Amplitudes of Earth's orbital parameters and fluctuations of deep-water dolomitization
Due to the evident correlation between fluctuations in dolomitization intensity in Phanero-zoic geological strata and significant geological events throughout Earth's history,it is increasingly impor-tant to understand the mechanisms underlying these fluctuations in relation to long-term magnesium and carbon cycles in terrestrial and marine environments,atmospheric processes,and climate change over ex-tended periods.In this study,time series analysis and coupling analysis are analyzed based on high-resolu-tion X-ray diffraction data to reveal the slope amplitude modulation cycle recorded by the deep-water dolo-mite cycle of the Shahejie Formation in the Bohai Bay Basin.Combining the Quaternary dolomite cycle in Van Lake,Turkey,with the dolomitization events during the Permian-Triassic period,we discussed the coupling relationship between the fluctuations in deep-water dolomitization intensity over the Phanerozoic eon and the amplitude of various Earth orbital parameters across different time scales.Building on the ana-lysis of the salinity evolution characteristics of the Sha 3 submember,it is proposed that the amplitude-modulation effect of Earth's orbital parameters may influence microbial ecological stress and the fluctuations in temperature and pH of fluids through changes in climate and environmental factors.This,in turn,plays a significant role in regulating orbital deep-water dolomitization intensity during the Phanerozoic eon.This study provides a novel perspective for the exploration of the"dolomite problem".
dolomiteastronomical cycleamplitude modulationmicrobesShahejie FormationBohai Bay Basin
万方数据
维普
