Reconstruction of nonlinear geochemical dynamics of elemental sedimentation based on power spectral analysis of time sequence

Maximum entropy spectral analysis and multidimensional cross-spectral analysis are two important tools for studying periodicity of elemental sedimentation in strata. They are applied to the study of the Devonian lensoid limestone formation in the Nandan-Hechi basin of Guangxi, China. Results show that all major element oxides of the sedimentary formation display a consistent change period of about 4 m; however, elements do not change in step. Nonlinear geochemical dynamic processes of elemental sedimentation through sea-floor fluids may be effectively reconstructed based on power spectral analyses.