克拉美丽山南缘西段盆山耦合机制  

Basin-mountain coupling model of the southern margin of the weastern part of the Karamaili Mountains

作　　者：易泽军[1] 李涤[1] 连奕驰 

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《地质科学》2018年第1期169-184,共16页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国地质调查局地质调查工作项目“准东一三塘湖一吐哈地区油气资源选区调查”（编号：1211302108019.1）资助.本文在撰写过程中得到了何登发导师的细心指导,再此表示衷心感谢!真挚的感谢新疆油田唐勇、孔玉华、郑孟林、吴海生等高工在研究过程中给予的支持,感谢评审专家的审稿!

摘　　要：克拉美丽山位于准噶尔盆地东部，晚古生代克拉美丽洋盆向北俯冲消亡，西伯利亚板块与准噶尔地块在该地区发生碰撞造山。目前，就石炭纪之后克拉美丽山的构造活动存在持续挤压、拉分、伸展、挤压-伸展转换多种观点，构造样式也各不相同。本文应用断层相关褶皱理论，从盆山过渡带现今构造样式人手来探讨克拉美丽山南缘西段盆山耦合机制。研究结果表明，克拉美丽山西段在石炭纪之后经历了中二叠世早期、早三叠世早期、晚三叠世末期、晚侏罗世-早白垩世、晚白垩世早期和古新世末期6次构造隆升。前4期相对稳定沉积，晚白垩世早期，晚古生代地层沿着下二叠统底部的泥岩层滑脱面以叠瓦状构造楔样式向南楔人，构造缩短量大于15km，现今盆山构造样式初步形成。始新世构造楔遭受后期突破断层改造。始新世后，克拉美丽山大规模的构造活动基本停止，地层遭受剥蚀最终形成现今地质结构。The Karamaili Mountains are located in the eastern part of Junggar Basin. Late Paleozoic Karamaili ocean subducted to the north and the Siberian plate collides with Junggar plot in this area. At present, there are many views on the tectonic activity of the Karamaili Mountains after the Carboniferous period, such as continuous extrusion, sliding, stretching, extrusion-stretch conversion, and their tectonic styles are also different. In this paper, we pay a lot of attention to the tectonic styles and study them applying theories of fault-related fold to explore the mountain- basin coupling mechanism of the southern margin of the Karamaili Mountains. The results show that the Karamaili Mountains experienced 6 tectonic uplifting activities after the Carboniferous period, such as Middle Permian, Early Triassic, Late Triassic, Late Jurassic-Early Cretaceous, Late Cretaceous and Late Paleocene. The first four periods were dominated by differential uplift. In the Early Cretaceous period, the formation of the Paleozoic strata along decollement, the bottom of the Lower Permian strata, wedged into the south, and the reduction was more than 15 km. After a long time denudation, the wedges were destroyed by break-through fault behind in the Eocene. Since the beginning of the Oligocene, large-scale tectonic activities have occurred no longer in the Karamaili Mountains. After a long time denudation to now, the present geological structure is formed finally.

关 键 词：克拉美丽山 盆山耦合机制 构造楔 突破断层 构造演化 

分 类 号：P542[天文地球—构造地质学]