Some Problems on the Study of Sedimentary Diagenesis

In 1960s of the last century,due to the introduction of physicochemical kinetics and fiacies equilibrium of minerals under low temperature and low pressure conditions,the study on sedimentary diagenesis has achieved obvious breakthroughs and advances;in the meantime,the organic geochemistry also enhanced the research on the sedimentary diagenesis.At present,the study on the sedimentary diagenesis has become the integrated research with wide scales and multi disciplines including tectonics,basin analysis,sedimentology,physiochemistry and organic geochemistry,and so on.The great demands on petroleum and solid mineral resources have provided the impetus to the deep research on the sedimentary diagenesis.And,the geological processes such as petroleum formation and accumulation,variation of reservoir properties are all involved in the sedimentary diagenesis;the enrichment of some stratigraphically-controlled mineral deposits is related to the basin fillings,conversion of basin-mountain lithofacies as well as dynamics of fluid flow and physicochemical behavior.Since 1970s,all these researches have gained considerable achievements.In recent years,investigations on the diagenetic processes relevant to marine sedimentation,silicon,Mn and carbonate sediments,tectonic background,isotopes,organism evolution have also gotten important advances and become hotspots in these fields.