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| 西藏洞中拉铅锌矿床石英斑岩锆石U-Pb年代学研究 | |
| 引用本文： | 崔晓亮,唐菊兴,多吉,钟康惠,高一鸣,刘鸿飞,张金树,王成辉,刘婷婷.西藏洞中拉铅锌矿床石英斑岩锆石U-Pb年代学研究[J].成都理工大学学报(自然科学版),2011,38(5):557-562. |
| 作者姓名： | 崔晓亮 唐菊兴 多吉 钟康惠 高一鸣 刘鸿飞 张金树 王成辉 刘婷婷 |
| 作者单位： | 1. 成都理工大学地球科学学院,成都610059;西藏自治区地质矿产勘查开发局,拉萨851400 2. 成都理工大学地球科学学院,成都610059;中国地质科学院矿产资源研究所,北京100037 3. 西藏自治区地质矿产勘查开发局,拉萨,851400 4. 成都理工大学地球科学学院,成都,610059 5. 中国地质科学院矿产资源研究所,北京,100037 |
| 基金项目： | 国家科技支撑项目(2006BAB01A01); 国家地质调查局项目(1212010818089) |
| 摘 要： | 探讨西藏洞中拉铅锌矿区的石英斑岩岩体归属.通过详细的地质填图,并采用LAICPMS锆石U-Pb法年龄测定技术,对石英斑岩进行年代学研究.通过石英斑岩样品中单颗粒锆石22个样品点的分析,得到其206 Pb/238U的加权平均年龄为126.9±1.1 Ma,MSWD=0.96.这一结果否认了这套岩石单元属于始新世林子宗群帕... |
| 关 键 词： | 洞中拉铅锌矿 石英斑岩 LA-ICPMS 锆石U-Pb法年龄测定 燕山晚期 |
Zircon U-Pb age of the quartz porphyry from Dongzhongla Pb-Zn deposit in Tibet,China |
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| CUI Xiao-liang,TANG Ju-xing,Dorji,ZHONG Kang-hui,GAO Yi-ming,LIU Hong-fei,ZHANG Jin-shu,WANG Cheng-hui,LIU Ting-ting.Zircon U-Pb age of the quartz porphyry from Dongzhongla Pb-Zn deposit in Tibet,China[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2011,38(5):557-562. | |
| Authors: | CUI Xiao-liang TANG Ju-xing Dorji ZHONG Kang-hui GAO Yi-ming LIU Hong-fei ZHANG Jin-shu WANG Cheng-hui LIU Ting-ting |
| Institution: | CUI Xiao-liang1,2,TANG Ju-xing1,3,Dorji2,ZHONG Kang-hui1,GAO Yi-ming3,LIU Hong-fei2,ZHANG Jin-shu2,WANG Cheng-hui3,LIU Ting-ting1 1.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China,2.Tibet Bureau of Geology and Mineral Exploration and Development,Lhasa 851400,3.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037 |
| Abstract: | This paper discusses which period the quartz porphyry in the Dongzhongla Pb-Zn ore district belongs.Through the detailed geological mapping and using the high precision magmatic zircon LA-ICPMS U-Pb dating,the authors date the quartz porphyry from the Dongzhongla deposit.The dated 22 zircon grains from the quartz porphyry present that 206Pb/238U weighted mean age is 126.1±1.1 Ma(n=22,MSWD=0.96).Thus,it denies the previous understanding that these rock units belong to the Linzizong Group Pana formation in Eocene.The crystallization of the quartz porphyry occurred between 125.8~128.0 Ma during the late Yanshanian period.This is in accordance with the age of quartz porphyry from Yaguila which located in the east of Dongzhongla.It indicates that there existed large-scale magma activity before 126 Ma in Nyanqentanglha region. |
| Keywords: | Dongzhongla Pb-Zn deposit quartz porphyry LA-ICPMS zircon U-Pb dating late Yanshanian period |
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