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东昆仑西段巴音郭勒地区花岗岩类样品的磷灰石裂变径迹年龄变化于120-47 Ma,具体可分为120-100Ma、67 Ma和54-47 Ma三组。这些年龄很好地揭示了区内所经历的相关构造活动,其中年龄120-100 Ma和67 Ma是冈底斯地体和喜马拉雅地体先后于早白垩世和晚白垩世时期-分别向北俯冲并与其北侧地块相互碰撞-汇聚-拼合的体现;而年龄54-47 Ma与始新世区内造山后伸展事件有关。磷灰石裂变径迹模拟结果显示,研究区具有180-140Ma、140-13Ma和13-0Ma三阶段构造热演化历史,分别隆升约1.0 km、0.6 km和1.4 km,其中第三阶段是快速隆升期,冷却温度为50℃,三阶段累计隆升幅度为3.0 km。同时,根据公式计算获得3个样品的岩石隆升量分别为3 620 m、3 320 m和3 770 m,平均值为3 570 m,与三阶段算法所得结果相符。
The apatite fission track age of the Bayinguole region in the eastern Kunlun area varies from 120 to 47 Ma, and can be divided into three groups of 120-100 Ma, 67 Ma and 54-47 Ma. These ages have well revealed the tectonic activities experienced in the area. The ages of 120-100 Ma and 67 Ma were from the Early Cretaceous and the Late Himalayan terranes of the Early Cretaceous and the Late Cretaceous, respectively subducting northward And collide with the north side of the block - convergence - a combination of performance; and age 54-47 Ma and Eocene after orogenic extension events. The results of apatite fission track simulation show that the study area has three-phase tectonothermal evolution history of 180-140Ma, 140-13Ma and 13-0Ma, respectively uplifting about 1.0 km, 0.6 km and 1.4 km, of which the third stage is fast Uplift period, the cooling temperature is 50 ℃, three-stage cumulative uplift of 3.0 km. At the same time, the amount of rock uplift calculated by the formula is 3 620 m, 3 320 m and 3 770 m, respectively, with an average of 3 570 m, which is in good agreement with the results obtained by the three-stage algorithm.