基性岩墙群是重建古陆块聚合、伸展乃至裂解的关键标志之一。通过对秦岭造山带及相邻的华北地块、扬子地块元古代基性岩墙群的时空对比综合分析表明 ,华北地块区发育 2 30 0 Ma±和 170 0～ 12 0 0 Ma的两期基性岩墙群 ,分别代表了新太古代和古元古代华北古陆块的聚合、伸展过程 ;扬子地块区发育 80 0～ 6 2 0 Ma的基性岩墙群 ,反映了新元古代扬子古陆块的聚合、伸展过程。认为前震旦纪华北地块和扬子地块可能是独立古陆块或不同古陆块的组成部分。晋宁造山作用 ( 110 0～85 0 Ma)和澄江伸展、裂解作用 ( 80 0 Ma± )是可与新元古代 Rodinia超大陆聚合、裂解过程进行对比、研究的重要时期 The basic dyke swarm is one of the key symbols of rebuilding the ancient landmass in aggregation, extension and even cracking. Based on the time-space comprehensive analysis of the Proterozoic basic dyke swarms in the Qinling orogenic belt and the adjacent North China block and the Yangtze block, it is shown that the two blocks in the North China block area are 230 Ma ± and 170 0 ~ 120 Ma Periodic basic dyke swarms respectively represent the polymerization and extension processes of the Neopaleozoic and Paleoproterozoic ancient North China continent blocks. The basic dyke swarm of 80 ~ 6 2 0 Ma developed in the Yangtze block area, Ancient Yangtze ancient landmass polymerization, stretching process. It is believed that the Pre-Sinian North China Block and the Yangtze Block may be part of an independent paleocontinent block or a different ancient land block. The Jinning orogeny (110 0 ~ 85 0 Ma) and the Chengjiang extension and the cleavage (80 0 Ma ±) are important periods that can be compared and studied with the Neoproterozoic Rodinia supercontinent polymerization and pyrolysis process