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SEISMO-TECTONIC ANALYSIS OF THE MAIN FAULTS FROM APUSENI MOUNTAINS

Mihail Diaconescu

Abstract

The Apuseni Mountains are located in the western part of Romania and are limited to the west by the contact with Pannonian Depression and to the east by the Transylvanian Basin. Basically To the south Apuseni Mountains are bounded by the South Transylvanian Fault and in the northern part by the North Transylvanian Fault. Apuseni Mountains represents an isolated massif inside Carpathian arch, consisting of complex folds and thrust belts formed in Cretaceous period as results of interactions between multiples micropletes separated by Tethys ocean branches. The orogenic system of the Apuseni Mountains can be divided in two parts, in fact two main pre-Neogen structural units: The North Apuseni, composed of an early proterozocic Variscan basement belonging to the Inner Dacides as part of the Tisa geodynamic block and South Apuseni as the as aprt of Dacia Block (his northern part) which include a ophiolitic sequence of the Carpathians. The tectonic regime of the Apuseni Mountains consist of two type, such as: a compressive one, according to the tectonic structures, with SH max predominat oriented NW to SE, and in the marginal area is a predominat extensive tectonic regime. For the Mures Corridor (South Transylvanian Fault) the tectonic regime is strike slip type.

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DOI resolver: doi.org/10.5593/sgem2019/1.1/s05.115

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