论文部分内容阅读
为确定北天山的隆升和剥蚀的历史,对在伊林哈比尔尕山(简称伊山)山前带采集的6件花岗岩、正长斑岩和糜棱岩化花岗岩样品,进行了磷灰石裂变径迹测试.测年结果表明,径迹中值年龄变化于(125±10)Ma～(51±4)Ma之间,记录了构造隆升活动的时间.热史模拟结果表明:北天山中、新生代至少经历了2次明显的隆升事件,分别是早白垩世和中新世以来,且东、西段的抬升存在差异.白垩纪以来的北天山变形作用与亚洲南缘多期的地体碰撞增生有关,东、西段隆升在时空上的分异性可能与区域深部特定条件下的差异性活动和热-流变学性质的差异性有关.
In order to determine the history of uplift and erosion in the northern Tianshan Mountains, six samples of granite, orthorhombic and mylonitized granite collected in the foreland belt of Mt. Fission track test.The dating results show that the median age of the track varies from (125 ± 10) Ma to (51 ± 4) Ma, and the time of tectonic uplift activity is recorded.The thermal history simulation results show that the northern Tianshan Mesozoic and Cenozoic at least experienced two obvious uplift events, respectively, since the Early Cretaceous and the Miocene, and the eastern and western uplifts there is a difference between the Cretaceous since the deformation of the North Tianshan Mountains and the southern margin of Asia Of the terrestrial collision and hyperplasia. The temporal and spatial heterogeneity of the uplift of the east and west segments may be related to the differences in the specific activities and thermo-rheological properties under certain conditions in the deep region.