Publication details

Tektonická analýza okrajového zlomu blanenského prolomu

Title in English Tectonic analysis of marginal fault of Blansko trough


Year of publication 2017
Type Article in Periodical
Magazine / Source Geologické výzkumy na Moravě a ve Slezsku
MU Faculty or unit

Faculty of Science

Keywords fault; thrust fault; Blansko trough; tectonics; kinematics
Description Sand quarry under study is situated in the western surroundings of Dolní Lhota village north of Blansko town. The quarry uncovers interested tectonic contact of Blansko Trough and the Brno Massif, which may be damaged during some time. So, this work may be one of last possibilities to study the fault core. Blansko Trough is fulfilled by Cretaceous sedimentary rocks with almost subhorizontal bedding. The trough is limited by reverse marginal fault with granodiorite of the Brno Massif. Cretaceous sediments near the fault have overturned bedding steeply inclined to the southwest, which is caused by the bending and dragging along the fault striking in NW–SE direction with inclination to the SW. In addition, there was found bedding of Cretaceous sediments steeply dipping to SSE at that point. Magnetic lineation K1 detected by analysis of anisotropy of magnetic susceptibility (AMS) in the deformed clays was subhorizontal trending in SW–NE. K2 is inclined to the east and poles of the magnetic foliation (K3) are showing that the magnetic foliation is moderately dipping mainly to SSE, which corresponds with bedding measured at that point. It can be concluded that bedding at that point and outputs of AMS were affected by some minor transversal fault, along which deformations led to the anomaly oriented structures.

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