准噶尔盆地北部燕山期构造热事件的裂变径迹年龄纪录  

Fission Track Age of Yanshanian Tectonic-Thermal Events in the Northern Junggar Basin

作　　者：李振华[1] 陈刚[2,3] 崔建斌[1] 陈占军[1] 何姜毅[1] 丁超[2,3] 杨甫[2,3] 

机构地区：[1]陇东学院能源工程学院,甘肃庆阳745000 [2]西北大学大陆动力学国家重点实验室,西安710069 [3]西北大学地质学系,西安710069

出　　处：《地质科技情报》2014年第2期9-14,共6页Geological Science and Technology Information

基　　金：教育部高校博士点专项科研基金项目(20116101110006)

摘　　要：运用裂变径迹（FT）分析的构造热年代学研究方法，系统建立了准噶尔盆地北缘燕山期构造热事件的FT年龄分布与峰值年龄事件。研究表明，锆石裂变径迹（ZFT）年龄主要分布在200-120Ma的燕山期，且峰值年龄集中分布在约160Ma；磷灰石裂变径迹（AFT）年龄主要分布在130－60Ma的燕山中晚期，且峰值年龄主要分布在约130Ma和90Ma。裂变径迹峰值年龄的确定不仅从定量热年代学角度为盆地构造热演化提供了可靠的证据，同时也表明了燕山运动在中国西部具有响应，为一区域构造运动事件。Fission track （FT） method was applied to establish systematically the FT age distribution and the peak ages of Yanshanian tectonic-thermal events in the northern Junggar Basin. Results show that zir- con fission track （ZFT） age is mainly distributed in 200-120 Ma of Yanshanian and the peak age is about 160 Ma, while apatite fission track （AFT） age is mainly distributed in 130-60 Ma of Late Yanshanian, and the peak age is mainly about 130 Ma and 90 Ma. The data on fission track age not only provides relia- ble thermal geochronology evidence for basin tectonic thermal evolution, but also proves that Yanshan tec- tonic movement has a response in the west of China as a regional geological event

关 键 词：准噶尔盆地北缘 燕山期 裂变径迹 峰值年龄 

分 类 号：P597.3[天文地球—地球化学]