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二叠纪末海洋生态环境的恶化导致海洋底栖生物的大灭绝及早三叠世蓝细菌的爆发,有关这一时期我国华南蓝细菌化石的报道主要来自早三叠世早期的微生物岩。四川江油渔洞子剖面下三叠统飞仙关组下部巨鲕灰岩中首次发现有丰富的疑似蓝细菌,在种类和结构上与以往所报道的蓝细菌有着明显区别。疑似蓝细菌在巨鲕内和围岩中的富集,表明巨鲕灰岩的成因与疑似蓝细菌的活动有关,与飞仙关组底部微生物岩在成因上有着密切联系,显示早三叠世早期在这一地区发生了疑似蓝细菌的双幕式爆发,同时,暗示着这一地区二叠纪-三叠纪之交至少发生了两次海洋环境恶化及动物灭绝事件。疑似蓝细菌的爆发性生长,对于海洋生态环境的修复和海洋含氧条件的改善,进而为早三叠世末、中三叠世的生物全面复苏、辐射有着重要意义。
The deterioration of the marine environment at the end of the Permian resulted in the extinction of marine benthic organisms and the development of cyanobacteria in the Early Triassic. The reports of cyanobacteria fossils from southern China during this period mainly came from the early Early Triassic microbial rocks. The suspected cyanobacteria were found for the first time in the giant oolitic limestone beneath the Feixianguan Formation in the Lower Triassic Yuxianguan Formation in Jiangyou, Sichuan Province. There was a clear difference in species and structure from the previously reported cyanobacteria. The accumulation of suspected cyanobacteria in the giant oolites and in the surrounding rocks indicates that the genesis of the giant oolitic limestone is related to the activity of the suspected cyanobacteria and is closely related to the genesis of the microbial microbes at the bottom of the Feixianguan Formation, indicating that the Early Triassic In the early period, a double screenbreak of suspected cyanobacteria occurred in the area, at the same time, suggesting that at least two marine environment degradation and animal extinction occurred at the turn of the Permian-Triassic period in this area. The explosive growth of suspected cyanobacteria is of great significance to the restoration of the marine ecosystem and the improvement of the marine oxygen conditions, and thus to the complete recovery and radiation of the Middle Triassic organisms in the end of the Early Triassic.