| 中天山早泥盆世陆弧：来自花岗质糜棱岩地球化学及SHRIMP-U／Pb定年的证据 |
| |
| 引用本文： | 杨天南,李锦轶,孙桂华,王彦斌.中天山早泥盆世陆弧：来自花岗质糜棱岩地球化学及SHRIMP-U／Pb定年的证据[J].岩石学报,2006,22(1):41-48. |
| |
| 作者姓名： | 杨天南 李锦轶 孙桂华 王彦斌 |
| |
| 作者单位： | 中国地质科学院地质研究所,北京,100037 |
| |
| 摘 要： | 中天山巴伦台以北地区出露一套糜棱岩化的中-酸性侵入岩，元素地球化学特点表明其属于火山弧环境；锆石SHRIMP U／Pb法测试结果揭示其侵位年龄在405—416Ma间，属早泥盆世。这一研究结果显示，早在晚志留世晚期，南天山洋已开始向北俯冲，并在中天山地块南缘形成火山弧环境。至早泥盆世晚期，塔里木陆块与中天山火山弧发生碰撞。
|
| 关 键 词： | 糜棱岩化花岗岩 地球化学 SHRIMP锆石U-Pb年龄 中天山 |
| 文章编号： | 1000-0569/2006/022(01)-0041-48 |
| 收稿时间： | 11 11 2005 12:00AM |
| 修稿时间： | 12 5 2005 12:00AM |
Earlier Devonian active continental arc in Central Tianshan:evidence of geochemical analyses and Zircon SHRIMP dating on mylonitized granitic rock. |
| |
| YANG TianNan,LI JinYi,SUN GuiHu,WANG YanBin.Earlier Devonian active continental arc in Central Tianshan:evidence of geochemical analyses and Zircon SHRIMP dating on mylonitized granitic rock.[J].Acta Petrologica Sinica,2006,22(1):41-48. |
| |
| Authors: | YANG TianNan LI JinYi SUN GuiHu WANG YanBin |
| |
| Institution: | Institute of Geology, Chinese Academy of Geological Science, Beijing 100037, China |
| |
| Abstract: | Mylonitized dioritic-granitic plutons occurred in north of Baluntai area,central Tianshan,Northwest China.Element geochemical data reveal that the dioritic-granitic plutons were generated at active continental arc environment like today's Chile;zircon U/Pb SHRIMP dating and CL imaging indicat that the active continental volcano arc developed at 405 -416 Ma.These data demonstrat that the paleo-south Tianshan ocean crust started northward subducting under the central Tianshan block at earlier Devonian,resulting in a continental arc upon the overriding plate.The following collision between the central Tianshan block and the Tarim block might begin at later of Earlier Devonian. |
| |
| Keywords: | Mylonitized dioritic-granitic pluton geochemistry zircon U/Pb SHRIMP dating central Tianshan |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩石学报》浏览原始摘要信息 |
| 点击此处可从《岩石学报》下载免费的PDF全文 |
