四川宣汉渡口河剖面三叠系飞仙关组碳酸盐岩岩石学特征及成岩作用研究
发布时间：2018-07-23 19:06
【摘要】：本文通过野外剖面的实测、露头观察和岩石宏观描述以及样品采样等多种分析手段,结合室内显微观察、阴极发光等微观研究方法,在碳酸盐沉积学、古生物学与成岩作用等相关理论的支撑下,对四川宣汉渡口河剖面三叠系飞仙关组地层碳酸盐岩石学特征、沉积相以及成岩作用等方面进行了系统的研究。岩石学是碳酸盐岩研究中最为基础的领域,也是解决碳酸盐岩研究领域各种问题最为有效的方法。四川宣汉渡口河剖面三叠系飞仙关组地层岩性以碳酸盐岩为主,基本不含碎屑岩,其中碳酸盐岩岩石类型主要有:微晶灰岩、泥微晶白云岩、亮晶灰质微晶白云岩、亮晶鲕粒灰岩、泥晶灰岩、生屑微晶灰岩、含生屑微晶灰岩等,通过室内显微观察与阴极发光分析等,详细阐述了各类岩石特征。在前人的研究基础上,结合野外宏观现象、室内岩石学特征以及古生物特征等,对四川宣汉渡口河剖面三叠系飞仙关地层沉积环境进行了分析,并划分了相应的沉积亚相,分别是潮坪、浅滩、泻湖和蒸发坪。渡口河剖面飞仙关组地层碳酸盐岩主要经历的成岩作用有:泥晶化作用、胶结作用、压实-压溶作用、重结晶作用等,根据一些特殊的岩石组构以及成岩作用特征,划分出研究剖面飞仙关地层经历的成岩环境:浅海海底成岩环境、浅埋藏成岩环境以及中-深埋藏成岩环境。
[Abstract]:In this paper, by means of field profile measurement, outcrop observation, rock macroscopic description and sample sampling, combined with indoor microscopic observation, catholuminescence and other microscopic research methods, carbonate sedimentology, Based on the related theories of paleontology and diagenesis, the carbonate petrology, sedimentary facies and diagenesis of the Triassic Feixianguan formation in the Dukou River section of Xuanhan, Sichuan Province were systematically studied. Petrology is the most basic field in carbonate research and the most effective method to solve various problems in carbonate research field. The stratigraphic lithology of the Triassic Feixianguan formation in the Xuanghan Dukou River section, Sichuan Province, is mainly carbonate rock, basically without clastic rock. The carbonate rock types mainly include: microcrystalline limestone, mudstone microcrystalline dolomite, bright grain-grained microcrystalline dolomite. The characteristics of various kinds of rocks are described in detail by laboratory microscopic observation and cathodoluminescence analysis, such as bright crystal oolitic limestone, argillite limestone, bioclastic microcrystalline limestone and bioclastic microcrystalline limestone. On the basis of previous studies, the sedimentary environment of the Triassic Feixianguan strata in the Xuanghan Dukou River section, Sichuan Province, is analyzed, and the corresponding sedimentary subfacies are divided according to the macroscopic phenomena in the field, the indoor petrological characteristics and the paleobiological characteristics. They are tidal flat, shallow beach, lagoon and evaporation flat. The diagenesis of carbonate rocks in the Feixianguan formation of Dukouhe section mainly includes: mud crystallization, cementation, compact-pressure solution, recrystallization, etc. According to some special rock fabric and diagenesis characteristics, The diagenetic environments of the Feixianguan strata in the research section are divided into three parts: shallow sea benthic diagenetic environment, shallow buried diagenetic environment and intermediate-deep burial diagenetic environment.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P588.245
本文编号：2140366
[Abstract]:In this paper, by means of field profile measurement, outcrop observation, rock macroscopic description and sample sampling, combined with indoor microscopic observation, catholuminescence and other microscopic research methods, carbonate sedimentology, Based on the related theories of paleontology and diagenesis, the carbonate petrology, sedimentary facies and diagenesis of the Triassic Feixianguan formation in the Dukou River section of Xuanhan, Sichuan Province were systematically studied. Petrology is the most basic field in carbonate research and the most effective method to solve various problems in carbonate research field. The stratigraphic lithology of the Triassic Feixianguan formation in the Xuanghan Dukou River section, Sichuan Province, is mainly carbonate rock, basically without clastic rock. The carbonate rock types mainly include: microcrystalline limestone, mudstone microcrystalline dolomite, bright grain-grained microcrystalline dolomite. The characteristics of various kinds of rocks are described in detail by laboratory microscopic observation and cathodoluminescence analysis, such as bright crystal oolitic limestone, argillite limestone, bioclastic microcrystalline limestone and bioclastic microcrystalline limestone. On the basis of previous studies, the sedimentary environment of the Triassic Feixianguan strata in the Xuanghan Dukou River section, Sichuan Province, is analyzed, and the corresponding sedimentary subfacies are divided according to the macroscopic phenomena in the field, the indoor petrological characteristics and the paleobiological characteristics. They are tidal flat, shallow beach, lagoon and evaporation flat. The diagenesis of carbonate rocks in the Feixianguan formation of Dukouhe section mainly includes: mud crystallization, cementation, compact-pressure solution, recrystallization, etc. According to some special rock fabric and diagenesis characteristics, The diagenetic environments of the Feixianguan strata in the research section are divided into three parts: shallow sea benthic diagenetic environment, shallow buried diagenetic environment and intermediate-deep burial diagenetic environment.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P588.245
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