L'ANOMALIE MAGNÉTIQUE DE SONA-BLAJ ET LA STRUCTURE PROFONDE DANS LE SW DE LA TRANSYLVANIE, DANS LE CONTEXTE DES DONNÉES CONCERNANT LES PROPRIÉTÉS MAGNÉTIQUES DE LA COUVERTURE SÉDIMENTAIRE

par FLORIAN IONESCU et PAMFIL POLONIC
Institut de Géophysique appliqué, Bucarest

The paper presents some new magnetic and geological data, which refute the presence of the neogene eruptive in the central part of the Transylvanian Depression. Quantitative interpretations of the aeromagnetic data, in connection with the established magnetic properties of the neogene formations, support this result and, in addition, complete the image of the deep structure of the central and southern part of the depression. The regional magnetic anomaly reflects the risc of the basaltic cover and the presence of a basic intrusive body on a crustal fracture, which shows the border between the Transylvanian domain and Southern Carpathians.