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

Abstract 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...

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Main Authors: Sinan Özaydın, Sabri Bülent Tank, Mustafa Karaş
Format: Article
Language:English
Published: SpringerOpen 2018-03-01
Series:Earth, Planets and Space
Subjects:
Online Access:http://link.springer.com/article/10.1186/s40623-018-0818-4
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author Sinan Özaydın
Sabri Bülent Tank
Mustafa Karaş
author_facet Sinan Özaydın
Sabri Bülent Tank
Mustafa Karaş
author_sort Sinan Özaydın
collection DOAJ
description Abstract 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.
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spelling doaj.art-56808e58793e4ab5983d44d3ab9817e52022-12-22T03:45:51ZengSpringerOpenEarth, Planets and Space1880-59812018-03-017011910.1186/s40623-018-0818-4Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotelluricsSinan Özaydın0Sabri Bülent Tank1Mustafa Karaş2Kandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityKandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityKandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityAbstract 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.http://link.springer.com/article/10.1186/s40623-018-0818-4FluidNorth Anatolian FaultMagnetotelluricsCentral PontidesElectrical resistivitySeismicity
spellingShingle Sinan Özaydın
Sabri Bülent Tank
Mustafa Karaş
Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
Earth, Planets and Space
Fluid
North Anatolian Fault
Magnetotellurics
Central Pontides
Electrical resistivity
Seismicity
title Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
title_full Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
title_fullStr Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
title_full_unstemmed Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
title_short Electrical resistivity structure at the North-Central Turkey inferred from three-dimensional magnetotellurics
title_sort electrical resistivity structure at the north central turkey inferred from three dimensional magnetotellurics
topic Fluid
North Anatolian Fault
Magnetotellurics
Central Pontides
Electrical resistivity
Seismicity
url http://link.springer.com/article/10.1186/s40623-018-0818-4
work_keys_str_mv AT sinanozaydın electricalresistivitystructureatthenorthcentralturkeyinferredfromthreedimensionalmagnetotellurics
AT sabribulenttank electricalresistivitystructureatthenorthcentralturkeyinferredfromthreedimensionalmagnetotellurics
AT mustafakaras electricalresistivitystructureatthenorthcentralturkeyinferredfromthreedimensionalmagnetotellurics