| 星子牛屎墩韧性剪切带的特征及其意义 |
| |
| 引用本文： | 杨帆,宋传中,任升莲,李加好,韩建军,刘国厅.星子牛屎墩韧性剪切带的特征及其意义[J].地质科学,2016,0(3):732-747. |
| |
| 作者姓名： | 杨帆 宋传中 任升莲 李加好 韩建军 刘国厅 |
| |
| 作者单位： | 合肥工业大学资源与环境工程学院 合肥 230009 |
| |
| 摘 要： | 出露于鄱阳湖小岛的星子牛屎墩剪切带是一条小型的、北北东向延伸的走滑韧性剪切带，野外和显微镜下的观察和分析表明其为左行剪切。镜下石英和长石的显微构造特征及二长石温度计计算获得剪切带的变形温度为504℃～530℃。锆石U-Pb年龄测试得到剪切带的走滑活动时代为中侏罗世，属于太平洋构造域，推测与郯庐断裂带为同期的构造产物， 是郯庐断裂系的一部分，代表中生代深部基底的走滑活动特征，而该基底韧性剪切带出露地表是受庐山变质核杂岩隆升作用的结果。
|
| 关 键 词： | 牛屎墩韧性剪切带 运动学特征 二长石温度计 U-Pb年代学 郯庐断裂系 变质核杂岩 |
| 收稿时间： | 2015-05-07 |
| 修稿时间： | 2015-05-07; |
The characteristic and significance of Niushidun ductile shear zone in Xingzi |
| |
| Yang Fan,Song Chuanzhong,Ren Shenglian,Li Jiahao,Han Jianjun,Liu Guoting.The characteristic and significance of Niushidun ductile shear zone in Xingzi[J].Chinese Journal of Geology,2016,0(3):732-747. |
| |
| Authors: | Yang Fan Song Chuanzhong Ren Shenglian Li Jiahao Han Jianjun Liu Guoting |
| |
| Institution: | School of Resources and Environmental Engineering， Hefei University of Technology， Hefei 230009 |
| |
| Abstract: | Niushidun ductile shear zone is exposed on a island of Poyang Lake in Xingzi. It is a small ductile shear zone trending in NNE. Observation in the field and analysis under the microscope proved it sinistral shearing. The deformation temperature of Niushidun ductile shear zone is 504℃～530℃ according to microscopic structural characteristics of quartz and feldspar and two feldspar thermometer. The strike—slip age of this ductile shear zone tested by zircon U—Pb dating is Middle Jurassic and it belong to Pacific tectonic domain. Niushidun ductile shear which show the strike—slip characteristic of deep basement in the Mesozoic is a part of the Tanlu fault system and they deform at the same period. And the uplift of the Lushan metamorphic core complex lead to it exposed on the surface of the earth. |
| |
| Keywords: | Niushidun ductile shear zone Kinematic characteristic Two feldspar thermometer U-Pb geochronology Tanlu fault system Metamorphic core complex |
|
| 点击此处可从《地质科学》浏览原始摘要信息 |
| 点击此处可从《地质科学》下载免费的PDF全文 |
