南天山新生代隆升和去顶作用过程

利用磷灰石裂变径迹技术并结合库车坳陷的沉积和变形特征，对南天山的隆升和去顶作用过程进行详细的研究。南天山在中新世早期就开始了现代天山形成的隆升事件，根据样品的磷灰石裂变径迹结果，其隆升年龄为17～25Ma；而且此隆升事件是一快速隆升事件，隆升速率达到138．8～198．8m/Ma。中新世南天山隆升的南部边界并不是前人所认为的北部古生代地层和南部中新生代地层之间的冲断层，而是在南部的中新生代地层中。在库车坳陷的阳霞地区，隆升的界线位于吐格尔明背斜核部的韧性剪切带。通过库车坳陷的新生代沉积和变形特征的分析，提出了天山中新世以来的隆升与库车坳陷的沉积和变形特征存在很好的耦合关系。

Cenozoic Uplifting and Unroofing of Southern Tien Shan, China

On the basis of technology of apatite fission track combining with the research of sediment and deformation in Kuqa depression, the uplifting and unroofing of southern Tien Shan are discussed in detail. The fission track age of 17 - 25 Ma from southern Tien Shan implies that the southern Tien Shan mountains were starting to be uplifted from early Miocene time. This uplifting is fast, at a ratio of 138.8- 198. 8 m/Ma. The southern uplift boundary of southern Tien Shan seems not to be the main thrust fault between Paleozoic and Mesozoic or Cenozoic rocks, but lies in Mesozoic or Cenozoic strata south of the main thrust fault. The southern uplift boundary of southern Tien Shan is ductile in core of Tugerming anticline in Kuqa depression. There exists a good coupling between the uplifting of Tien Shan and the sedimentation and deformation of Kuqa depression.