Podrobnosti záznamu

    Die genetische und geotektonische Klassifikation der Goldvererzungen in der Böhmischen Masse
Údaj o odpovědnosti
    Petr Morávek, Gerhard Lehrberger
Další názvy
    Gold in Bayern - Vorkommen am Westrand der Böhmischen Masse (Variant.)
    Lehrberger, Gerhard
    Morávek, Petr
Zdrojový dokument - seriál
    Geologica bavarica
    Jg. 102
    2 obr., 2 tab., 3 s.bibl.
    Anglické resumé
    Zkr. název ser.: Geologica bavar.
Předmětová skupina
    Český masiv
    provincie metalogenetická
    rudy Au
Geografické jméno
    Česká republika
    Polsko - jihozápad
Klíčové slovo
Abstrakt (anglicky)
   Within the Variscan orogen in central and western Europe an accumulation of gold mineralisation occurs, which show certain metallogenetic similarities. This article gives a genetic and geotectonic classification of the gold deposits of the Bohemian Massif to obtain the metallogenetic link to other central and western European Variscan areas. A common feature of the gold mineralisation of the Bohemian Massif seems to be the heritage of gold from upper Proterozoic and/or lower Paleozoic volcanosedimentary rocks to variscan structurally controlled deposits. The processes of mobilisation and redeposition of the metals were driven by metamorphic processes and/or granitoid intrusions. The primary metal content of the rocks is regarded to be related to an upper Proterozoic and/or lower Paleozoic volcanic activity with associated hydrothermal-exhalative activity.
   During the continental consolidation of the Bohemian Massif in the early Variscan orogeny gold and other metals were concentrated in lithological and tectonical favourable structures. This type of deposits is characterised by high gold fineness and Au-As-Bi-Mo-Te-W-association. The fluids responsible for the metal transport originated most probably from metamorphic dehydration processes, the deposits therefore can be regarded to be of metamorphic-hydrothermal and/or metamorphic plutonic origin. During the middle to late Variscan orogenic period hydrothermal vein-type Au/Ag-base metal and Au-Sb-deposits formed related to deep seated regional tectonic zones. A rare type of gold mineralisation is represented by the deposits of the plutonic-porphyry type and by skarn related deposits.
   The occurrence of different genetic types of gold mineralisation is restricted to certain tectono-structural units and implies a connection between structural development of parts of the Bohemian Massif and the formation of gold mineralisations. The formation of placer gold deposits is related to the post-Variscan platform-type evolution of the Bohemian Massif. Mainly Permian-Carboniferous molasse-type sediments and Tertiary to Quaternary allvuial and fluvioglacial sediments show significant gold concentrations in numerous sites throughout the Bohemian Massif
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
Datum vložení
    21. 1. 2008
Datum importu
    8. 8. 2012