| 内蒙古苏尼特左旗地区阿木乌岩体LA-ICP-MS锆石U-Pb年龄及其地球化学特征 |
| |
| 引用本文： | 郭支涛,;孙加鹏,;梁一鸿,;邹存铭,;孙晓,;周静,;于泓超,;赵东明.内蒙古苏尼特左旗地区阿木乌岩体LA-ICP-MS锆石U-Pb年龄及其地球化学特征[J].世界地质,2014,33(2):311-321. |
| |
| 作者姓名： | 郭支涛 ;孙加鹏 ;梁一鸿 ;邹存铭 ;孙晓 ;周静 ;于泓超 ;赵东明 |
| |
| 作者单位： | 1. 吉林大学 地球科学学院，长春 130061; 2. 吉林天池矿业股份有限公司，吉林 和龙 133500 |
| |
| 基金项目： | 中国地质凋查局项目（1212011120329）. |
| |
| 摘 要： | 对苏尼特左旗地区阿木乌岩体进行LA-ICP-MS锆石U-Pb测年、主量元素、稀土元素和微量元素测试分析。结果表明,岩体成岩年龄为235.1±3.2 Ma,属中三叠世。岩体具有高SiO2、富K2O、低CaO、低TiO2的特征。强烈亏损Sr、Ba、Ti、P等元素,富集K、Rb、Th等亲石元素,具有右倾"海鸥型"球粒陨石标准化稀土配分型式及强烈的负铕异常等特点。A/CNK=0.77～1.19,A/NK=1.26～1.64,表明阿木乌岩体具有偏铝质A型花岗岩的特征。具有较高的Y/Nb值(2.31～3.001.2),显示出A2型花岗岩的特征,说明岩体形成于造山后的伸展环境。
|
| 关 键 词： | 阿木乌岩体 苏尼特左旗 A 型花岗岩 锆石 U--Pb 定年 岩石地球化学 内蒙古 |
LA-ICP-MS zircon U-Pb ages and geochemical characteristics of Amuwu pluton in Sonid Zuoqi area,Inner Mongolia |
| |
| GUO Zhi-Tao,SUN Jia-Peng,LIANG Yi-Hong,ZOU Cun-Ming,SUN Xiao,ZHOU Jing,YU Hong-Chao,ZHAO Dong-Ming.LA-ICP-MS zircon U-Pb ages and geochemical characteristics of Amuwu pluton in Sonid Zuoqi area,Inner Mongolia[J].World Geology,2014,33(2):311-321. |
| |
| Authors: | GUO Zhi-Tao SUN Jia-Peng LIANG Yi-Hong ZOU Cun-Ming SUN Xiao ZHOU Jing YU Hong-Chao ZHAO Dong-Ming |
| |
| Institution: | 1. College of Earth Sciences，Jilin University，Changchun 130061，China; 2. Jilin Tianchi Mining Industry Company，Ltd. ，Helong 133500，Jilin，China |
| |
| Abstract: | The zircon U-Pb ages and geochemical characteristics of Amuwu pluton in Sonid Zuoqi area were determined by the method of LA-ICP-MS zircon U-Pb dating as well as major,trace and REE elements analysis.The results showed that the 206pb/238U age was 235.1 ±3.2 Ma,formed in Middle Triassic.The granite was characterized by high SiO2 and K2O,low CaO and TiO2,strongly depleted in Sr,Ba,Ti,P,and enriched in K,Rb,Th.The pluton showed particularly intensive Eu negative anomalies and with a seagull shape to rightward in chondrite-normalized REE pattern.The A/CNK and A/NK values were 0.77 ～ 1.193 and 1.26 ～ 1.64,respectively,belonging to A-type granite.According to the high Y/Nb value （2.31 ～3.00 ＞ 1.2）,the pluton shows the characteristics of granite type A2,which formed in the extensional environment of post-orogenic. |
| |
| Keywords: | Amuwu pluton Sonid Zuoqi A-type granite zircon U-Pb ages geochemistry Inner Mongolia |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《世界地质》浏览原始摘要信息 |
| 点击此处可从《世界地质》下载免费的PDF全文 |
|
