nappes

The model of the geologic evolution of the Carpathians both in terms of the terrane analysis and in the light of the new data of the geologic mapping are represented.

The tectonic units of the Carpathians are considered in terms of the terrane analysis. The Flysch Carpathian nappes and Samdir molasse unit are regarded as the ancient accretionary prism. Growing the prism was caused by the Alpine subduction of the Carpathian Flysch basin basement beneath both the ALCAPA and Tisza-Dacia terranes. At the Cretaceous-Paleogene time the Fore-Marmarosh flysch prism was formed in the front of TiszaDacia terrane and the Pieniny Klippen Belt – Monastyrets–Magura – Duclya wedge was builded in the forland of ALCAPA one.

Crystalline rocks of the Marmarosh massif of the Eastern Carpathians, taking into account based on the plate tectonics theory analysis of their characteristics and tectonic setting and the constructed cross-section of the local gravity anomalies, have been formed by the metamorphic rocks of Ryphean, Vendian, Cambrian and late Paleozoic as well as by the Meso-Cainozoic rocks in the south-eastern passive margin of the European plate.

The tectonic units of the Carpathians are considered in terms of the terrain analysis. Carpathathian orogen is build up of three main elements: microcontinental terrains, sutures and flysch-molasse accretionary prism. There are two main terrains: a northern ALCAPA and a southern Tisza-Dacia. Sutures (Fore-Marmarosh suture, Pieniny Klippen Belt and others), marking the ancient oceanic basins, bound these terrains. The Flysch Carpathians are regarded as the Cretaceous-Neogene accretionary prism.

Purpose. The aim of the work is to conduct the complex analysis of seismicity, geology, seismotectonics and difference scale geodynamic processes in the Tereblya-Rika hydro power station (HPS) area in the Ukrainian Transcarpathians (23.35-23.87ºS, 48.23-48.51ºN) to refine estimation of geo-ecological risks. Methods.