Detrital Zircon of 4100 Ma in Quartzite in Burang,Tibet

查看全文 作　　者：DUO [1]Ji;WEN [2]Chunqi;FAN [1]Xiaoping;GUO [1]Jianci;NI [2]Zhiyao;LI [1]Xiaowen;SHI [3]Yuruo;WEN [2]Quan 机构地区：[1]Bureau of Geology and Mineral Resources of Tibet Autonomous Region, Lhasa, Tibet 850000;[2]Chengdu University of Technology, Chengdu, Sichuan 610059;[3]Beijing SHRIMP Center, Beijing 100037 出　　处：《Acta Geologica Sinica(English Edition)》索引2006年第80卷第6期,共3页 基　　金：The study was supported by the National Natural Science Foundation of China (grant 40472058); "973" project (grant 2002CB412600) ; Scientific Committee of the Tibet Autonomous Region (grant 2004-66). 摘　　要：A detrital zircon aged 4.1 Ga is discovered by the SHRIMP U-Pb method in a quartzite in Burang County, western Tibet. This is presently the oldest single-grain detrital zircon in China. The Th-U ratios of the two testing points of the >4.0 Ga zircon are between 0.76 and 0.86, indicating their magmatic origin. This discovery has offered an important age for investigating the geological evolution of the Qinghai-Tibet Plateau. 关 键 词：岩屑 锆石 石英岩 西藏 地质年代学