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通过对辽宁地区出露的新元古代殷屯组、永宁组调查研究取得了新认识,认为辽宁地区存在南华纪地层,以新元古代殷屯组、永宁组为代表,可划分出二次冰川活动(二个冰期和一次间冰期)的沉积,自下而上为殷屯冰期(第一次冰期)、八家子间冰期、河冰期(第二次冰期).依据殷屯组和永宁组冰碛物组合特点及接触关系,并结合碎屑锆石U-Pb(LA-ICP-MS)同位素测年成果,推测辽宁南华系殷屯组、永宁组形成时代应小于1000 Ma,与南方南华纪形成的时间基本接近或略早(约850 Ma).
Through the discovery of the Neoproterozoic Yintun Formation and Yongning Formation in Liaoning Province, new understanding has been reached. It is believed that the Nanhuaji Formation exists in Liaoning Province. The Neoproterozoic Yintun Formation and Yongning Formation are representative of the second glacier From the bottom up to the Yin Tuning glacial (the first glacial), the eight Jiazizi glacial and the river glacial (the second glacial), based on the sediments of the Yintun Formation and the Yongning Formation Combining with the dating results of detrital zircon U-Pb (LA-ICP-MS), we conclude that the formation age of the Yintun Formation and Yongning Formation of the Nanhua System in Liaoning Province should be less than 1000 Ma, The formation time is basically close or slightly earlier (about 850 Ma).