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讨论了下地壳拆沉作用的地球化学示踪方法，并以近来对秦岭－大别造山带和美国西部内华达岩基地区的研究成果为例，说明了下地壳拆沉在两地区壳－幔演化方面可能起的重要作用。
This paper discusses the geochemical tracing method of the lower crust delamination. Taking the recent research results of the Qinling-Dabie orogen and the Nevada rock base in the west of the United States as an example, the crust-mantle evolution of the lower crust in both areas is illustrated Aspects may play an important role.