Seismic Imaging by Impulse Response for Studying Crustal Structure of the Central Tibet
Keywords:Seismic trace, Power spectrum, Impulse response, Reflection sequence, Subsurface geology.
Time-shifted source functions along with unwanted events produce the composite seismic trace. The time-shift varies according to the travel path of the source, which is reflected back from an interface. The arrival times of the reflected waves have been estimated as time-shifted sources in a technique with the application of Fourier transformation of composite seismic trace and source functions. Accurate time-shifts and amplitude coefficients are determined using the technique in the composite seismic traces. A very small time-shift has also been shown resolved. The technique is applied to INDEPTH seismic data and impulse responses are successfully obtained. Analyzed impulse response images have given the stratigraphic idea beneath the region of the central Tibet. High amplitude impressions in the implemented images have indicated the presence of a strong support that upholding the northern geology and high probability of further crustal change of the region. The technique impulse response is considered robust for the seismic reflection sequence analysis and can be used effectively for studying the subsurface geology. ÂÂ Keywords: Seismic trace; Power spectrum; Impulse response; Reflection sequence; Subsurface geology.
Â© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights
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