Record details

Title
    Structural evolution of the Roudny gold deposit, Bohemian Massif: a combination of paleostress analysis and review of historical documents
Author
    Hübst, Zdeněk
    Zachariáš, Jiří
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Journal of Geosciences
Vol./nr.
    Roč. 57, č. 2
Pages
    17
Year
    2012
Thesaurus term
    Blanice Graben
    gold
    hydrothermal ore deposits
    Moldanubian Zone
    paleostress analysis
    strike-slip fault
Keyword
    Analysis
    Bohemian
    Combination
    Deposit
    Documents
    Evolution
    Gold
    Historical
    Massif
    Paleostress
    Review
    Roudny
    Structural
Abstract (in english)
   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we performed a detailed analysis of brittle to brittle-ductile structures on outcrops and of structures described in unpublished historical materials.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.
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    27. 4. 2014