Podrobnosti záznamu

Název
    Gallium and germanium geochemistry during magmatic fractionation and post-magmatic alteration in different types of granitoids: A case study from the Bohemian Massif (Czech Republic)
Autor
    Breiter, Karel
    Gardenová, N.
    Kanický, V.
    Vaculovič, T.
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Geologica Carpathica
Svazek/č.
    Roč. 64, č. 3
Strany
    s. 171-180
Rok
    2013
Poznámky
    Projekt: GAP210/10/1309, GA ČR3cav_un_auth*0263316
    Rozsah: 10 s. : E
Předmětová kategorie
    gallium
    geochemistry
    germanium
    granites
    ICP-MS
Klíčové slovo
    Alteration
    Bohemian
    Case
    Czech
    Different
    During
    Fractionation
    Gallium
    Geochemistry
    Germanium
    Granitoids
    Magmatic
    Massif
    Post-magmatic
    Republic
    Study
    Types
Abstrakt (anglicky)
   Contents of Ga and Ge in granites, rhyolites, orthogneisses and greisens of different geochemical types from the Bohemian Massif were studied using inductively coupled plasma mass spectrometry analysis of typical whole-rock samples. The contents of both elements generally increase during fractionation of granitic melts: Ga from 16 to 77 ppm and Ge from 1 to 5 ppm. The differences in Ge and Ga contents between strongly peraluminous (S-type) and slightly peraluminous (A-type) granites were negligible. The elemental ratios of Si/1000Ge and Al/1000Ga significantly decreased during magmatic fraction: from ca. 320 to 62 and from 4.6 to 1.2, respectively. During greisenization, Ge is enriched and hosted in newly formed hydrothermal topaz, while Ga is dispersed into fluid. The graph Al/Ga vs. Y/Ho seems to be useful tool for geochemical interpretation of highly evolved granitoids.
Přispěvatel
    AV ČR Brno, Geologický ústav
Kód přispěvatele
    AV ČR, GLÚ
Zdrojový formát
    U
Datum importu
    23. 10. 2014