@article{MTMT:1506683, title = {Recurrent Cenozoic volcanic activity in the Bohemian Massif (Czech Republic)}, url = {https://m2.mtmt.hu/api/publication/1506683}, author = {Ulrych, J and Dostal, J and Adamović, J and Jelínek, E and Špaček, P and Hegner, E and Balogh, Kadosa}, doi = {10.1016/j.lithos.2010.12.008}, journal-iso = {LITHOS}, journal = {LITHOS}, volume = {123}, unique-id = {1506683}, issn = {0024-4937}, abstract = {Cenozoic anorogenic volcanism of the Bohemian Massif is an integral part of the Central European Volcanic Province. The temporal and spatial distribution of volcanic rocks in the Bohemian Massif, their geochemistry and mineralogy as well as their tectonic setting and paleostress data are used to characterize and classify this volcanic activity. Three main volcanic periods can be distinguished based on K-Ar data and known paleostress fields: (i) pre-rift (79-49. Ma), (ii) syn-rift (42-16 Ma) and (iii) late-rift (16-0.3. Ma), with the youngest period further subdivided into three episodes. The dominant mafic rock types (>7wt.% MgO) of all periods are of nephelinite-basanite/tephrite composition. The exceptions are suites of melilitic ultramafic rocks of the pre-rift period in northern Bohemia and of the final episode of the late-rift period in western Bohemia. The most voluminous are volcanic rocks of the syn-rift period occurring in the Ohře Rift Graben.The initial 87Sr/86Sr (0.7032 to 0.7050) and 143Nd/144Nd (0.51264 to 0.51301) ratios of the mafic volcanic rocks of the Bohemian Massif are characteristic of magmas derived from a sub-lithospheric mantle source. The isotopic ratios resemble those of the HIMU mantle source (206Pb/204Pb ca. 19 to 20). These rocks have the most isotopically depleted compositions among the Central European Volcanic Province volcanics. © 2011 Elsevier B.V.}, keywords = {VOLCANISM; rift; tectonic setting; Czech Republic; temporal distribution; Cenozoic; isotopic ratio; mantle source; igneous geochemistry; BOHEMIAN MASSIF; Isotopic composition; stress field; spatial distribution; paleostress; Paleostress fields; Mantle; Alkaline volcanism; Earth, Cosmic and Environm. Res.,}, year = {2011}, eissn = {1872-6143}, pages = {133-144} } @article{MTMT:3169051, title = {From the Variscan to the Alpine Orogeny: crustal structure of the Bohemian Massif and the Western Carpathians in the light of the SUDETES 2003 seismic data.}, url = {https://m2.mtmt.hu/api/publication/3169051}, author = {P, Hrubcova and P, Sroda and M, Grad and W H, Geissler and Hegedűs, Endre and Bodoky, Tamás János and Takács, Ernő}, doi = {10.1111/j.1365-246X.2010.04766.x}, journal-iso = {GEOPHYS J INT}, journal = {GEOPHYSICAL JOURNAL INTERNATIONAL}, volume = {183}, unique-id = {3169051}, issn = {0956-540X}, year = {2010}, eissn = {1365-246X}, pages = {611-633} } @article{MTMT:150584, title = {Late Cretaceous to Paleocene melilitic rocks of the Ohre/Eger Rift in northern Bohemia, Czech Republic: Insights into the initial stages of continental rifting}, url = {https://m2.mtmt.hu/api/publication/150584}, author = {Ulrych, J and Dostal, J and Hegner, E and Balogh, Kadosa and Ackerman, L}, doi = {10.1016/j.lithos.2007.07.012}, journal-iso = {LITHOS}, journal = {LITHOS}, volume = {101}, unique-id = {150584}, issn = {0024-4937}, year = {2008}, eissn = {1872-6143}, pages = {141-161} } @article{MTMT:3169055, title = {3D structure of the Earth's crust beneath the northern part of the Bohemian Massif.}, url = {https://m2.mtmt.hu/api/publication/3169055}, author = {Mariusz, Majdański and Elena, Kozlovskaya and Marek, Grad and SUDETES, 2003 Working Group}, doi = {10.1016/j.tecto.2007.02.015}, journal-iso = {TECTONOPHYSICS}, journal = {TECTONOPHYSICS}, volume = {437}, unique-id = {3169055}, issn = {0040-1951}, keywords = {BOHEMIAN MASSIF}, year = {2007}, eissn = {1879-3266}, pages = {17-36} } @article{MTMT:2537236, title = {2-D seismic tomographic and ray tracing modelling of the crustal structure across the Sudetes Mountains basing on SUDETES 2003 experiment data}, url = {https://m2.mtmt.hu/api/publication/2537236}, author = {Mariusz, Majdanski and Marek, Grad and Aleksander, Guterch and SUDETES, 2003 Working Group}, doi = {10.1016/j.tecto.2005.10.042}, journal-iso = {TECTONOPHYSICS}, journal = {TECTONOPHYSICS}, volume = {413}, unique-id = {2537236}, issn = {0040-1951}, keywords = {seismic tomography; SUDETES 2003 refraction profiles}, year = {2006}, eissn = {1879-3266}, pages = {249-269} } @article{MTMT:149704, title = {Quartz and feldspar zoning in the eastern Erzgebirge volcano-plutonic complex (Germany, Czech Republic): evidence of multiple magma mixing}, url = {https://m2.mtmt.hu/api/publication/149704}, author = {Müller, A and Breiter, K and Seltmann, R and Pécskay, Zoltán}, doi = {10.1016/j.lithos.2004.05.011}, journal-iso = {LITHOS}, journal = {LITHOS}, volume = {80}, unique-id = {149704}, issn = {0024-4937}, abstract = {Zoned quartz and feldspar phenocrysts of the Upper Carboniferous eastern Erzgebirge volcano-plutonic complex were studied by cathodoluminescence and minor and trace element profiling. The results verify the suitability of quartz and feldspar phenocrysts as recorders of differentiation trends, magma mixing and recharge events, and suggest that much heterogeneity in plutonic systems may be overlooked on a whole-rock scale. Multiple resorption surfaces and zones, element concentration steps in zoned quartz (Ti) and feldspar phenocrysts (anorthite content, Ba, Sr), and plagioclase-mantled K-feldspars etc. indicate mixing of silicic magma with a more mafic magma for several magmatic phases of the eastern Erzgebirge volcano-plutonic complex. Generally, feldspar appears to be sensitive to the physicochemical changes of the melt, whereas quartz phenocrysts are more stable and can survive a longer period of evolution and final effusion of silicie magmas. The regional distribution of mixing-compatible textures suggests that magma mingling and mixing was a major process in the evolution of these late-Variscan granites and associated volcanic rocks. Quartz phenocrysts from 14 magmatic phases of the eastern Erzgebirge volcano-plutonic complex provide information on the relative timing of different mixing processes, storage and recharge, allowing a model for the distribution of magma reservoirs in space and time. At least two levels of magma storage are envisioned: deep reservoirs between 24 and 17 km (the crystallisation level of quartz phenocrysts) and subvolcanic reservoirs between 13 and 6 km. Deflation of the shallow reservoirs during the extrusion of the Teplice rhyolites triggered the formation of the Altenberg-Teplice caldera above the eastern Erzgebirge volcano-plutonic complex. The deep magma reservoir of the Teplice rhyolite also has a genetic relationship to the younger mineralised A-type granites, as indicated by quartz phenocryst populations. The pre-caldera. biotite granites and the rhyodacitic Schonfeld volcanic rocks represent temporally and spatially separate magma sources. However, the deep magma reservoir of both is assumed to have been at a depth of 24-17 km. The drastic chemical contrast between the pre-caldera Schonfeld (Westfalian B-C) and the syn-caldera Teplice (Westfalian C-D) volcanic rocks is related to the change from lateorogenic geotectonic environment to post-orogenic faulting, and is considered an important chronostratigraphic marker. (C) 2004 Elsevier B.V. All rights reserved.}, year = {2005}, eissn = {1872-6143}, pages = {201-227} }