【摘要】 在对四川盆地东北部宣汉县渡口镇羊鼓洞二叠系剖面详细研究的基础上,结合测井、地震等资料,对四川盆地东北部二叠系沉积相进行了分析,识别出了滨岸沼泽相、台地蒸发岩相、局限台地相、开阔台地相、台地边缘生物礁滩相、碳酸盐岩缓坡相和台盆相等7种沉积相带。指出二叠纪研究区发育下二叠统梁山组沉积期、栖霞组—茅口组沉积期和上二叠统吴家坪组—长兴组沉积期3次大的海侵—海退沉积旋回。在沉积演化和古地理分布研究的基础上,建立了研究区碳酸盐岩的沉积演化模式。更多还原

【Abstract】 By the research of outcrop profiles,logging profiles,logs and seismic data,seven types of sedimentary facies have been recognized on Permian Yanggudong profile in the Dukou town,Xuanhan County,NE Sichuan basin.The seven facies including strand swamp facies,platform evaporate facies,restraint platform facies,open platform facies,platform marginal reef facies,shelving facies and basinal facies.The study area developed three big transgressive-regressive cycles in the Permian period.On the basis of research of sedimentary evolution and palaeogeographic distribution,the sedimentary evolution model of carbonate facies is built in the northeast of the Sichuan basin.更多还原