TY  - JOUR
TI  - Assessment of crustal thinning and tectonic stress distribution of Gülbahçe fault zone and its surroundings (İzmir, West Türkiye) using gravity and magnetic anomalies
AB  - Gülbahçe Fault Zone (GFZ) is a significant tectonic structure and seismic source for İzmir city and its surroundings. The major earthquakes occurred at the surroundings of GFZ are 2005 Seferihisar, 2020 Samos Island-Aegean Sea and 2021 Seferihisar earthquakes. In this study, the crustal thinning and tectonic stress distribution of GFZ and its surroundings were analyzed by using the new gravity and magnetic data. The correspondence analysis was applied by appraising together the magnetic and free-air anomaly data. Moreover, the average density of the subsurface structure was calculated by applying the Parasnis method. The deviatoric stress calculation was executed and the change of the physical properties that controls the gravity and magnetic anomaly of the crustal structure of the GFZ and its surroundings from north to south was investigated. Therefore, the average density values, which were obtained from gravity anomalies, were computed as 2.59 gr / cm3 in the north of the study region and it decreased to 2.06, 1.8 and 1.49 gr / cm3 towards to the south. The free- air gravity anomaly values were between 0-70 mGal and the magnetic anomalies were between -450-150 nT. The deviatoric stress values were between -0.2-0.1 MPa.
AU  - DOĞRU, FİKRET
AU  - ÇIRMIK, Ayça
AU  - UNLU, Ece
AU  - Ankaya Pamukçu, Oya
AU  - Malaliçi, Barış Can
DO  - 10.19111/bulletinofmre.1029265
PY  - 2022
JO  - Bulletin of the mineral research and exploration
IS  - 169
SN  - 0026-4563
SP  - 105
EP  - 119
DB  - TRDizin
UR  - http://search/yayin/detay/1170520
ER  -