The Research Of The Carbonatite Micro-faces Of The Lveyang Group In Lveyang,Hanzhong,Shanxi Province

In this paper,the sedimentary facies of carbonate rocks of the Lveyang Formation in Lveyang County,Hanzhong,Shanxi province were studied,and the following main results were obtained:1.According to the newly-discovered of conodonts and foraminiferas,the Lveyang group is considered to be assigned to the Devonian to the Permian.2.Fifteen types of microfacies were identified in the carbonate rocks of Lveyang group in the study area.Merge them into 8 sedimentary facies zones.3.It is considered that the sedimentary models of Lveyang group are shallowedged carbonate platform and confined basin.4.The sedimentary evolution history of the Lveyang Group was analyzed,and it was considered that the Lveyang group experienced the shallow water carbonate platform-semi deep water,the evolution of deep water sedimentary-confined platform deposition,the deep water deposition time is relatively short,after entering a longer period of limitation basin until the ocean basin closes,the change of sedimentary environment is controlled by the evolution of Mianlve basin.