北天山中、新生代隆升和剥蚀史研究  

Meso-Cenozoic Uplift and Exhumation History in the North Tianshan Mountains

作　　者：姚志刚[1,2] 周立发[1] 高璞[2] 高珊[2] 佘刚[2] 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [2]西安石油大学油气资源学院,陕西西安710065

出　　处：《中国矿业大学学报》2010年第1期121-126,共6页Journal of China University of Mining & Technology

基　　金：中国博士后基金项目(20070420214);国家重点基础发展研究计划(973)项目(2003CB214601)

摘　　要：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.To determine the uplift and exhumation history of the north Tianshan mountains, six samples from granite, orthophyre and mylonization granite were collected in the piedmont belt of Yilinhebilgen mountain. The analysis results for the apatite fission tracks of the samples show that the fission track central ages presented range from （125±10） Ma to （51±4） Ma. The thermal-simulation results on the date of apatite fission show that the 2 episodic rapid cooling events were happened, including early Cretaceous and Miocene to the present which the uplift is different from the east and the west sectors of Yilinhebilgen mountain. The tectonic activity in the north Tianshan from Cretaceous is related to extensional tectonics resulted from the multiphase collapse of the southern margin in Asia. The different uplift of Meso-Cenozoic is possibly attributed to the diversity activity and thermal-rheological structures.

关 键 词：磷灰石 裂变径迹 隆升-剥蚀史 中 新生代 北天山 

分 类 号：TE111.2[石油与天然气工程—油气勘探]