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对于前寒武纪，特别是中、上元古代、华北和扬子克拉通大地构造特征及其相互关系的认识是人们长期争议的问题之一．其核心在于两克拉通是否属于同一个大陆岩石圈板块．扬子克拉通及其北缘由于研究程度较低，部分地质体缺乏可靠地质年代学数据，形响了研究工作的进一步深入。本文就扬子克拉通北缘汉中碑坝和西乡地区重要地质体的形成时代作了系统的Ｒｂ－Ｓｒ、Ｓｍ－Ｎｄ和部分颗粒锆石Ｐｂ同位素蒸发年龄方法的同位素年代学分析和同位素地球化学示踪研究，探讨了扬子和华北克拉通前寒武纪上地幔性质和演化特征，以及它们之间的异同性，据此论证了两克拉通前寒武纪大地构造特征应属两个独立的地球化学体系的相互关系。
For the Precambrian, especially in the Middle and Proterozoic, North China and Yangtze cratonic tectonic characteristics and their relationship is one of the long-standing controversial issues. Its core lies in whether two cratons belong to the same continental lithosphere. Due to the low level of research and the lack of reliable geochronology data for some geologic bodies, the Yangtze Craton and its northern edge have shaped the further research work. In this paper, isotopic geochronology and isotopic geochronology of systematically Rb-Sr, Sm-Nd and Pb isotopic eruption ages of some granodiorites were studied in the formation of the Hanzhongbeiba and Xixiang important geologic bodies in the northern margin of the Yangtze craton. Tracer studies on the nature and evolution of the Upper Cambrian upper mantle in the Yangtze and North China Craton and the similarities and differences between them suggest that the Precambrian tectonic features of the two cratons should be two independent Geochemical system of the relationship between.