Title: Research on sedimentary microfacies of the epicontinental sea platform of Jia 2 Member in Moxi Gas Field
Abstract: Based on the geologic background of Jia 2 Member in Jialingjiang Formation of the lower Triassic in Sichuan Basin,the li- thology,sedimentary structures,sedimentary rhyme,palaeoelimate and diagenetic evolution were analyzed.It is indicated that the tidal flat facies are not broadly developed in Jia 2 Member of Moxi Gas Field.Jia 2 Member was restricted to the evaporate epiconti nental sea carbonate platform deposits.The sedimentary facies in Jia 2 Member of Moxi Gas Field mainly include five sub-facies of platform flat,grain shoal,inter-bank sea,restricted lagoon and evaporate lagoon.The five sub-facies were divided into over 20 mi- crofacies.The depositional characteristics of similar tidal-flat environment existed only in Jia 2 Member B bed.The analysis on the sedimentary mierofaeies distribution of the key formations shows that the sedimentary environment evolution is subject to palaeogeog- raphy characteristic,relative sea-level and palaeoclimate,and the sedimentary microfaeies distribution characteristics are inheritable vertically.The sedimentary evolution model was given which was suitable for the epicontinental sea carbonate platform facies in the deposition of grained stone and dolomite rock of Jia 2 Member.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 7
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