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用花岗岩的全岩化学成分对格尔木－额济纳旗地学断面内各个地体花岗岩的岩石组合、岩石化学特征及构造类型进行了分析与对比．从北山地区到祁连地区花岗岩的酸度和铝饱和度均有增加的趋势．北山区以岛弧型＋陆弧型（ＩＡＧ＋ＣＡＧ型）、陆弧型（ＣＡＧ型）居多；祁连区以造山后型（ＰＯＧ型）为主．每个地体均出现少量非造山花岗岩，在北山区有大洋斜长花岗岩的成分，但全区未判别出典型的陆－陆碰撞型花岗岩．
The whole rock chemistry of granite was used to analyze and contrast the rock assemblages, petrochemical characteristics and tectonic types of the granites in the Geermu-Ejinaqi geostatistics section. The acidity and aluminum saturation of granite from Beishan area to Qilian area all increased. Beishan area is dominated by IAG + CAG type and CAG type. Qilian area is dominated by POG type. There are a few non-orogenic granites in each terrane and the composition of oceanic plagioclase granite in Beishan area. However, no typical continental-continental collisional granites have been identified in this area.