JS4 Deformation of the Lithosphere: Integrating Seismology and Geodesy through Modelling (IASPEI, IAG)

Joint Inter-Association Symposium



01-Jul-2015, 15:00 - 16:30


 
Abstract content:

Model of the horizontal deformation of the earth's crust surface of the Sudeten (SW Poland) based on GPS data

Monitoring data from permanent GNSS stations located in the study area and archival periodical GPS measurements made in period 1997 - 2012, were employed in the project. All the monitoring data were reprocessed with the latest version of the Bern software in a standardized frame of reference, applying new, absolute models of antenna phase centers and latest models of parameters of the rotary motion of the Earth, as well as models of the atmosphere. An new approach to the estimation of displacement velocities of the sites of the research networks was introduced, consisting in an integration of measurements from permanent GNSS stations with those from periodic measurement sites. Standardized and corrected results of the aggregated and integrated GPS network processing were used for a preliminary geodynamic interpretation. This concerned primarily the stage of identification of the model of surface deformations in the study area based on calculated velocity vectors. Certain modifications of well-known methods of creating surface models (GRID-based interpolation) of intraplate velocities vector fields referring to motions of the outermost layer of the Earth's crust and of horizontal deformation models of the Earth’s surface (linear deformations), were applied. Thus generated models were subjected to geodetic (geometrical) and structural geological interpretation. The latter interpretation was performed together with geologists, geophysicists and seismologists. The outcomes of this interpretation can be considered as the basis for a due recognition of the actual nature of a tectonic behavior of the area of the Sudeten mountains and the Fore Sudetic block at their northern margin, as well as for verification of results of the hitherto made geodetic and geological studies.

 
Author(s):
B. Kontny1, P. Grzempowski2, P. Aleksandrowski3, J. Kaplon1, V. Schenk4, Z. Schenkova4.
1Wroclaw University of Environmental and Life Sciences, Institute of Geodesy and Geoinformatics, Wroclaw, Poland.
2Wroclaw University of Technology, Institute of Mining- Faculty of Geoengineering- Mining and Geology, Wroclaw, Poland.
3Polish Geological Institute - National Research Institute, Lower Silesia Branch in Wroclaw, Wroclaw, Poland.
4Academy of Sciences of the Czech Republic, Institute of Rock Structure and Mechanics, Prague, Czech Republic.

 

Keywords:
GNSS     intraplate velocities     Sudeten     horizontal deformation models     geological interpretation