Study Of Petrology Characteristics And Diagenesis Of Carbonate Rocks In Feixianguan Formation Of Triassic,Dukouhe Profile Of Sichuan

This article through many analysis means such as the field profiles of measured, outcrop observation, lithology description and sampling for the field outcrops and so on, combining indoor microscopic observation, cathode luminescence research methods, in the support of carbonate sedimentology,paleontology and diagenesis and related theory, we have been system researched petrology aracteristics, sedimentary facies and diagenesis of carbonate rocks in Feixianguan Formation of Triassic,Dukouhe profile of Sichuan Petrology is the basic research area of carbonate rock, and also is the most effective method for solving various problems of carbonate research field. The main rock of Feixianguan Formation of the interesting area is carbonate rock. The carbonate rock types include microcrystalline limestone,Muddy dolomicrite,Sparry gray dolomicrite, oolitic limestone, biomicrite, bioclastic limestone and so on. Through the microscopic observation and cathode luminescence, we have been expounding the characteristic of all kinds of rock. Based on previous studies with the field phenomenon, petrology characteristic and paleontology characteristic, we have been analysised the sedimentary environment and divided sedimentary subfacies.they are Tidal flat, shallow, flat lagoon and evaporation.The main diageneses of the carbonate rock of the interesting area include:micritization, cementation, compaction and pressure solution, recrystallization,dissolution, pyritization and silication. According to some special rock fabric and diagenesis characteristic, we have divided diagenetic environment of the Feixianguan Formation: infraneritic environment, shallow buried environment and middle-deep buried environment.