Short-term spectral analysis of ODP Hole 114-704B, supplement to: Mwenifumbo, C J; Blangy, J P (1991): Short-Term spectral analysis of downhole logging measurements from Site 704. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 577-585

C J Mwenifumbo & J P Blangy
Short-term spectral analysis was carried out on geochemical logging data from ODP Site 704. The FFT was used to compute the amplitude spectra of short-term overlapping segments to produce depth-period-amplitude spectrograms of the logging data. The spectrograms provided a means of evaluating the significance of the observed periodic components. The periodic components that were consistently present and prominent across a given record interval were considered to be significant. Changes in the spectrogram characteristics seem to...
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