CAJ | 학술논문

陆源碎屑岩和碳酸盐岩的混合沉积是陆表海重要的沉积现象,反映了其沉积特征.鄂尔多斯东北部大牛地气田本溪组和太原组是典型的陆表海碎屑岩-碳酸盐岩混积层系.结合区域地质研究,建立了陆表海碎屑岩-碳酸盐岩混积层系的沉积相模式.根据华北晚古生代聚煤盆地的地质背景和沉积演化过程,认为大牛地气田本溪组、太原组是陆表海碎屑滨岸-碳酸盐岩台地混积体系和海岸平原沉积体系:本溪组下段为碎屑滨岸相局限浅海亚相,上段为碳酸盐岩台地相和碎屑滨岸相;太原组下段为三角洲相和碎屑滨岸相→碎屑滨岸相;中段为盆控型泥炭沼泽相→碳酸盐岩台地相和碎屑滨岸相;上段为三角洲相和碎屑滨岸相→碳酸盐岩台地相和碎屑滨岸相→三角洲相和碎屑滨岸相→碳酸盐岩台地相和碎屑滨岸相.
륙원쇄설암화탄산염암적혼합침적시륙표해중요적침적현상,반영료기침적특정.악이다사동북부대우지기전본계조화태원조시전형적륙표해쇄설암-탄산염암혼적층계.결합구역지질연구,건립료륙표해쇄설암-탄산염암혼적층계적침적상모식.근거화북만고생대취매분지적지질배경화침적연화과정,인위대우지기전본계조、태원조시륙표해쇄설빈안-탄산염암태지혼적체계화해안평원침적체계:본계조하단위쇄설빈안상국한천해아상,상단위탄산염암태지상화쇄설빈안상;태원조하단위삼각주상화쇄설빈안상→쇄설빈안상;중단위분공형니탄소택상→탄산염암태지상화쇄설빈안상;상단위삼각주상화쇄설빈안상→탄산염암태지상화쇄설빈안상→삼각주상화쇄설빈안상→탄산염암태지상화쇄설빈안상.
The mixed clastic-carbonate sediment is the important sediment phenomenon which can react characteristic deposits of the epicontinental sea. The Benxi and Taiyuan Formations in the Daniudi Gasfield located in the northeast of Ordos are typical series of the mixed clastic-carbonate sediments deposited in the epicontinental sea. According to these features on lithologic assemblage with the study on regional geology, the pattern has been first created on sedimentary facies of the mixed clastic-carbonate sediments in the epicontinental sea in this paper. Sedimentary environment of Benxi and Taiyuan Formations is numerously considered as barrier clastic coastal environment. Based on geologic setting and sedimentary evolutionary process of the coal bearing basin in North China during the Late Paleozoic,the Benxi and Taiyuan Formations in Daniudi Gasfeild belong to epicontinental sea clastic coastal-carbonate platform mixed depositional system and coastal plain depositional system in this paper. The lower member of the Benxi Formation of Upper Carboniferous belongs to restricted clastic coastal facies and upper member belongs to carbonate platform and clastic coastal facies. The Lower member of the Taiyuan Formation of Upper Carboniferous-Lower Permian belongs to delta facies and clastic coastal facies→clastic coastal facies,the middle member belongs to basin-controlled peat marsh facies→carbonate platform facies and clastic coastal facies, the upper member belongs to delta facies and clastic coastal facies→carbonate platform facies and clastic coastal facies→delta facies and clastic coastal facies→carbonate platform facies and clastic coastal facies.