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Correlation of tectonic evolution of the Blanice Graben and of late Variscan hydrothermal processes
Hübst, Zdeněk ; Zachariáš, Jiří (advisor) ; Pertold, Zdeněk (referee)
The Blanice graben represents about 200 km long N-S trending tectonic zone with minimal sinistral movement of about 17 km. Large number of hydrothermal ore deposits (eg. the Roudný gold deposit; or numerous small-sized deposits/districts of Ag-Pb-Zn ores - Stará Vožice - Ratibořské Hory or Rudolfov near České Budějovice). This thesis is focused on the northern and central part of the Blanice graben in between the villages Vlašim, Mladá Vožice and Chýnov. Much of the work is focused on the reconstruction of the structural evolution of the Roudný gold deposit. The thesis is aimed in the study of brittle deformation, namely in the study hydrothermal veins, intrusive dikes and in paleostress analysis of fault-slip data. In addition to field data, structural data were also excerpted from unpublished historical documents (reports, maps, underground documentation). At least two phases of brittle deformation were discriminated in the study area. Older phase corresponds to E-W to NW-SE oriented compression. The younger phase represents extension in the E-W to NE-SW direction. During the older phase, the oldest types of quartz veins (Q0 to Q2) formed at the Roudný gold deposit, while type Q3 veins at the same deposit formed during the younger phase. The younger tectonic phase also allowed formation of hydrothermal...
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Correlation of tectonic evolution of the Blanice Graben and of late Variscan hydrothermal processes
Hübst, Zdeněk ; Zachariáš, Jiří (advisor) ; Pertold, Zdeněk (referee)
The Blanice graben represents about 200 km long N-S trending tectonic zone with minimal sinistral movement of about 17 km. Large number of hydrothermal ore deposits (eg. the Roudný gold deposit; or numerous small-sized deposits/districts of Ag-Pb-Zn ores - Stará Vožice - Ratibořské Hory or Rudolfov near České Budějovice). This thesis is focused on the northern and central part of the Blanice graben in between the villages Vlašim, Mladá Vožice and Chýnov. Much of the work is focused on the reconstruction of the structural evolution of the Roudný gold deposit. The thesis is aimed in the study of brittle deformation, namely in the study hydrothermal veins, intrusive dikes and in paleostress analysis of fault-slip data. In addition to field data, structural data were also excerpted from unpublished historical documents (reports, maps, underground documentation). At least two phases of brittle deformation were discriminated in the study area. Older phase corresponds to E-W to NW-SE oriented compression. The younger phase represents extension in the E-W to NE-SW direction. During the older phase, the oldest types of quartz veins (Q0 to Q2) formed at the Roudný gold deposit, while type Q3 veins at the same deposit formed during the younger phase. The younger tectonic phase also allowed formation of hydrothermal...
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