TY - JOUR
T1 - Teleseismic evidence for a break-off subducting slab under Eastern Turkey
AU - Lei, Jianshe
AU - Zhao, Dapeng
N1 - Funding Information:
We thank the IRIS Data Management Center for providing the waveform data used in this study. R. Engdahl provided the hypocentral parameters of the teleseismic events he relocated. We are grateful to T. Hirano for his assistance at the data processing stage, to Y. Ai for thoughtful discussion. This work was partially supported by Development Foundation of Science and Technology from ICD (200604) to J. Lei and a research grant (Kiban-A 17204037) from the Japanese Ministry of Education and Science to D. Zhao. The GMT software package distributed by Wessel and Smith [49] was used for plotting the figures. Prof. G.D. Price and an anonymous reviewer provided constructive comments and suggestions, which improved the manuscript.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2007/5/15
Y1 - 2007/5/15
N2 - We present seismic images of the upper mantle beneath Eastern Turkey determined by teleseismic tomography. The data are measured precisely from seismograms recoded by the Eastern Turkey Seismic Experiment network consisting of 29 portable stations and 2 permanent stations. Our results show that obvious high-velocity (high-V) anomalies of up to 2% are interrupted beneath Eastern Turkey, and subcrustal earthquakes occurred along these high-V anomalies. Pronounced low-velocity (low-V) anomalies are visible from the Arabian foreland basin in the southwest to the Caucasus region in the northeast, which extend down to about 400 km depth. These low-V anomalies are consistent with the existence of Late Cenozoic volcanism in the region. These results provide new constraints on the geodynamic processes in the east Anatolian plateau, suggesting that the break-off of the Arabian slab may play an important role in the formation of the Anatolian plateau and the volcanism in the region. These processes might be related to the collision of the Arabian plate with the Eurasian plate.
AB - We present seismic images of the upper mantle beneath Eastern Turkey determined by teleseismic tomography. The data are measured precisely from seismograms recoded by the Eastern Turkey Seismic Experiment network consisting of 29 portable stations and 2 permanent stations. Our results show that obvious high-velocity (high-V) anomalies of up to 2% are interrupted beneath Eastern Turkey, and subcrustal earthquakes occurred along these high-V anomalies. Pronounced low-velocity (low-V) anomalies are visible from the Arabian foreland basin in the southwest to the Caucasus region in the northeast, which extend down to about 400 km depth. These low-V anomalies are consistent with the existence of Late Cenozoic volcanism in the region. These results provide new constraints on the geodynamic processes in the east Anatolian plateau, suggesting that the break-off of the Arabian slab may play an important role in the formation of the Anatolian plateau and the volcanism in the region. These processes might be related to the collision of the Arabian plate with the Eurasian plate.
KW - Eastern Turkey
KW - break-off
KW - geodynamic process
KW - subducted slab
KW - teleseismic tomography
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U2 - 10.1016/j.epsl.2007.02.011
DO - 10.1016/j.epsl.2007.02.011
M3 - Article
AN - SCOPUS:34247097464
VL - 257
SP - 14
EP - 28
JO - Earth and Planetary Sciences Letters
JF - Earth and Planetary Sciences Letters
SN - 0012-821X
IS - 1-2
ER -