Record details

Title
    Šejby and Nakolice stocks - examples of the phosphorus-rich mineralized granites (a review)
Statement of responsibility
    Radek Heřmánek, Dobroslav Matějka, Milan Klečka, František Čekal
Other titles
    Proceedings of the International Conference "Genetic Significance of Phosphorus in Fractionated Granites" (IGCP Project No.373) (Variant.)
Author
    Čekal, František
    Heřmánek, Radek
    Klečka, Milan
    Matějka, Dobroslav
Language
    anglicky
Source title - serial
    Acta Universitatis Carolinae, Geologica
Vol./nr.
    Vol. 42, no. 1
Pages
    p. 46-49
Year
    1998
Notes
    1 obr., 1 tab., 18 bibl.
    Zkr. název ser.: Acta Univ. Carol., Geol.
Subject group
    chemismus hornin
    fosfor
    granit
    krystalizace frakcionovaná
    minerály
    moldanubický pluton
Geographical name
    ČR-Čechy
    Nakolice (České Budějovice)
    Šejby (České Budějovice)
Keyword
    Examples
    Granites
    Mineralized
    Nakolice
    Phosphorus-rich
    Review
    Stocks
    Šejby
Abstract (in english)
   Highly differentiated muscovite leucogranites of Moldanubian Batholith (from the Nové Hrady area) have been studied. Rocks of Nakolice and Šejby stocks are of magmatic origin representing the last stage of magmatic evolution of the Eisgarn granite. During its magma evolution, fractional crystallization of biotite, plagioclase and accessory minerals took the main part. The main rock type of the both bodies is a medium-grained (to coarse-grained) albite-muscovite granite. Accessory minerals are represented by biotite, apatite, rare zircon, ilmenite cassiterite topaz Nb-Ta oxides garnet. All rock types have similar geochemical features: high contents of SiO2, Al2O3, P2O5 and Na2O generally prevailing over K2O, low contents of CaO and MgO. Trace-element chemistry is characterised by high contents of Cs, Nb, Sn, Ta and Li; on the contrary these rocks are low in Sr, Ba, Zr as well as in REE. Flat chondrite-normalised REE patterns exhibit strong negative Eu anomalies.
   The Nakolice granite shows higher degree of fractionation than the rocks from Šejby
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    21. 3. 2008
Import date
    8. 8. 2012