Detailed Information on Publication Record
2011
Recurrent Cenozoic volcanic activity in the Bohemian Massif (Czech Republic)
ULRYCH, Jaromír, Jaroslav DOSTAL, Jiří ADAMOVIČ, Emil JELÍNEK, Petr ŠPAČEK et. al.Basic information
Original name
Recurrent Cenozoic volcanic activity in the Bohemian Massif (Czech Republic)
Authors
ULRYCH, Jaromír (203 Czech Republic), Jaroslav DOSTAL (124 Canada), Jiří ADAMOVIČ (203 Czech Republic), Emil JELÍNEK (203 Czech Republic), Petr ŠPAČEK (203 Czech Republic, guarantor, belonging to the institution), Ernst HEGNER (276 Germany) and Kadosa BALOGH (348 Hungary)
Edition
Lithos, 2011, 0024-4937
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10500 1.5. Earth and related environmental sciences
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 3.246
RIV identification code
RIV/00216224:14310/11:00056501
Organization unit
Faculty of Science
UT WoS
000289335800010
Keywords in English
Bohemian Massif; Cenozoic; Alkaline volcanism; Paleostress fields; Rift Mantle
Změněno: 20/4/2012 12:23, Ing. Andrea Mikešková
Abstract
V originále
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 (N7 wt.% 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 themost isotopically depleted compositions among the Central European Volcanic Province volcanics.