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| 三江地区澜沧江带南段南林山基性岩体锆石U-Pb年龄及岩石地球化学特征 | |
| 引用本文： | 李钢柱,苏尚国,雷玮琰,段向东.三江地区澜沧江带南段南林山基性岩体锆石U-Pb年龄及岩石地球化学特征[J].地学前缘,2011,18(5):206-212. |
| 作者姓名： | 李钢柱 苏尚国 雷玮琰 段向东 |
| 作者单位： | 1. 地质过程与矿产资源国家重点实验室；中国地质大学（北京）地球科学与资源学院,北京100083／武警黄金第二支队,内蒙古呼和浩特010010 2. 地质过程与矿产资源国家重点实验室；中国地质大学（北京）地球科学与资源学院,北京100083 3. 云南省地质调查局,云南昆明,650051 |
| 基金项目： | 国家重点基础研究发展计划“973”项目(2009CB421008); 中国地质大学(北京)特聘教授科研启动基金项目(51900902006) |
| 摘 要： | 南林山基性岩体位于西南三江地区,岩体主要由辉长岩和闪长岩组成。通过ID-TIMS锆石U-Pb年代学方法对南林山岩体中闪长岩进行精确定年,获得其结晶年龄为（298.44±0.33）Ma,表明南林山基性岩体的形成时代为早二叠世。全岩主量、微量元素与稀土元素等研究表明,辉长岩和闪长岩总体上均呈现轻稀土元素（LREEs）相对于... |
| 关 键 词： | U-Pb年龄 锆石 ID-TIMS 岛弧 南林山 澜沧江 |
Precise ID-TIMS zircon U-Pb age and whole-rock geochemistry of the Nanlinshan mafic intrusion in the southern Lancangjiang arc terrane,Sanjiang area,SW China |
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| Li Gangzhu,Su Shangguo,Lei Weiyan,Duan Xiangdong .State Key Laboratory of Geological Processes , Mineral Resources,School of Earth Sciences , Resources,China University of Geosciences,Beijing ,China .No. Gold Geological Party of CAPF,Huhhot ,China .Yunnan Institute of Geological Survey,Kunming ,China.Precise ID-TIMS zircon U-Pb age and whole-rock geochemistry of the Nanlinshan mafic intrusion in the southern Lancangjiang arc terrane,Sanjiang area,SW China[J].Earth Science Frontiers,2011,18(5):206-212. | |
| Authors: | Li Gangzhu Su Shangguo Lei Weiyan Duan Xiangdong State Key Laboratory of Geological Processes Mineral Resources School of Earth Sciences Resources China University of Geosciences Beijing China No Gold Geological Party of CAPF Huhhot China Yunnan Institute of Geological Survey Kunming China |
| Institution: | Li Gangzhu1,2,Su Shangguo1,Lei Weiyan1,Duan Xiangdong3 1.State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China 2.No.2 Gold Geological Party of CAPF,Huhhot 010010,China 3.Yunnan Institute of Geological Survey,Kunming 650051,China |
| Abstract: | The Nanlinshan gabbroic intrusion occurred in the southern Lancangjiang arc terrane,Sanjiang area,SW China,which consists of gabbro and diorite.The U-Pb age of zircons from the diorite determined by ID-TIMS is 298.44±0.33 Ma.The diorite and gabbro samples are all characterized by moderate enrichment of light rare-earth elements relative to heavy rare-earth elements and depletion in some high field strength elements such as Nb,Ta,Zr,and Hf.These characteristics are similar to that of the island arc,and the Nanlinshan intrusion can be considered as an evidence for intra-oceanic subduction in the Early Permian in the region. |
| Keywords: | U-Pb dating zircon ID-TIMS island arc Nanlinshan Lancangjiang |
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