Stan badań mezozoiku NW i N obrzeżenia Gór Świętokrzyskich

Henryk Jurkiewicz

Abstract


THE PRESENT STATE OF GEOLOGICAL STUDIES ON THE MESOZOIC OF NW AND N MARGINS OF THE HOLY CROSS MTS

Summary
The paper presents the history of studies on Mesozoic strata of the northern and north-western margins of the Holy Cross Mts, carried out with the use of seismic and drilling methods. The thickness differentiation of particular links of the Triassic, Jurassic and Cretaceous (see Tables) and directions of changes in thickness (see structural map of the base of the Triassic) are discussed. The maximum thickness of the Mesozoic was found in the Studzianna - Mniszków - Tomaszów Mazowiecki zone, despite of the lack of the Cretaceous and a part of Jurassic strata (e.g. borehole Studzianna IG-2). This is evidenced by borehole and seismic data; the Mesozoic cover appears to be 3142,0 m thick in Studzianna IG-2 borehole (without Cretaceous and Upper Jurassic), about 3600 m thick at Mniszków (without Cretaceous) and about 4100 m at Tamaszów Mazowiecki The direction of the maximum thickness of the Mesozoic is somewhat oblique to the axis of the Kuiavian-Pameranian Swell and parallel to that of the Tomaszów Basin. The final of the paper deals with structural elements recorded by drilling and seismic. The most important of these elements include Ostałów, Studzianna - Nieświn - Opoczno, Radoszyce, Skarżysko-Kamienna, Krasna and Radwanów anticlines. The whole area in question is cut by several dislocations (see Fig. 2) NW -SE oriented and others, parallel to them, which results in translocation of blocks in relation to one another. Amplitude of translocations is markedly differentiated, ranging from 100 m to 300 m or even, sometimes, more; higher values of vertical and horizontal translocations are found along transversal dislocations.

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