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

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 l...

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Bibliographic Details
Published inInternational Multidisciplinary Scientific GeoConference : SGEM Vol. 18; no. 1.1; pp. 939 - 946
Main Authors Stanciu, Irina-Marilena, Ioane, Dumitru
Format Conference Proceeding
LanguageEnglish
Published Sofia Surveying Geology & Mining Ecology Management (SGEM) 01.01.2018
Subjects
Data
Earthquakes
Fault lines
Fault location
Faults
Geological faults
Gravitation
Gravity
Magnetic data
Orogeny
Plate tectonics
Regional development
Seismic activity
Seismicity
Seismological data
Seismology
Studies
Tectonics
Bulgaria
Black Sea
Romania
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Summary: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.
ISSN:1314-2704
DOI:10.5593/sgem2018/1.1/S05.117