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The deep structure of the North Anatolian Fault Zone

Research areas:

• Intérieurs planétaires (2011 - 2016)

Year:

2013

Authors:

• Andreas Fichtner
• Erdinc Saygin
• Tuncay Taymaz
• Paul Cupillard
• Yann Capdeville
• Jeannot Trampert

Journal:

EARTH AND PLANETARY SCIENCE LETTERS

Volume:

373

Pages:

109-117

Month:

JUL 1

ISSN:

0012-821X

BibTex:

@article{WOS:000321680300012, author = "Andreas Fichtner and Erdinc Saygin and Tuncay Taymaz and Paul Cupillard and Yann Capdeville and Jeannot Trampert", abstract = "Multi-scale full waveform inversion of complete continental- and regional-scale seismograms reveals the crustal and upper-mantle signature of the North Anatolian Fault Zone which shapes the neotectonics of Turkey and the eastern Mediterranean. Within the crust, the fault zone is mostly bounded by several high-velocity blocks, suggesting that it developed along the edges of continental fragments with high rigidity. Below the crust, the surface expression of the eastern and central parts of the North Anatolian Fault Zone correlate with a pronounced low-velocity band that extends laterally over 600 km. Around 100 km depth, the low-velocity band merges into the shallow Anatolian asthenosphere, thereby providing a link to the Kirka-Afyon-Isparta Volcanic Field and the Central Anatolian Volcanics. We interpret the low-velocity band beneath the North Anatolian Fault Zone as the upper-mantle expression of the Tethyan sutures that formed 60-15 Ma ago as a result of Africa-Eurasian convergence. The structurally weak suture facilitated the formation of the younger (less than 10 Ma) crustal fault zone. In this sense, the North Anatolian Fault Zone is not only a crustal feature, but a narrow zone of weakness that extends into the upper mantle. (C) 2013 Elsevier B.V. All rights reserved.", doi = "10.1016/j.epsl.2013.04.027", extra = "PICL", issn = "0012-821X", journal = "EARTH AND PLANETARY SCIENCE LETTERS", month = "JUL 1", pages = "109-117", title = "{T}he deep structure of the {N}orth {A}natolian {F}ault {Z}one", volume = "373", year = "2013", }

Abstract:

Multi-scale full waveform inversion of complete continental- and regional-scale seismograms reveals the crustal and upper-mantle signature of the North Anatolian Fault Zone which shapes the neotectonics of Turkey and the eastern Mediterranean. Within the crust, the fault zone is mostly bounded by several high-velocity blocks, suggesting that it developed along the edges of continental fragments with high rigidity. Below the crust, the surface expression of the eastern and central parts of the North Anatolian Fault Zone correlate with a pronounced low-velocity band that extends laterally over 600 km. Around 100 km depth, the low-velocity band merges into the shallow Anatolian asthenosphere, thereby providing a link to the Kirka-Afyon-Isparta Volcanic Field and the Central Anatolian Volcanics. We interpret the low-velocity band beneath the North Anatolian Fault Zone as the upper-mantle expression of the Tethyan sutures that formed 60-15 Ma ago as a result of Africa-Eurasian convergence. The structurally weak suture facilitated the formation of the younger (less than 10 Ma) crustal fault zone. In this sense, the North Anatolian Fault Zone is not only a crustal feature, but a narrow zone of weakness that extends into the upper mantle. (C) 2013 Elsevier B.V. All rights reserved.