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Some results obtained from three dimensional plate kinematics analysis in Romania - (1997-2000)

100%

Ghiţău D.

2004

tom nr 4/71

91--103

Within CERGOP-2/ENVIRONMENT project, a special attention is given to geodynamics models development for specific regions from countries that participate to the present project. For this goal, study groups were created (WPs-l0.x) which has the main objectives to monitor recent crust movements, to detect the borders of the tectonic plates and to quantify their three dimensional movement rates. These studies require a close cooperation between geodesists, geologists and geophysicists. In 1996 the Collaborative Research Center (CRC) 461 "Strong Earthquakes: A Challenge for Geosciences and Civil Engineering" was founded by the Deutsche Forschungsgemeinschaft (German Research Foundation) as a German contribution to the UN initiative "International Decade of Disaster Reduction" (IDNDR). A central project, of this CRC, is the subproject BI "Three Dimensional Plate Kinematics in Romania", which studies the deformation determination ofgeotectonic units in the Vrancea Region (epicenter zone of earthquakes from Romania). In this purpose, there were accomplished by repeated GPS-measurements within a network which has been installed in 1997 - Fig. 4 (Ghitau, 1997, Dinter & Schmitt, 1999, et al.) and measured in 1997, 1998, 2000, 2002 and 2003. This network was formed, at the beginning, by 26 stations, covering an area of 250 km x 380 km having the Vrancea area as the centre. At present, the studied region is enlarged to southern part of Romania and contains much more points. The geodetic DATUM is given by stations of the CEGRN the CEI-initiative CERGOP.

National progress report of Romania for CERGOP

38%

Ghiţău D. , Gavrilescu M. , Nacu V. , Dumitrașcu D. , Năstase F. , Mateiciuc D.

2004

tom nr 4/71

87--90

Three dimensional deformation analysis with respect to Plate Kinematic in Romania

38%

Dinter G. , Nutto M. , Schmitt G. , Schmidt U. , Ghiţău D. , Marcu C.

tom z. 2/57

29-41

After four years of work within the framework of the Collaborative Research Center (CRC)461 "Strong Earthquakes: A Challenge for Geosciences and Civil Engineering", funded by the Deutsche Forschungsgemeinschaft (German Research Foundation), this paper presents some results from the geodetic subproject B1 called "Threedimensional Platekinematics in Romania". This project was installed to detect borders of the geotectonic plates in Romania, to quantify the moving rates and to determine the deformations of each geotectonic unit. These aims will be accomplished by reapeated GPS-measurements in a network which has been installed in 1997 and expanded in 1999. The present network consists of 35 stations covering an area of 300 x 380 km with theVrancea region in its centre. The geodetic frame is given by six stations of the CEGRN (Central European GPS Geodynamic Refererence Network) of the CEI-Initiative CERGOP and the new ITRF permanent station in Bukarest. Three GPS campaigns were carried out in summer 1997, 1998 and 2000. The main focus of this paper is to present the achieved results and accuracies of the GPS-campaigns, to expose strategies for different ways of deformation analyses with their pros and contras and to give first impressions of deformations in the Vrancea region.