Seismic tomography of the North Anatolian Fault: New insights into structural heterogeneity along a continental strike-slip fault
Elvira Papaleo (Corresponding Author), David G Cornwell, Nicholas Rawlinson
Geology and Geophysics
Knowledge of the structure of continental strike-slip faults within the lithosphere is essential to understand where the deformation occurs and how strain localizes with depth. With the aim to improve the constraints on the lower crust and upper mantle structure of a major continental strike-slip fault, we present a high-resolution teleseismic tomography of the North Anatolian Fault Zone (NAFZ) in Turkey. Our results highlight the presence of a relatively high velocity body between the two branches of the fault and significant along-strike variations in the NAFZ velocity structure over distances of ∼20 km. We interpret these findings as evidence of laterally variable strain focussing caused by preexisting heterogeneity. Low velocities observed in the crust and upper mantle beneath the NAFZ support the presence of a narrow shear zone widening in the upper mantle, where we constrain its width to be ∼50 km.
Geophysical Research Letters
https://doi.org/10.1002/2017GL072726
North Anatolian Fault
seismic tomography
strike-slip fault
upper mantle
fault zone
mantle structure
velocity structure
lower crust
low speed
Papaleo, E., Cornwell, D. G., & Rawlinson, N. (2017). Seismic tomography of the North Anatolian Fault: New insights into structural heterogeneity along a continental strike-slip fault. Geophysical Research Letters, 44(5), 2186-2193. https://doi.org/10.1002/2017GL072726
Seismic tomography of the North Anatolian Fault : New insights into structural heterogeneity along a continental strike-slip fault. / Papaleo, Elvira (Corresponding Author); Cornwell, David G; Rawlinson, Nicholas.
In: Geophysical Research Letters, Vol. 44, No. 5, 16.03.2017, p. 2186-2193.
Papaleo, E, Cornwell, DG & Rawlinson, N 2017, 'Seismic tomography of the North Anatolian Fault: New insights into structural heterogeneity along a continental strike-slip fault', Geophysical Research Letters, vol. 44, no. 5, pp. 2186-2193. https://doi.org/10.1002/2017GL072726
Papaleo E, Cornwell DG, Rawlinson N. Seismic tomography of the North Anatolian Fault: New insights into structural heterogeneity along a continental strike-slip fault. Geophysical Research Letters. 2017 Mar 16;44(5):2186-2193. https://doi.org/10.1002/2017GL072726
Papaleo, Elvira ; Cornwell, David G ; Rawlinson, Nicholas. / Seismic tomography of the North Anatolian Fault : New insights into structural heterogeneity along a continental strike-slip fault. In: Geophysical Research Letters. 2017 ; Vol. 44, No. 5. pp. 2186-2193.
@article{0202b18491a04264a9d800be0054a309,
title = "Seismic tomography of the North Anatolian Fault: New insights into structural heterogeneity along a continental strike-slip fault",
abstract = "Knowledge of the structure of continental strike-slip faults within the lithosphere is essential to understand where the deformation occurs and how strain localizes with depth. With the aim to improve the constraints on the lower crust and upper mantle structure of a major continental strike-slip fault, we present a high-resolution teleseismic tomography of the North Anatolian Fault Zone (NAFZ) in Turkey. Our results highlight the presence of a relatively high velocity body between the two branches of the fault and significant along-strike variations in the NAFZ velocity structure over distances of ∼20 km. We interpret these findings as evidence of laterally variable strain focussing caused by preexisting heterogeneity. Low velocities observed in the crust and upper mantle beneath the NAFZ support the presence of a narrow shear zone widening in the upper mantle, where we constrain its width to be ∼50 km.",
author = "Elvira Papaleo and Cornwell, {David G} and Nicholas Rawlinson",
note = "Acknowledgments DANA (Dense Array for Northern Anatolia) is part of the Faultlab project, a collaborative effort by the University of Leeds, Boğazi{\cc}i University Kandilli Observatory and Earthquake Research Institute (BU-KOERI), and Sakarya University. Major funding was provided by the UK Natural Environment Research Council (NERC) under grant NE/I028017/1. Equipment was provided and supported by the NERC Geophysical Equipment Facility (SEIS-UK). This project is also supported by Boğazi{\cc}i University Scientific Research Projects (BAP) under grant 6922 and Turkish State Planning Organization (DPT) under the TAM project, number 2007K120610. We are indebted to the Faultlab seismological fieldwork team members Sebastian Rost, Greg Houseman, David Thompson, Sandra Karl, Luke Jackson, Hannah Bentham, Ekbal Hussain, Selda Altuncu Poyraz, Uğur Teoman, Niyazi T{\"u}rkelli, Metin Kahraman, Murat Utkucu, and Levent G{\"u}len. Victoria Lane (SEIS-UK) provided invaluable technical and practical seismological assistance. The seismic data set can be found in the references.",
doi = "10.1002/2017GL072726",
journal = "Geophysical Research Letters",
publisher = "AMER GEOPHYSICAL UNION",
T1 - Seismic tomography of the North Anatolian Fault
T2 - New insights into structural heterogeneity along a continental strike-slip fault
AU - Papaleo, Elvira
AU - Cornwell, David G
AU - Rawlinson, Nicholas
N1 - Acknowledgments DANA (Dense Array for Northern Anatolia) is part of the Faultlab project, a collaborative effort by the University of Leeds, Boğaziçi University Kandilli Observatory and Earthquake Research Institute (BU-KOERI), and Sakarya University. Major funding was provided by the UK Natural Environment Research Council (NERC) under grant NE/I028017/1. Equipment was provided and supported by the NERC Geophysical Equipment Facility (SEIS-UK). This project is also supported by Boğaziçi University Scientific Research Projects (BAP) under grant 6922 and Turkish State Planning Organization (DPT) under the TAM project, number 2007K120610. We are indebted to the Faultlab seismological fieldwork team members Sebastian Rost, Greg Houseman, David Thompson, Sandra Karl, Luke Jackson, Hannah Bentham, Ekbal Hussain, Selda Altuncu Poyraz, Uğur Teoman, Niyazi Türkelli, Metin Kahraman, Murat Utkucu, and Levent Gülen. Victoria Lane (SEIS-UK) provided invaluable technical and practical seismological assistance. The seismic data set can be found in the references.
N2 - Knowledge of the structure of continental strike-slip faults within the lithosphere is essential to understand where the deformation occurs and how strain localizes with depth. With the aim to improve the constraints on the lower crust and upper mantle structure of a major continental strike-slip fault, we present a high-resolution teleseismic tomography of the North Anatolian Fault Zone (NAFZ) in Turkey. Our results highlight the presence of a relatively high velocity body between the two branches of the fault and significant along-strike variations in the NAFZ velocity structure over distances of ∼20 km. We interpret these findings as evidence of laterally variable strain focussing caused by preexisting heterogeneity. Low velocities observed in the crust and upper mantle beneath the NAFZ support the presence of a narrow shear zone widening in the upper mantle, where we constrain its width to be ∼50 km.
AB - Knowledge of the structure of continental strike-slip faults within the lithosphere is essential to understand where the deformation occurs and how strain localizes with depth. With the aim to improve the constraints on the lower crust and upper mantle structure of a major continental strike-slip fault, we present a high-resolution teleseismic tomography of the North Anatolian Fault Zone (NAFZ) in Turkey. Our results highlight the presence of a relatively high velocity body between the two branches of the fault and significant along-strike variations in the NAFZ velocity structure over distances of ∼20 km. We interpret these findings as evidence of laterally variable strain focussing caused by preexisting heterogeneity. Low velocities observed in the crust and upper mantle beneath the NAFZ support the presence of a narrow shear zone widening in the upper mantle, where we constrain its width to be ∼50 km.
U2 - 10.1002/2017GL072726
DO - 10.1002/2017GL072726
JO - Geophysical Research Letters
JF - Geophysical Research Letters
10.1002/2017GL072726Licence: Unspecified
Seismic tomography of the North Anatolian Fault:New insights into structural heterogeneityalong a continental strike-slip fault
© 2017. American Geophysical Union | All rights reserved.
Final published version, 2.41 MBLicence: Other