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| 云南个旧锡矿田碱性岩和煌斑岩LA-ICP-MS锆石U-Pb测年及其地质意义 | |
| 引用本文： | 程彦博,毛景文,陈懋弘,杨宗喜,冯佳睿,赵海杰.云南个旧锡矿田碱性岩和煌斑岩LA-ICP-MS锆石U-Pb测年及其地质意义[J].中国地质,2008,35(6). |
| 作者姓名： | 程彦博 毛景文 陈懋弘 杨宗喜 冯佳睿 赵海杰 |
| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083 2. 中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京,100037 3. 中国地质大学地球科学与资源学院,北京,100083;中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京,100037 |
| 基金项目： | 国家重点基础研究发展规划(973计划)，中国地质调查局地质大调查项目，斯伦贝谢科技研究计划项目 |
| 摘 要： | 笔者报道了运用LA-ICP-MS锆石U-Pb方法对云南个旧地区碱性岩侵入年龄和煌斑岩的测年结果,即白云山碱性岩的形成时代为76.6±3.6Ma.煌斑岩的形成时代为77.2±2.4 Ma,这两种类型的岩石均为燕山晚期岩浆作用的产物.结合区域地质地球物理资料、岩石学组合的构造指示意义及前人的有关其他研究成果,认为这些岩石形成于岩石圈伸展的动力学环境. |
| 关 键 词： | 碱性岩 煌斑岩 动力学背景 个旧 云南 |
LA-ICP-MS zircon dating of the alkaline rocks and lamprophyres in Gejiu area and its implications |
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| CHENG Yan-bo,MAO Jing-wen,CHEN Mao-hong,YANG Zong-xi,FENG Jia-rui,ZHAO Hai-jie.LA-ICP-MS zircon dating of the alkaline rocks and lamprophyres in Gejiu area and its implications[J].Chinese Geology,2008,35(6). | |
| Authors: | CHENG Yan-bo MAO Jing-wen CHEN Mao-hong YANG Zong-xi FENG Jia-rui ZHAO Hai-jie |
| Institution: | 1.School of the Earth Sciences and Resources;China University of Geosciences;Beijing 100083;China;2.MLR Laboratory of Metallogeny and Mineral Assessment;Institute of Mineral Resources;Chinese Academy of Geological Sciences;Beijing 100037;China |
| Abstract: | This paper report the LA-ICP-MS zircon U-Pb age data of the alkaline rocks and lamprophyres in the Gejiu tin district,Yunnan Province.Combined with the character of local geology and geophysical of this area,authors try to discuss the geodynamic setting of western Cathaysia block during Late Yanshan epoch.The dating data shows the alkaline rocks formed at 79.9 Ma and the age of lamprophyre is 82.0 Ma,both of which emplaced during late Yanshanian epoch.Based on the previous geophysical profile,tectonic evolu... |
| Keywords: | LA-ICP-MS |
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