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本报告系统地介绍了北山地区所建立的晚前寒武纪地层系统和剖面。根据岩石特征、沉积旋回、生物组合、地壳运动、冰川作用、地球化学和同位素地质年龄等,将其划分为四个系(群)和十二个组。分别论述了各群、组的主要特征、重要地层界线及时代划分与对比;探讨了该区晚前寒武纪古地理概况。尤其是着重解决了该区长期悬而未决的青白口系问题。提出了该区上前寒武系可分别与我国蓟县和峡东以及苏联的南乌拉尔剖面进行对比.本研究报告是对北山地区上前寒武系研究较系统而全面的总结。经地质矿产部科技司和中国地质科学院组织的评审认为,该报告“较大地提高了研究地区的地质研究程度,是一份较有价值的研究成果”.可供地质普查勘探、教学和科研人员参考.
This report systematically introduces the Late Precambrian stratigraphic system and profile established in the Beishan area. According to the characteristics of rocks, sedimentary cycles, biological assemblages, crustal movement, glaciation, geochemistry and isotopic geologic age, it is divided into four lines (groups) and twelve groups. The main features of each group and group, the division and comparison of important stratigraphic boundaries and epochs are discussed respectively. In particular, it focused on resolving the long-awaited question of Qingbaikoukou system in the area. It is proposed that the Upper Precambrian in the area can be compared with the South Ural section in Jixian and Gorge East of China and the Soviet Union respectively.The present report is a systematic and comprehensive summary of the study on the Precambrian in Beishan area. According to the review organized by the Department of Geology and Mineral Resources Technology and the Chinese Academy of Geological Sciences, the report “has greatly enhanced the degree of geological research in the study area and is a valuable research result.” It is available for geological survey exploration, teaching and research personnel reference.