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本文所论述的范围为青海省境内可可西里—通天河以南,唐古拉山以北地区,该范围与“三江褶皱系”(中国地质科学院,1976)的北段及“唐古拉褶皱系”(同上)的东端所占地域大体相当,也是人们所关注的一个古板块汇聚带所在之处(李春昱等1980)。作为青藏高原的重要组成部分之一,它的地质构造特征与演化历史必然反映了整个青藏高原的一个侧面。本文根据已有的实际资料和作者在该区野外工作的体会,对该区的地史发展,构造特征,岩浆活动等问题从大陆增生的角度作一初步探讨。
The range discussed in this paper is in the area south of Hoh Xil-Tongtian River and north of the Tanggula Mountain in Qinghai Province. This range is similar to the northern segment of the “Sanjiang Fold System” (Chinese Academy of Geological Sciences, 1976) and the “Tanggula Fold System” (Ibid.) Is roughly the same as the eastern part of the area, and it is also where an old plate convergence zone where people are concerned (Li Chunyu 1980). As one of the important components of the Qinghai-Tibet Plateau, its geological tectonic characteristics and evolution history inevitably reflect one aspect of the entire Qinghai-Tibet Plateau. Based on the existing actual data and author’s experience in field work in this area, this paper makes a preliminary study on the development of geography, tectonic features and magmatism in the area from the perspective of the mainland.