一、前言本文讨论的范围东起景泰,西至玉门、敦煌的狭长地带。此区除敦煌一段为东西向展布外,其余均呈北西西向延伸,共包括三个地质构造分区:北面为阿拉善台隆;中间为狭义的走廊过渡带;南面为北祁连加里东褶皱带(图1)。在地质发展史上,本区是由新(北祁连 I. Preface This article discusses the scope of Jingtai East, west of Yumen, Dunhuang narrow strip. Except for Dunhuang section east-west distribution, the rest of the section extends from northwest to west, including a total of three geological tectonic zoning: Alashan Silicone on the north, a narrow corridor transitional zone in the middle and a northern Qilian Caledonian fold on the south Belt (Figure 1). In the history of geological development, the district is new (North Qilian