Application of natural gamma energy spectrum method for paleobathymetric recovery during carbonate deposition:A case study of M55 sub-member of Guanjiaya section in Xing County of Shanxi Province
The paleobathymetric analysis is of great significance to the paleoenvironment reconstruction and tecton-ic evolution of the basin.At present,paleobathymetric recovery is mainly qualitative,with high requires of sample reliability and is easy to be limited by the data condition.The natural gamma energy spectrum method has the ad-vantages of accessiblity,low cost and few controlled factors,and can be used to semi-quantitative paleobathy-metric recovery based on bathymetric function.However,this method is mostly used in terrestrial clastic rock dep-osition and its suitability for marine carbonate rock deposition is not clear.Taking the M55 sub-member of Ordo-vician Majiagou Formation in Guanjiaya section of Ordos Basin as an example,the authors in this paper used the natural gamma energy spectrum method to reconstruct the paleobathymetry of carbonate sediments.This method has good consistency and same results obtained by carbon isotopic method,biological heritage method and rock fabric method.The credibility and practicability of natural gamma energy spectrum method in recovering paleoba-thymetric recovery was also proven.
paleobathymetrynatural gamma energy spectrum methodcarbon and oxygen isotopeMajiagou For-mationcarbonate
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