Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics

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...

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Bibliographic Details
Published in:Earth, planets, and space planets, and space, 2018-03, Vol.70 (1), p.1-9, Article 49
Main Authors: Özaydın, Sinan, Tank, Sabri Bülent, Karaş, Mustafa
Format: Article
Language:English
Subjects:
1. Geomagnetism
Asperity
Central Pontides
Computational fluid dynamics
Ductile-brittle transition
Earth and Environmental Science
Earth Sciences
Earthquakes
Electrical resistivity
Express Letter
Fluid
Fracture mechanics
Geology
Geophysics/Geodesy
Magnetotellurics
North Anatolian Fault
Seismic activity
Seismicity
Tectonic processes
Three dimensional analysis
Three dimensional models
Upwelling
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Summary: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.
ISSN:1880-5981
1880-5981
DOI:10.1186/s40623-018-0818-4