Acta Musei Moraviae

The Stříbrné Hory conglomerates in the Moldanubicum (Early Permian, Czech Republic) – overview

The aim of the paper is to give an overview of the research focused on the conglomerates from the Moldanubicum in the area of the Stříbrné Hory village (Czech Republic). The conglomerates were discovered in 1938 in former small quarry and in 1950s they were also found in the Peklo medieval mine close to the Stříbrné Hory village. These rocks contain unsorted pebbles mostly of Moldanubian paragneisses, migmatites, granites, microgranites, lamprophyres and quartz from the surroundings rock units. The original greywacke matrix consisting of aleuropelitic material and dacite ash was hydrothermally alterated – chloritization and baueritization of biotite or sericitization of feldspar. Originally alluvial fan was formed in parallel with volcanism from a remote source at the rim of the Jihlava Graben in the Early Permian. The postorogenic hydrothermal alteration of the Stříbrné Hory conglomerates was associated with a transten sion event ~270 Ma. The paper was written on request and in memory of † Stanislav Houzar and † Jaroslav Havlíček.