scholarly journals Geochemistry of Granitic Rocks of the Moldanubian Batholith (Central European Variscides)

2020 ◽  
Author(s):  
Miloš René
Keyword(s):  
Granitic Rocks ◽  
Central European ◽  
European Variscides

scholarly journals Alteration of Granitoids and Uranium Mineralization in the Blatná Suite of the Central Bohemian Plutonic Complex, Czech Republic

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 821
Author(s):  
Miloš René
Keyword(s):  
Czech Republic ◽  
Low Temperature ◽  
Shear Zones ◽  
Uranium Mineralization ◽  
Granitic Rocks ◽  
Uranium Deposits ◽  
Magmatic Complex ◽  
Central European ◽  
Plutonic Complex ◽  
European Variscides

The Bohemian magmatic complex belongs to granitoid plutons of the Central European Variscides. Hydrothermal uranium mineralization evolved in the small uranium deposits Nahošín and Mečichov is associated with N–S shear zones occurring on the SW margin of the Central Bohemian plutonic complex formed by amphibole-bearing biotite granodiorites of the Blatná suite. The purpose of presented study is description of uranium mineralization bounded on brittle shear zones, which is coupled with intense low-temperature hydrothermal alteration of granitic rocks. Uranium mineralization, formed predominantly of coffinite, rare uraninite, and thorite, is accompanied by intense hematitization, albitization, chloritization, and carbonatization of original granitic rocks that could be described as aceites. These alterations are accompanied by the enrichment in U, Ti, Mg, Ca, Na, K, Y, and Zr and depletion in Si, Ba, and Sr. The analyzed coffinite is enriched in Y (up to 3.1 wt % Y2O3). Uraninite is enriched in Th (up to 9.8 wt % ThO2) and thorite is enriched in Zr (up to 5.7 wt % ZrO2). The REE-elements are concentrated in the REE-fluorcarbonate synchysite-(Ce).

The earliest ostracods from the Ordovician of the Prague Basin, Czech Republic

2014 ◽  
Vol 64 (4) ◽  
pp. 367-392 ◽  
Author(s):  
Karolína Lajblová ◽  
Petr Kraft
Keyword(s):  
Czech Republic ◽  
Bohemian Massif ◽  
Massif Central ◽  
Central European ◽  
Middle Ordovician ◽  
Prague Basin ◽  
Barrandian Area ◽  
Fossil Assemblages ◽  
European Variscides

Abstract The earliest ostracods from the Bohemian Massif (Central European Variscides) have been recorded from the Middle Ordovician of the Prague Basin (Barrandian area), in the upper Klabava Formation, and became an abundant component of fossil assemblages in the overlying Šarka Formation. Both early ostracod associations consist of eight species in total, representing mainly eridostracans, palaeocopids, and binodicopids. The revision, description, or redescription of all species and their distribution in the basin is provided. Their diversification patterns and palaeogeographical relationships to ostracod assemblages from other regions are discussed.

SUPERIMPOSED STRUCTURES DURING PROLONGED PLATE CONVERGENCE – EXAMPLES FROM THE CENTRAL EUROPEAN VARISCIDES

2019 ◽  
Author(s):  
Uwe Kroner ◽  
◽  
Peter Hallas ◽  
Tobias Stephan ◽  
Rolf L. Romer
Keyword(s):  
Central European ◽  
Plate Convergence ◽  
European Variscides

Evolution of the central European Variscides

GFF ◽  
1996 ◽  
Vol 118 (sup004) ◽  
pp. 31-32
Author(s):  
W. Franke
Keyword(s):  
Central European ◽  
European Variscides

New evidence for an old idea: Geochronological constraints for a paired metamorphic belt in the central European Variscides

Lithos ◽  
2018 ◽  
Vol 302-303 ◽  
pp. 278-297 ◽  
Author(s):  
T.M. Will ◽  
E. Schmädicke ◽  
X.-X. Ling ◽  
X.-H. Li ◽  
Q.-L. Li
Keyword(s):  
Metamorphic Belt ◽  
Central European ◽  
Geochronological Constraints ◽  
New Evidence ◽  
European Variscides

scholarly journals Cambrian Zawidów granodiorites in the Cadomian Lusatian Massif (Central European Variscides): what do the SHRIMP zircon ages mean?

2014 ◽  
pp. 313-326 ◽  
Author(s):  
D. Białek ◽  
R. Kryza ◽  
T. Oberc-Dziedzic ◽  
C. Pin
Keyword(s):  
Massif Central ◽  
Central European ◽  
Shrimp Zircon ◽  
European Variscides
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