• 责任者：Gao Yiming (Key Laboratory of Metallogeny and Mineral Assessment ; MLR ; Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Chen Yuchuan
• 刊名：Acta Geoscientica Sinica
• 出版年：2012
• 卷期：33(4)
• 关键词：斑岩铜矿床 ; porphyry copper deposit ; 斑岩钼矿床 ; porphyry molybdenum deposit ; 成矿期 ; metallogenic period ; 西藏 ; Tibet
• 页码：p.613-623
• 图表：5 illus., 3 tables, 25 refs.
• 分类号：1001
• issnNo：ISSN1006-3021
• isbnNo：CN11-3474/P

Located in Quxu County of Tibet, the Dabu porphyry Cu-Mo deposit lies in the eastern part of the Gangdise belt. The authors made high-precision magmatic zircon dating of the granodiorite from the Dabu deposit. The U-Pb dating analyses show that the weighted mean ages of the porphyry from the main ore body are (16.5±0.05) Ma（n=13, MSWD=3, granodiorite） and (16.1±0.13) Ma（n=15, MSWD=1.03, monzonitic granite-porphyry）, respectively. The U-Pb dating analyses indicate that the granodiorite from the Xianjiaonang ore body has the weighted mean age of (16.2±0.04) Ma（n=13, MSWD=0.0064）.