摘要
<正>青藏高原东北缘是整个高原向大陆内部扩展的前缘部位,也是其最新和正在形成的重要组成部分。因此,其隆升时空格局及构造变形过程是探讨青藏高原隆升机制的决定性因素。变形强烈、高差较大的祁连山地区已经获得了大量的年代学数据,但祁连山以北地区因为相对高差较小,传统热年代学无法获得其隆升信息,形成了研究空区。因此确定这些地区的隆升情况便成为了研究青藏高原东北缘扩展的关键。榆木山位于位于祁连山向东北部扩展的最前缘,记录着青藏高原东北缘构造隆升和扩展的信息。
引文
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