Study on Tectonic Evolution of Junggar Basin
Study on Tectonic Evolution of Junggar Basin
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发表时间：
2002
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通讯作者：
Guo-qing Zhang
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作者：
Guo-qing Zhang
准噶尔盆地是中国最大的含油气盆地之一。准噶尔盆地位于西伯利亚板块南翼阿尔泰造山带、哈萨克斯坦板块和天山褶皱带之间。它是一个晚古生代、中生代和新生代挤压叠加盆地，经历了海西运动、印支运动、燕山运动和喜马拉雅运动的影响，形成了复杂的构造格局。准噶尔盆地是在准噶尔地体的基础上发展起来的。该地区为前寒武纪结晶基底，形成时间至少在800 Ma以前。它由“双重基底、四层结构”组成。盆地局部地区地壳减薄。因此，进化福尔斯分为两个阶段。e.第一阶段为准噶尔盆地的演化，第二阶段为盆地的演化。在整个下古生界，古生界处于古生界的稳定演化过程中。准噶尔盆地的形成经历了三个阶段：（1）地壳演化阶段;（2）洋壳消耗阶段;（3）地体与板块的增生拼贴阶段。根据构造层次和盆地研究进展，准噶尔盆地的形成演化可划分为6个阶段：（1）地形形成阶段;（2）地形演化阶段;（3）地形与板块拼贴及胚体形成阶段;（4）前陆盆地阶段;（5）陆内坳陷阶段;（6）再生前陆盆地。后三个阶段与油气成藏有关。
Junggar Basin is one of the biggest oil and gas bearing basins in China. Junggar Basin lies among the Altaiorogen on south flank of Siberia plate, the Kazakstan plate and the Tianshan fold belt. It is a Late Paleozoic, Mesozoic, and Cenozoic compressional superimposed basin, experienced the effects Hercynian orogeny, indosinian, Yanshannian and Himalayan orogenisms and was rsulted in a complex tectonic frame work. Junggar Basin developed on the basis of Junggar terrain. The terrain consists of Precambrin crystal basement which was formed before 800Ma at least. It consists of "dual basement and four-layers structure". The crust thinning took place in some parts of the basin. So, the evolution falls into two stages i. e. the first stage, the evolution of the Junggar terrane and the second stage, the evolution of the basin. During the whole Lower Paleozoic, the terrane was in the stable evolution of the terrane. The terrain passed through three stages and came into being the Junggar Basin: (1) the terrane evolution; (2) the oceanic crust comsumption; (3) the accretion and collage of the terrain and the plates. Based on the structure-layers and the progress of the basin research, the formation and evolution of the J unggar Basin has divided into six stages: (1) the formation of the terrain; (2) the evolution of the terrain; (3) the collage of the terrain and the plates and the formation of the enbryonic; (4) foreland basin stage; (5) the intacontinental depression stage; (6) the regeneration foreland basin. The latter three stages are related to the accumulation of petroloum and nature gas.