|
|||||
|
|
| 新疆东准噶尔早泥盆世早期花岗岩的确定及其地质意义 | |
| 引用本文： | 李亚萍,李锦轶,孙桂华,朱志新,宋 彪.新疆东准噶尔早泥盆世早期花岗岩的确定及其地质意义[J].地质通报,2009,28(12):1885-1893. |
| 作者姓名： | 李亚萍 李锦轶 孙桂华 朱志新 宋 彪 |
| 作者单位： | 1. 中国地质调查局发展研究中心,北京,100037;中国地质科学院地质研究所,北京,100037 2. 中国地质科学院地质研究所,北京,100037 3. 中国地质科学院地质研究所,北京,100037;国土资源部广州海洋地质调查局,广东,广州,510760 4. 中国地质科学院地质研究所,北京,100037;新疆维吾尔自治区地质调查院,新疆,乌鲁木齐,830011 5. 中国地质科学院地质研究所,北京,100037;北京离子探针中心,北京,100037 |
| 基金项目： | 国家重点基础研究规划项目，国家自然科学基金项目 |
| 摘 要： | 根据锆石SHRIMP U-Pb定年获得的（413±8）Ma（MSWD=0.73）206Pb/238U表面年龄和锆石的矿物学特征, 确定东准噶尔中部被泥盆系覆盖的白云母花岗岩的形成时代为早泥盆世早期。通过对已有的区域地质资料与该岩体岩石学特征的综合分析，推测东准噶尔中部和南部地区在早泥盆世早期处于伸展构造背景。 |
| 关 键 词： | 白云母花岗岩 锆石SHRIMP U-Pb定年 东准噶尔造山带 早泥盆世 伸展构造背景 |
Determination of the Early Devonian granite in East Junggar, Xinjiang, China and its geological implications |
|
| LI Ya-ping,LI Jin-yi,SUN Gui-hu,ZHU Zhi-xin,SONG Biao.Determination of the Early Devonian granite in East Junggar, Xinjiang, China and its geological implications[J].Geologcal Bulletin OF China,2009,28(12):1885-1893. | |
| Authors: | LI Ya-ping LI Jin-yi SUN Gui-hu ZHU Zhi-xin SONG Biao |
| Institution: | 1. Development Research Center of China Geological Survey, Beijing 100037, China;2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;3. Guangzhou Marine Geological Survey, The Ministry of Land and Resources P.R.C, Guangzhou 510760, Guangdong, China;4. Geological Research Academy of Xinjiang, Urumqi 830011, Xinjiang, China;5. Beijing SHRIMP Center, Beijing 100037, China |
| Abstract: | Based on zircon apparent ~(206)Pb/~(238)U age of (413±8)Ma (MSWD=0.73)obtained by SHRIMP U-Pb dating and CL image observation of the zircons, intrusive age of the muscovite granite (alaskite) unconformablly covered by the Devonian sedimentary sequences in the central East Junggar orogenic belt is determined as the earliest Devonian. Combining the petrological characteristics of the granite with available regional geological data, the earliest Devonian tectonic setting of the East Junggar area is supposed as being extensional. |
| Keywords: | alaskite zircon SHRIMP U-Pb dating East Junggar orogenic belt Early Devonian extensional tectonic setting |
| 本文献已被 万方数据 等数据库收录！ | |
| 点击此处可从《地质通报》浏览原始摘要信息 | |
| 点击此处可从《地质通报》下载免费的PDF全文 | |