本文从阐述中国东南部晚元古多旋回火山作用,特殊的火山—沉积建造及有规律的构造组合形式入手,论证了该地区晚元古界地层发育特征和空间上一条重要相区界线,并提出了中国东南部存在一条古裂谷带的观点。通过对古裂谷带特征的详细论述,阐明了古裂谷带的研究对揭示中国东南部多种金属成矿作用和开展第二轮找矿的理论意义和巨大经济价值。 Based on the elaboration of the Neoproterozoic and multi-volcanic volcanism, special volcanic-sedimentary structures and regular tectonic assemblages in the southeastern part of China, this paper demonstrates the development characteristics of Neoproterozoic stratigraphy and the boundary of an important phase in space Put forward the view that there is an ancient rift valley in southeastern China. Through the detailed discussion of the features of the ancient rift zone, the study on the ancient rift zone has been clarified to reveal the theoretical significance and great economic value of various metallogenic processes in the southeastern China and the second round of ore prospecting.