Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 6, Pages 2502-2509Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL067715
Keywords
seismology; North Anatolian Fault; ambient noise; interferometry; crustal structure
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Funding
- Natural Environment Research Council (NERC), UK
- UK NERC [NE/I028017/1]
- NERC Geophysical Equipment Facility (SEIS-UK) [947]
- Ministry of Development of Turkey
- Natural Environment Research Council [1506774, NE/I028017/1] Funding Source: researchfish
- NERC [NE/I028017/1] Funding Source: UKRI
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Seismic images of active fault zones can be used to examine the structure of faults throughout the crust and upper mantle and give clues as to whether the associated deformation occurs within a narrow shear zone or is broadly distributed through the lower crust. Limitations on seismic resolution within the crust and difficulties imaging shallow structures such as the crust-mantle boundary (Moho) place constraints on the interpretation of seismic images. In this study we retrieve body wave reflections from autocorrelations of ambient seismic noise. The instantaneous phase coherence autocorrelations allow unprecedented ambient noise images of the North Anatolian Fault Zone (NAFZ). Our reflection profiles show a Moho reflected P wave and additional structure within the crust and upper mantle. We image a distinct vertical offset of the Moho associated with the northern branch of the NAFZ indicating that deformation related to the fault remains narrow in the upper mantle.
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