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根据大量的区调资料，利用断陷盆地的分析方法，通过地层剖面的横向对比，认为滹沱群的豆村亚群、东冶亚群以及系舟山的下元古界七东山组为侧向相变关系，郭家寨亚群形成于其后。在详细研究岩性、岩相的变化规律以及盆缘断裂特征的基础上，初步建立了早元古代的岩石地层格架，分析了早元古代裂陷海槽的发育史。
According to a large number of regional adjustment data, by means of analysis of fault-depression basins and lateral comparison of stratigraphic profiles, it is considered that the Beidun sub-group, Dongye sub-group and the Lower Proterozoic Qidongshan Formation of Zhoushan Group are lateral facies Change relationship, Guojiazhai subgroup formed in the later. Based on the detailed study of lithology, lithofacies variation and basin margin fracture features, the Early Proterozoic lithostratigraphic framework was established and the developmental history of the Early Proterozoic rift trough was analyzed.