中文摘要：

为了解天山中新生代再造山过程的历史演化，沿横穿天山的乌鲁木齐—库尔勒公路采集了沉积岩、变质岩、花岗岩等7个样品，用作天山山体隆升和热历史演化研究．通过对样品中磷灰石裂变径迹的测年，获得7个样品的裂变径迹中心年龄，范围为（78．0±4．5）～（31．8±2．5）Ma；继之，在计算机上对磷灰石裂变径迹测定数据进行了热历史模拟，获得了隆升-冷却演化过程的新认识．裂变径迹的年龄数据和热模拟结果表明：天山造山带的中、新生代造山活动并非是整体统—抬升的过程．表现为中新世之前山体北侧先隆升、南侧后隆升的演化规律，山体隆升从北向南逐渐推进．到中新世晚期，才表现为整体抬升过程．通过磷灰石-锆石矿物对计算以及热模拟的结果，获得了各隆升阶段的视隆升速率，发现自晚白垩世晚期以来，视隆升速率有逐渐增加的趋势。

英文摘要：

In order to better understand the mountain-building process of the Tianshan Belt, the authors collected 7 samples of sedimentary rock, metamorphic rock and granite along Urumqi-Koda highway across the Tianshan orogenic belt, for the purpose of studying the uplift of the Tianshan Mountain and its thermal evolution history. By studying the apatite fission track of the samples, we acquired seven groups of fission track central ages which range from 78.0±4.5Ma to 31.8±2.5Ma. We also took thermal-simulation on the data of apatite fission track and obtained some new comprehensive insights. Our fission track dating and results indicate that Mesozoic and Cenozoic orogeny of the Tianshan orogenic belt was not an integral unified uplifting process. Instead it appears that uplifting In-st commenced in the north and then gradually immigrated to the south before the Miocene. After the late Miocene, the Tianshan orogeny uplifted integrally. Calculations of the apatite-zircon mineral pair and results of thermal-simulation give the apparent uplift rate of each uplifting phase. The apparent uplift rate has generally increased since the late Cretaceous.