DBPapers
10.5593/sgem2018/1.1/S05.117

REGIONAL ACTIVE FAULTS AS INTERPRETED ON CRUSTAL SEISMICITY, GRAVITY AND MAGNETIC DATA ACROSS THE MOESIAN PLATFORM AND THE NORTH DOBROGEAN OROGEN

I.M. Stanciu, D. Ioane
Saturday 29 September 2018 by Libadmin2018

18th International Multidisciplinary Scientific GeoConference SGEM 2018, www.sgem.org, SGEM2018 Conference Proceedings, ISBN 978-619-7408-35-5 / ISSN 1314-2704, 02-08 July, 2018, Vol.18, Issue 1.1, 939-946 pp, DOI: 10.5593/sgem2018/1.1/S05.117

ABSTRACT

The tectonic interpretation of crustal seismicity data have been recently performed for the central part of the Moesian Platform, having as main target the in-depth development of the Intramoesian Fault[1].
Seismological data for Romania, Bulgaria and the western Black Sea, compiled from published local, regional and global earthquake catalogues and merged into a database, were used to analyze the crustal seismicity (0–40 km) on multiple N-S trending sections across the North Dobrogean Orogen and the eastern part of the Moesian Platform, within 45.5N - 43N latitude and 27E–30E longitude.
The location of crustal faults, components of the geotectonic frame, was interpreted on regional gravity and aeromagnetic data.
The N-S regional distribution of crustal seismicity illustrates the in-depth development of quasi-vertical clusters of hypocenters, interpreted as highly active fault segments, alternating with sectors of low seismicity. Among the Sfantu Gheorghe, Peceneaga-Camena, Capidava–Ovidiu and Intramoesian faults, the Peceneaga-Camena fault is best illustrated by crustal seismic events.
When comparing the seismicity of the analyzed tectonic blocks, a decreasing seismicity was observed, starting from the North Dobrogean Orogen, as the most active; Central Dobrogea displays moderate seismicity, while Southern Dobrogea is characterized in the studied area by the lowest seismicity.

Keywords: crustal seismicity, regional active faults, geophysical interpretation, North Dobrogean Orogen, Moesian Platform


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