Północno-zachodni zasięg masywu małopolskiego i pozycja tektoniczna wyniesienia Włoszczowej
Abstract
ON NORTH-WESTERN EXTENT OF THE MAŁOPOLSKA MASSIF AND TECTONIC POSITION OF THE WŁOSZCZOWA ELEVATION
Summary
The Małopolska Massif, situated in south-eastern Poland (Fig. 1 ), originated in the course of orogenic movements from the end of Precambrian and Cambrian (5, 7, 8, 9, 13, 14, 17, 18, 19). In the Early Paleozoic it acted as an elevated element, mainly affected by uplifting movements and characterized by nowadays locally preserved thin packets of shallow-water Ordovician and Silurian rocks, separated by a Taconian gap (4). Upper Paleozoic rocks forming cover of the massif are also shallow water in character (Fig. 3).
The Włoszczowa Elevation, recognized in basement of NW part of the Miechów Basin (3, 11) in the course of structural analysis (Fig. 2), is characterized by Precambrian and Paleozoic stages in its evolution the same as in the case of the Małopolska Massif (16, 12, and Fig. 4 here). This indicates common origin and history of the two units and that the former may be treated as a part of the latter. When this is the case, the boundary of the Małopolska Massif should not be dra w along the Szczekociny - Jędrzejów - Chmielnik - Staszów - Nisko line as hitherto assumed (5) but rather the Przedbórz - Chmielnik - Nisko line.
Structural analysis of Cambrian folds exposed in core part of the Chęciny anticline between Chęciny and Miedzianka (16) shows that exas of pre-Devonian folds run parallel to margin of the Włoszczowa Massif. This shows that the massif, similarly as the Małopolska one, was influencing course of folds as early as the Świętokrzyska phase, i.e. that it was already acting as a markedly consolidated structure in these times. In the course of subsequent tectonic movements, in the Paleozoic and Mesozoic times, the influence of this massif has been repeatedly marked, being reflected by changes in directions of fold axes and dislocations in south-western part of the Holy Cross Mts (Fig. 5).
Summary
The Małopolska Massif, situated in south-eastern Poland (Fig. 1 ), originated in the course of orogenic movements from the end of Precambrian and Cambrian (5, 7, 8, 9, 13, 14, 17, 18, 19). In the Early Paleozoic it acted as an elevated element, mainly affected by uplifting movements and characterized by nowadays locally preserved thin packets of shallow-water Ordovician and Silurian rocks, separated by a Taconian gap (4). Upper Paleozoic rocks forming cover of the massif are also shallow water in character (Fig. 3).
The Włoszczowa Elevation, recognized in basement of NW part of the Miechów Basin (3, 11) in the course of structural analysis (Fig. 2), is characterized by Precambrian and Paleozoic stages in its evolution the same as in the case of the Małopolska Massif (16, 12, and Fig. 4 here). This indicates common origin and history of the two units and that the former may be treated as a part of the latter. When this is the case, the boundary of the Małopolska Massif should not be dra w along the Szczekociny - Jędrzejów - Chmielnik - Staszów - Nisko line as hitherto assumed (5) but rather the Przedbórz - Chmielnik - Nisko line.
Structural analysis of Cambrian folds exposed in core part of the Chęciny anticline between Chęciny and Miedzianka (16) shows that exas of pre-Devonian folds run parallel to margin of the Włoszczowa Massif. This shows that the massif, similarly as the Małopolska one, was influencing course of folds as early as the Świętokrzyska phase, i.e. that it was already acting as a markedly consolidated structure in these times. In the course of subsequent tectonic movements, in the Paleozoic and Mesozoic times, the influence of this massif has been repeatedly marked, being reflected by changes in directions of fold axes and dislocations in south-western part of the Holy Cross Mts (Fig. 5).