Recent relative movements in the tectonic zone of the Sudety Mts.

Abstract

Recent geodynamic activity of the Sudeten in the area of Poland and the Czech Republic has been confirmed by the results of geodynamic, seismic, geodetic and other tests. This is especially the case for the periodical (the last 25 years) satellite GPS/GNSS and gravimetric measurements in the regional research network GEOSUD, SILESIA, SUDETY and the local geodynamic polygons ("Snieznik", "Stolowe Mts."), as well as observation of crack-gauges on several tectonic faults. Vertical movements are indicated in the maps of recent movements of the Earth's crust. Two adjacent countries in the area of the Sudeten achieved results from +0.5 mm/year to-2 mm/year with reference to the tide gauge on the coast of the Baltic Sea. They present absolute value received on the basis of a comparison of the results of repeated (in intervals of 20-30 years) measurements of 1 st order levelling lines. The characteristics of this data do not allow for an assessment of recent tectonic activity in the Sudety Mts. because the isolines of absolute velocities of vertical movements of the Earth's crust surface on the maps (Wyrzykowski, 1985; Kowalczyk, 2006; Vyskočil, 2002) present "smoothed" large-area changes without a proof of dynamic changes in the Sudeten tectonic zones. This paper presents results of analysis archival data on repeated measurement precise levelling networks. The results of analysis were used to produce maps of vertical movements of the Earth's crust surface. Analysis is focused on the part of levelling lines which intersect Sudeten main tectonic faults. This paper included methodology of data processing. In research period relative vertical movements of tectonic zones are referencing to the relative stable benchmark. The values of these velocities between-0.8 ÷ +0.8 mm/year confirm recent geodynamic mobility in this Central European area.

Investigation on Reflection of Tectonic Pattern in ASG EUPOS Data in the Sudetes and Adjacent Areas

“…Relations between orientation of total displacement vectors with the Sudetes correspond to the result of height measurements discussed by Kaczmarek et al (2016). The authors depicting areas of uplifts and subsidence.…”

“…Recent geodynamic activity of the Sudeten and adjacent areas confirmed by the results of geodetic, geophysical and other test works in some areas. The maximal vertical changes were found in areas nearby following locations (Kaczmarek et al, 2016): Svitavy (subsidence -0.6 mm/y), Trutnov and Kłodzko (uplift +0.8 mm/y), Jelenia Góra (subsidence -0.8 mm/y). This very important results should be analyzed in the scope of relation to geological location.…”

“…The effect of long-time tectonic deformation is a system of horsts and grabens, system of faults including large regional faults. Such a geological scheme with pattern of tectonic lines involves a stress field pattern as its expressions in detected displacements (Wojewoda, 2007;Kaczmarek et al, 2016). A role of tectonic lines in mining tremors in Polish cooper mines in Fore-Sudetic Monocline is widely discussed in the paper by Orlecka-Sikora et al (2009).…”

“…The presented study deals with deformation field in the Sudetes and adjacent areas, which became a test area of many teams of researchers representing a range of disciplines. Since tectonic activity of the Sudetes is a subject of widespread interest, the keystone is to build research networks, to make international connections and international projects and finally data exchange and multidisciplinary data elaboration (see: Cacoń et al, 2004;Kaczmarek et al, 2016). The presented study concentrates on displacements in the Sudetes and adjacent areas, especially in Fore-Sudetic Block exploring GNSS data evaluated from observations carried out in ASG-EUPOS permanent stations.…”

Geodesy and Cartography

“…and in adjacent areas are determined by expressions of underlying geological structures. Kaczmarek et al (2016) summarized the epoch satellite GPS/GNSS and gravimetric measurements from last 25 years in the regional research network GEO-SUD, SILESIA, SUDETY and the local geodynamic polygons ("Snieznik", "Stolowe Mts."). The data from crack-gauges on several tectonic faults were also included.…”