Record details

Title
    Radioactivity of the highly fractionated Homolka granite in the Moldanubian pluton, southern Bohemia
Statement of responsibility
    Karel Breiter, Ivan Gnojek
Author
    Breiter, Karel, 1956-
    Gnojek, Ivan
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 71, no. 2
Pages
    p. 173-176
Year
    1996
Notes
    4 obr., 14 bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    analýza hornin
    chemické vlastnosti
    granit
    K (draslík - 19)
    koncentrace
    magnetická susceptibilita
    moldanubický pluton
    radioaktivní vlastnosti hornin
    Th (thorium - 90)
    U (uran - 92)
Subject category
    centrální masiv
    typ Homolka
Geographical name
    ČR-Čechy
Keyword
    Bohemia
    Fractionated
    Granite
    Highly
    Homolka
    Moldanubian
    Pluton
    Radioactivity
    Southern
Abstract (in english)
   The stock-shaped granite of Homolka, which occurs in the central part of the Moldanubian (South Bohemian) pluton in the district of Jindřichův Hradec, is a product of late and expressive magmatic differentiation. The medium-grained to coarse-grained albite-muscovite-topaz granite is rich in phosphorus, fluorine, lithium, rubudium, cesium, tin, niobium and tantalum. The ground gamma-ray spectrometry survey revealed the significant enrichment of uranium, from 8 to 20 ppm, accompagnied by a considerable decrease of thorium, the concentration of which is often less than 1 but never exceeding 3 ppm Th. Also the derived ratio-parameters such as U/Th, Th/K and U/K distinctly define the stock. The magnetic susceptibility of this granite is very low
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    26. 2. 2008
Import date
    8. 8. 2012