中国和哈萨克斯坦阿尔泰大地构造及地壳演化

TECTONICS AND CRUSTAL EVOLUTION OF ALTAI IN CHINA AND KAZAKHSTAN

中国和哈萨克斯坦阿尔泰位于西伯利亚板块西南边缘，阿尔泰褶皱系与斋桑—北准噶尔褶皱系的接合部位，分为霍尔宗—丘伊—哈纳斯、冲乎尔—青河、别洛乌巴—南阿尔泰、矿区阿尔泰和东卡尔巴—富蕴、二台6个构造建造带，14个构造建造亚带。区内地壳演化可分为太古宙—元古宙古陆壳形成阶段、早古生代被动陆缘陆壳增生阶段、晚古生代陆壳拉张破坏和挤压重建(增生)阶段及中—新生代相对稳定的大陆发展阶段。

Altai in China and Kazakhstan is located at the southwestern margin of Siberia plate, where Altai fold system and Zhaisang-North Jungger fold system join together. The tectonic units are divided as follows, the 1st grade units for fold region, the sub-1st grade units for fold system, the 2nd grade units for tectono-formation belt which roughly corresponds with fold belt, central uplift belt or central crystalline belt or simply-called belt. The 3rd grade units roughly correspond with anticlinoria, synclinoria, combination of above two, and faulted blocks. These are simlpy called sub-belts. Four tectono-formation sub-belts are divided in the area. The tectonic framework of the area formed through repeated extensions and compressions. Four key stages are divided, i.e., Archean-Proterozoic formation of paleo-continental crust, Early Paleozoic accretion of passive continental margin, Late Paleozoic extension-compression of continental crust, and Meso-Cenozoic relatively stable development.