Podrobnosti záznamu

    Structural evolution of the Roudny gold deposit, Bohemian Massif: a combination of paleostress analysis and review of historical documents
    Hübst, Zdeněk
    Zachariáš, Jiří
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Journal of Geosciences
    Roč. 57, č. 2
Výraz tezauru
    Blanice Graben
    hydrothermal ore deposits
    Moldanubian Zone
    paleostress analysis
    strike-slip fault
Klíčové slovo
Abstrakt (anglicky)
   The Roudny gold deposit, hosted by a large-scale NNE-SSW trending fault zone (the Blanice Graben), represents a type locality of low-fineness gold (Au-Ag) mineralization in the Bohemian Massif. In order to decipher its structural evolution, we performed a detailed analysis of brittle to brittle-ductile structures on outcrops and of structures described in unpublished historical materials. Three stress phases were distinguished: compressional, strike-slip, and extensional. Most hydrothermal veins originated during the strike-slip and extensional phases. Based on a comparison with the nearby Ratiborske Hory-Stara Vozice deposit, a representative of Ag-Pb-Zn vein type mineralization in the Blanice Graben, we conclude that the structural pattern of both ore deposits/mineralizations (Ag-Pb-Zn and Au-Ag) is compatible with the overall sinistral strike-slip evolution of the Blanice Graben (c. 280-270 Ma). Whereas most of the Ag-Pb-Zn veins represent typical extension veins/fractures, early go
   ld-bearing quartz veins of the Roudny deposit were probably initiated as Riedel R' shears and were later reopened during the extensional phase.
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
Datum importu
    27. 4. 2014