Origin and the Silurian odyssey of the Brunovistulian terrane: paleomagnetic evidence from the Brno Massif (central Europe).

2020 ◽  
Author(s):  
Jerzy Nawrocki ◽  
Jaromir Leichmann ◽  
Magdalena Pańczyk
Keyword(s):  
Central Europe ◽  
Time Characteristic ◽  
Massif Central ◽  
Northern Margin ◽  
East European ◽  
Rheic Ocean ◽  
Crustal Block ◽  
Gondwana Margin ◽  
Isotope Studies ◽  
Isotope Dating

<p>The Brno Massif forms a part of larger tectonostratigraphic unit named the Brunovistulian Terrane (BVT) that is one of crustal block of Europe with the Neoproterozic basement.  However, the Neoproterozoic orogenic belt was developed in wide area i.e. along the Gondwana margin and near the present day eastern and southern edge of the East European Craton. For more than 20 years, the problem of primary setting of the BVT inside the Neoproterozic orogenic  belt have been discussed. Also the path of their drift and  time of their final accretion have been a matter of debate. To solve these problems the paleomagnetic and isotope studies of vertical intrusions cutting the BVT basement near Brno in Moravia have been undertaken. Preliminary isotope dating of granitic and basaltic intrusions points to the early Silurian age of them. Results of demagnetization of paleomagnetic samples from three localities revealed the presence of stable components with a steep inclination, at that time characteristic for the northern margin of Gondawana but not for the Baltica paleocontinent that during the Silurian was situated between the equator and 30<sup>o</sup>S. The Emsian  “old red” type deposits may indicate that final amalgamation of the BVT took place some-time between the Silurian and the Devonian. This time of joining of the BVT  to Baltica and quite high (50 – 60<sup>o</sup>S) paleolatitudes obtained from the early Silurian rocks of the Brno Massif  point to a rapid drift of the BVT across the Rheic Ocean during the Silurian.</p>

scholarly journals Joint analysis of the magnetic field and Total Gradient Intensity in Central Europe

2019 ◽  
Author(s):  
Maurizio Milano ◽  
Maurizio Fedi ◽  
J. Derek Fairhead
Keyword(s):  
Magnetic Field ◽  
Central Europe ◽  
Joint Analysis ◽  
East European ◽  
Long Wavelength ◽  
Low Degree ◽  
Total Gradient ◽  
Synthetic Models ◽  
The Magnetic Field ◽  
Different Altitudes

Abstract. In the European region, the magnetic field at satellite altitudes (~ 350 km) is mainly defined by a long-wavelength magnetic-low called here the Central Europe Magnetic Low (CEML), located to the southwest of the Trans European Suture Zone (TESZ). We studied this area by a joint analysis of the magnetic and total gradient (∇T) anomaly maps, for a range of different altitudes of 5 km, 100 km and 350 km. Tests on synthetic models showed the usefulness of the joint analysis at various altitudes to identify reverse dipolar anomalies and to characterize areas in which magnetization is weak. By this way we identified areas where either reversely or normally magnetized sources are locally dominant. At a European scale these anomalies are sparse, with a low degree of coalescence effect. The ∇T map indeed presents generally small values within the CEML area, indicating that the Palaeozoic Platform is weakly magnetized. At 350 km altitude, the TESZ effect is largely dominant: with intense ∇T highs above the East European Craton (EEC) and very small values above the Palaeozoic Platform, this again denoting a weakly magnetized crust. Small coalescence effects are masked by the trend of the TESZ. Although we identified sparsely located reversely magnetized sources in the Palaeozoic Platform of the CEML, the joint analysis does not support a model of a generally reversely magnetized crust. Instead, our analysis strongly favors the hypothesis that the CEML anomaly is mainly caused by a sharp contrast between the magnetic properties of EEC and Palaeozoic Platform.

scholarly journals Discourse Beyond Borders: Periodicals, Dissidents, and European Cultural Spaces

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Carlos Reijnen
Keyword(s):  
Cold War ◽  
Public Sphere ◽  
Eastern Europe ◽  
Central Europe ◽  
Spatial Perspective ◽  
Central European ◽  
East European ◽  
European Public ◽  
Cultural Spaces ◽  
The Cold War

Émigré periodicals in Cold War Europe have long been considered isolated islands of Central and East European communities with limited relevance. In the second half of the Cold War, some of these periodicals functioned as crucial intersections of communication between dissidents, emigrants and Western European intellectuals. These periodicals were the greenhouses for the development of new definitions of Central Europe, Eastern Europe, and Europe at large. This article studies Cold War émigré periodicals from a spatial perspective and argues that they can be analysed as European cultural spaces. In this approach, European cultural spaces are seen as insular components of a European public sphere. The particular settings (spaces) within which the periodicals developed have contributed greatly to the ideas that they expressed. The specific limits and functions of periodicals such as Kultura or Svědectví [Testimony] have triggered perceptions of Central European and European solidarity. The originally Russian periodical Kontinent promoted an eventually less successful East European-Russian solidarity.  

scholarly journals A new specimen of Araucaria fricii from the early Coniacian of the Bohemian Massif, Central Europe

2021 ◽  
Vol 77 (2) ◽  
pp. 282-286
Author(s):  
Jiří Kvaček
Keyword(s):  
Czech Republic ◽  
Central Europe ◽  
Bohemian Massif ◽  
Type Material ◽  
Massif Central ◽  
The Czech Republic ◽  
First Occurrence ◽  
Bohemian Cretaceous Basin ◽  
Cone Scale

A specimen of Araucaria fricii is described from the upper part of the Teplice Formation in the Bohemian Cretaceous Basin. It extends the first occurrence of A. fricii from the mid-Coniacian back to the early Coniacian. Found in the Radovesice locality near Kučlín in the northern part of the Czech Republic, it is characterised by a deltoid cone scale complex with a centrally placed seed. It is compared to the type material of A. fricii from the mid-Coniacian Březno Formation and other European Cretaceous species of Araucaria. The taphonomy and palaeoecology of A. fricii is briefly discussed.

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