|
|||||
|
|
| 西昆仑新藏公路118～323km段基性、酸性岩脉K—Ar年龄 | |
| 引用本文： | 计文化,周辉,李亚民.西昆仑新藏公路118～323km段基性、酸性岩脉K—Ar年龄[J].地质通报,2005,24(3):243-245. |
| 作者姓名： | 计文化 周辉 李亚民 |
| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083;陕西省地质调查院,陕西,咸阳,712000 2. 北京大学地球与空间科学学院,北京,100871 3. 中国地质大学水资源与环境学院,北京,100083 |
| 基金项目： | 国家自然科学基金项目(49902020)，中国地质调查局1∶25万区域地质调查项目(基2002001-18)资助。 |
| 摘 要： | 在西昆仑西段新藏公路沿线广泛发育数量众多的岩脉，野外出露有煌斑岩脉、辉绿岩脉、闪长岩脉、花岗岩脉。对以上岩脉进行了全岩K-Ar同位素测年，其侵位年龄与该区的地质构造事件有很好的对应关系：辉绿岩脉273～280Ma的侵位年龄对应着弧后扩张的时间，闪长岩脉和花岗岩脉230～244Ma的侵位年龄对应着碰撞造山的时间。 |
| 关 键 词： | 西昆仑 岩脉 K-Ar同位素测年 |
| 文章编号： | 1671-2552(2005)03-0243-03 |
| 修稿时间： | 2003年12月19 |
K-Ar ages of basic-acid dikes of the 118-323 km section of the Xinjiang-Tibet Highway in the West Kunlun |
|
| JI Wenhu,ZHOU Hui,LI Yamina College of Earth Sciences and Land Resources,China University of Geosciences,Beijing,Chin,College of Earth and Spatial Science,Peking University,Beijing,Chin,Shaanxi Institute of Geological Survey,Xianyang,Shaanxi,Chin,College of Water Resources and Environment,China University of Geosciences,Beijing,China.K-Ar ages of basic-acid dikes of the 118-323 km section of the Xinjiang-Tibet Highway in the West Kunlun[J].Geologcal Bulletin OF China,2005,24(3):243-245. | |
| Authors: | JI Wenhu ZHOU Hui LI Yamina College of Earth Sciences and Land Resources China University of Geosciences Beijing Chin College of Earth and Spatial Science Peking University Beijing Chin Shaanxi Institute of Geological Survey Xianyang Shaanxi Chin College of Water Resources and Environment China University of Geosciences Beijing China |
| Abstract: | Many dikes occur along the Xinjiang-Tibet Highway in the western segment of the West Kunlun. Those exposed in the field are lamprophyre, diabase, diorite and granite dikes. Whole-rock K-Ar dating of these dikes indicates that their emplacement ages may well correspond with tectonic events in the study area. The 273-280 Ma age of emplacement of diabase dikes corresponds with the timing of back-arc spreading and the 230-244 Ma age of emplacement of diorite and granite dikes corresponds with the timing of collisional orogeny. |
| Keywords: | West Kunlun dike K-Ar dating |
| 本文献已被 CNKI 维普 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 | |