Naslov
Geodetic Contribution to the Determination of Recent Tectonic Activities at the Area of Croatia

Autori
Cigrovski-Detelić, Brankica

Izvornik
Allgemeine Vermessungs-Nachrichten (0002-5968) 110 (2003), 8-9; 288-298

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
GPS; Surface Deformation; Tectonic Activities

Sažetak
ABSTRACT The paper presents a method for determining the model of the Earth's external surface deformation on the basis of geodetic GPS-measurements, and the comparison of obtained results with geotectonic information for the observed area in accordance with the movement theory of lithosphere plates. The geodetic model has been produced referring to the difference of adjusted ellipsoid coordinates of mutual points in two GPS campaignes: CRODYN 94 and CRODYN 96. The results of surface deformation analysis obtained in the tested area placed between 42.4 and 46.4 degree of northern latitude and between 13.6 and 17.6 of eastern longitude indicate the zones of various deformations. There have been two zones of extensions and two zones of compressions detected, and between these zones there have been no zones with larger deformation detected. The zone with maximum extension value 6 mm for the distance of 10 km in period of one year has been detected in the north-west part of the observed area, and the other zone with somewhat smaller extension values 3-5 mm / 10 km is placed westward from Split. The values of length compressions are a bit smaller than the extensions and run from 3-5 mm at the distance of 10 km in both above stated zones. All these results confirm completely the geological notions about the tectonic movements and the existence of these zones at the tested area. Compression zones can be recognized on the basis of reverse faults and extensive tectonic activity, i.e. the epicentres of the strongest earthquakes are placed in this areas, and these zones are pretty identical with the compression zones in the geodetic model. Although the GPS-measurements have been observed only in the period of two years, the obtained results confirm undoubtedly the correlation between geodetic and geological models in determining the movements and deformations of the external part of the Earth's crust.

Izvorni jezik
Engleski

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