Podrobnosti záznamu

Název
    Geochemistry of Moldanubian amphibolites (Bohemian Massif, Czech Republic)
Údaj o odpovědnosti
    Olga Moravcová
Autor
    Moravcová, Olga, 1968-
Další autor; role
   Suk, Miloš
   Původce
Jazyk
    anglicky
Zdrojový dokument - seriál
    Krystalinikum
Svazek/č.
    Vol. 25
Strany
    p. 83-103
Rok
    1999
Poznámky
    24 obr., 1 tab., 3 s.bibl.
    České resumé
    Zkr. název ser.: Krystalinikum
Předmětová skupina
    amfibolit
    chemismus hornin
    moldanubikum
    petrogeneze
Geografické jméno
    ČR
Klíčové slovo
    Amphibolites
    Bohemian
    Czech
    Geochemistry
    Massif
    Moldanubian
    Republic
Abstrakt (anglicky)
   Presented work brings and summarized results of a comprative study of chemical composition of Moldanubican ampghibolites, based on 373 analyses of major elements and 50 anaylses of trace elements. Amphibolites were compared with other Moldanubian rock types, such as amphibole gneisses, granulites and eclogites, ultrabasic rocks and other metavolcanics, as well as metamorphosed volcanics of the Barrandian Proterozoic, the Islet Zone and the Železné hory Mts. Crystalline Area. Geological maps 1: 50 000 covering the entire Moldanubian Zone were used to show the distribution and spatial relationships between amphibolite occurrences. Variations in chemical composition of the above-mentioned rocks and their characteristics relative to the Moldanubian amphibolites were studied using various diagrams. Special attention has been paid to banded and garnet-bearing amphibolites.
   Based on the geochemistry and geological position, the Moldanubian amphibolites form rather a homogenous group of mainly transitional or tholeiitic basalts with high contents of iron, manganese and titanium and a lower content of potassium. The source magmas probably formed on the ocean floor (T-type MORB) or in the island volcanic arc with a thin oceanic crust. They are similar to the low-K tholeiites of the Bohemian Proterozoic (spilites)
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    14. 1. 2008
Datum importu
    8. 8. 2012