rift. Within this rift-related area, basaltic rocks with low (< 3.5 wt. %) and high contents (> 3.5 wt. %) of TiO 2 occur. The distribution of these basaltic rock types shows strong spatial dependency. Ti-rich basalts are concentrated in the western Erzgebirge-Krušné hory Mts. with a sharp change at longitude 13.3 °E. Clinopyroxene and olivine are the most abundant phenocrysts. The zoning and chemistry of the clinopyroxene act as a recorder of the different stages of the magmatic plumbing systems. Seven different types of clinopyroxene phenocrysts are defined with four distinct chemical types: Cr-rich clinopyroxene, green-core pyroxene, Mg-rich clinopyroxene and finely zoned Ti-rich clinopyroxene with sector zoning. Chemical and petrographic analysis of individual zones within clinopyroxenes allows the qualitative description of distinct steps of the multistage, regionally diverse processes yielding to the formation of both Ti-rich basalts in the W as well as Ti-poor basalts in the E. Two different types of asthenospheric melts are suggested, with increased activities of H 2 O and potassium in the western Erzgebirge Mts. During ascent they incorporated xenoliths and xenocrysts of both the mantle (peridotite, olivine and Cr-rich clinopyroxene) and the crustal (granitic and gneissic rocks, quartz and feldspar) origin. Furthermore, green cores of clinopyroxene were introduced into the magmas. Fractionation processes took place within lithospheric magma chambers, having been accompanied by reaction of xenocrysts and xenoliths with the melt. The residence time in the magma chambers associated with the eastern and western parts of the Erzgebirge appears to have been totally different: short in the eastern and long in the western parts. Within the latter, no mantle-derived xenoliths, xenocrysts, or magmatic olivines are found. It is inferred that these xenoliths and crystals settled to the bottom of the magma chambers forming cumulates and therefore did not come to the surface. In contrast, the basaltic rocks of the East still contain mantle-derived xenoliths and xenocrysts as well as magmatic olivine. The size and amount of clinopyroxene phenocrysts in the West significantly exceed that of the East. Moreover, the crystallization of giant clinopyroxenes was restricted to the western region. Mixing of the magmas with Ti-rich melts, presumably derived from an eclogitic source, took place in crustal magma chambers. In any case, the proportion of Ti-rich melts in the West significantly exceeded that of the East.

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Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling?

Cited by 82 publications

References 33 publications

Intraplate seismicity in the western Bohemian Massif (central Europe): A possible correlation with a paleoplate junction

Intraplate seismicity in the western Bohemian Massif (central Europe): A possible correlation with a paleoplate junction

Data quality control and tools in passive seismic experiments exemplified on the Czech broadband seismic pool MOBNET in the AlpArray collaborative project

Clinopyroxene from basaltic rocks of the Erzgebirge - Krušné hory Mts. - implications for modelling the magmatic plumbing system

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