中文摘要：

湖南湘东钨矿是锡田地区一个产于花岗岩体中的重要石英脉型钨矿,也是一个有着几十年开采历史的危机矿山.通过对与石英脉钨矿有密切成因关系的邓埠仙岩体开展野外地质调查和成岩时代研究,利用锆石LA-ICP-MS U-Pb定年法,获得邓埠仙中细粒二云母花岗岩体的成岩年龄为（159±0.8） Ma,与前人获得的辉钼矿Re-Os年龄较为一致,均为晚侏罗世.结合锡田矿区已有的年代学资料,指出本区的成岩成矿年龄主要集中在150～ 160 Ma,本区的成岩成矿时代与华南中生代第二次大规模成矿作用时期相吻合,成岩成矿地球动力学背景为华南中生代岩石圈伸展时期板内拉张环境.

英文摘要：

Xiangdong tungsten ore is a important quartz vein type tungsten ore in granite body in Xitian area of Hunan province. Based on geological investigation and diagenetic age study to Dengfuxian granite rock which related closely to the quartz vein type tungsten ore body. Zircons in the fine grained mica granite rock mass from the Dengfuxian yield excellent concordant results with a weighted mean ^206Pb/^238U age of （159 ± 0.8 ） Ma, and it is consistent with previous molybdenite Re-Os isochron age. It indicates that both the emplacement of the ore-bearing granite and associated tungsten-tin mineralization occur in the late Jurassic. Existing chronology combined with tin field area pointed out that the diagenesis of regional metallogenic age are mainly concentrated in 150 - 160 Ma, belonging to the Mesozoic. The era of diagenesis and metallogenesis coincided with the second large-scale mineralization in Mesozoic era in this region. The geodynamics environment of diagenesis and metallogenesis is an extensional environmenttension when the plate of the South China is in an inner-plate extention periodduring the Mesozoic.