Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
Earth, Planets and Space, cilt.70, sa.1, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Kısa Makale
- Cilt numarası: 70 Sayı: 1
- Basım Tarihi: 2018
- Doi Numarası: 10.1186/s40623-018-0818-4
- Dergi Adı: Earth, Planets and Space
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: Fluid, North Anatolian Fault, Magnetotellurics, Central Pontides, Electrical resistivity, Seismicity
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Boğaziçi Üniversitesi Adresli: Evet
Özet
Magnetotelluric data analyses and three-dimensional modeling techniques were implemented to investigate the crustal electrical structure in the North-Central Turkey, along a 190-km-long profile crossing Çankırı Basin, İzmir–Ankara–Erzincan Suture Zone and Central Pontides. In this area, the segment of the North Anatolian Fault (NAF) shows 280-km-long restraining bend, where it was near the focus of the hazardous 1943 Tosya Earthquake (M: 7.6). Structure around the NAF exhibits resistive characteristics at both sides of the fault reaching to at least 25 km of depth. Fluids below the brittle–ductile transition were not detected which will nucleate earthquakes in the area. This resistive structure implies an asperity zone of the NAF, which was ruptured in 1943. The presence of a fluid-bearing upwelling conductive anomaly in Central Pontides may suggest that beneath the deep brittle crust, there may exists a fluid-enriched conductive forearc region, which may have caused by a prograde source related to paleo-tectonic processes.[Figure not available: see fulltext.].