The large Variscan strike-slip fault between Kozicfn and Ritka villages, Barrandian, Bohemian Massif

摘要

The Clay and the Zavist faults were described as two different structures. Both these faults are steeply dipping and striking in SW-NE direction. As both faults have reverse dip--slip component but opposite dip direction, it seemed evident that they are really two different faults. The Clay fault was recognized in mines of the Pribram and Bohutin ore districts and named by ancient miners. The dip varies from 70° to NW in the SW part at the Kozicfn surroundings to nearly vertical in the NE part at the Picin area (Havhcek, 1973). Havlfcek (1981) classified this structure as an overturned synsedimentary normal fault. He deduced the Cambrian age of the fault base on his geological map, where the Lower Paleozoic basalt dike cross-cuts the fault surface. The SW end of the fault is marked by the downthrown SE block with the Lower Paleozoic sediments ("Rozmital Islet"), which is rimmed by the tonalitic intrusion (Blatna type).