• 责任者：Zheng Wei (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Chen Maohong
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：钨矿 ; tungsten ores ; 多金属矿 ; polymetallic ores ; 铀—铅计时 ; U-Pb dating ; 广东 ; Guangdong
• 页码：p.4121-4135
• 图表：9 illus., 2 tables, 161 refs.
• 分类号：1001
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     Qin-Hang metallogenic belt is not only a collision of Yangtze Craton and Cathaysian Block, but also a unique copper-gold and tungsten-tin polymetallic metallogenic belt in South China. As the study examples of ore-bearing biotite granite in the Yingwuling tungsten polymetallic deposit, we performed in situ zircon U-Pb dating and Hf isotopic analyses for the first time. Twenty-one zircons of ZK2805-Y-1 sample yield excellent concordant results with a weighted mean 206Pb/238U age of 81.30.6Ma （n=22,MSWD=0.85）. So it is consistent with previous molybdenite Re-Os isochron age （83.01.7Ma） within error. It indicates that both the emplacement of the ore-bearing biotite granite and associated tungsten-tin polymetallic mineralization in the Yingwuling mining area occur in the Late Cretaceous. Most εHf（t） values of the Yingwuling biotite granite are minus. εHf（t） values have a range of -5.72~1.40, and the mean is -2.09, which mainfests that they are mainly crustal origin. On the εHf（t） versus age diagram, εHf（t） are below the evolution curve of chondrite and analyzed points show weak-depleted characteristics, indicating that partial-melting crust magma may have a small amount of mantle material to join. The age of stage （tDM2 ） is 1.06~1.51Ga, showing rock-forming materials mainly derived from the ancient Middle Proterozoic crustal partial melting. Based on the data of geochemistry, petrology and precise isotope ages, we can infer that the Yingwuling tungsten polymetallic deposit formed under the environment of lithospheric extension and thinning.