吐哈盆地南缘彩霞山东石英闪长岩岩株锆石SHRIMP U-Pb测年  

Zircon SHRIMP U-Pb dating of the east Caixiashan quartz diorite stock, south margin of the Tulufan-Hami basin, East Tianshan, Xinjiang, China

作　　者：任燕 郭宏 涂其军[3] 冯新昌 李少贞 李嵩龄 

机构地区：[1]新疆地勘局第一区域地质调查大队,新疆乌鲁木齐830011 [2]新疆国家"305"项目办公室,新疆乌鲁木齐830000 [3]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《地质通报》2006年第8期941-944,共4页Geological Bulletin of China

基　　金：1:25万(K46C002002)区域地质调查项目(No.200113000060)部分成果。

摘　　要：彩霞山东石英闪长岩岩株的锆石SHRIMPU-Pb年龄为267.8Ma±1.6Ma,结合克孜尔塔格岩体的同位素年龄综合分析,此年龄值介于王瑜等所研究剪切作用控制的克孜尔塔格岩体右行剪切年龄276～254Ma之间,表明该石英闪长岩岩株的侵位年龄比克孜尔塔格复式岩体晚,为中二叠世早期。Zircon SHRIMP U-Pb dating of the east Caixiashan quartz diorite stock, East Tianshan, yielded an age of 267.8± 1.6 Ma. An integrated analysis of this age and isotope age of the Kizil Tag intrusion shows that this age falls between the dextral shear ages of 276 and 254 Ma of the Kizil Tag intrusion controlled by shearing as studied by Wang Yu et al., indicaring that the emplacement age of the quartz diorite intrusion should be later than that of the Kizil Tag composite intrusion, being early Middle Permian.

关 键 词：东天山 石英闪长岩岩株 锆石SHRIMP U-PB年龄 

分 类 号：P588.122[天文地球—岩石学] P597.3[天文地球—地质学]