Geological Conditions
The basic geological structure can be characterized as the composite folded-over thrust structure. The footwall consists of several varieties of granites, often especially very tectonically disturbed on the contact with the deposit. The talc – carbonate body itself occurs in the direct top wall of granite.
In the top wall of the deposit, three basic sets of rocks can be distinguished with variable thickness, namely, from the contact with deposit up to the surface:
The deposit is disturbed by tectonic defects of various sizes. The rocks in the top wall are disturbed mostly, but also the floor wall granites [ 13,16, 18, 19 ]. From tectonic zones, the faults of NE-SW, NW-SE, but also E-W and N-S directions are significant. The magnesite is compact enough without significant zones of crushing.
The more apparent disturbance is in positions of talc. In some cases, the talc is strongly broken down to small fractions, in a few isolated cases it is mylonitised. It is caused also by its physical-mechanical attributes. Some positions of the talc become transferred to shale with variable slope.
The depository body consists prevailingly of steatite-changed magnesite. It emerges in the tectonic position between the top wall complex of strata of laminated phyllites and the floor wall granite. It is deposited below the surface, while it declines deeper in the east-west depository centerline direction. In the area of Dlhá dolina (the bore V-DD-26), it occurs in the depth of 213.9 m, but in the easternmost bore V-Ho-2 near the Henclová village, it is already in the depth of 552 m.
