新疆所有古生代造山带都是在前寒武纪基底陆壳解体的基础上发展起来的陆间型造山带。其古生代地壳发展都经历了拉张型过渡壳—洋壳—汇聚型过渡壳—新陆壳的过程。通过对各阶段建造和构造变形的分析,基本搞清了新疆各造山带地壳演化的历史。 新疆各构造带开始由陆壳解体进入拉张阶段的时期,最早自元古宙末(北阿尔泰),最晚自石炭纪初(伊犁、觉洛塔格)。拉张阶段的主要构造环境有岩浆型被动陆缘和非岩浆型被动陆缘两类。前者如南阿尔泰、北准噶尔、依连哈比尔尕、觉洛塔格、祁曼塔格;后者如北阿尔泰、西准噶尔、南天山、东昆仑的喀喇米兰和木孜塔格、喀喇昆仑的阿克赛钦、林济塘等造山带。前者发育典型的双峰式火山岩建造,后者发育大西洋型巨厚的陆源碎屑岩建造。拉张阶段延续的时间一般长于汇聚阶段。所以,在新缰各古生代造山带的地壳发展历史中,拉张阶段是一个独立的、重要的发展阶段。岩浆型被动陆缘是地质发展历史 All of the Paleozoic orogenic belts in Xinjiang are continental land orogenic belts developed on the basis of the Precambrian basement continental crust disintegration. The Paleozoic crustal development has experienced the process of stretching transitional crust-oceanic crust-convergent transitional crust-new continental crust. Through the analysis of the various stages of construction and tectonic deformation, the history of crustal evolution in each orogenic belt of Xinjiang is basically ascertained. The tectonic belts in Xinjiang started their period from the collapse of the continental crust to the extensional stage. The earliest since the end of the Proterozoic (North Altai), at the latest since the beginning of the Carboniferous (Ili, Constellation). The main tectonic setting in the pull stage is the magmatic passive continental margin and the non-magmatic passive continental margin. The former is the southern Altai, the northern Junggar, according to Habir Ga time, feel Lottag, Qi Mantag grid; the latter such as the North Altai, West Junggar, South Tianshan, Eastern Kunlun Camelot and Muztagata, Kara Kunlun Aksai Qin, Lin Jitang and other orogenic belt. The former developed a typical bimodal volcanic rock, the latter developed a huge Atlantic terrigenous clastic rock construction. Extension of the stretch phase generally longer than the convergence phase. Therefore, in the history of the crustal development of the Paleozoic orogenic belts in the new rein, the expansion phase is an independent and important stage of development. Magmatic passive continental margin is the history of geological development