METALLOGENIC AGES OF GEJIU TIN ORE DEPOSIT IN YUNNAN PROVINCE
Qin Dexian1, Li Yingshu1, Tan Shucheng1, Chen Aibing1, Xue Chuandong1, Fan Zhuguo1, Dang Yutao2, Tong Xiang2, Wu Junde2, Li Yuxin2, Wang Haiyun2
1. Institute of Geology and Mineral Deposits, Kunming University of Science and Technology, Kunming 650093; 2. Yunnan Tin Industry Co. Ltd., Gejiu, Yunnan 661400
Abstract：
The formation of the Gejiu tin ore deposits experienced three generation mineralizations, which were, in an ascending order, the seabed basic volcano-sedimentary mineralization in the Indosinian epoch (metallogenetic series Ⅰ), the seabed exhalative hydrothermal sedimentary mineralization in the Indosinian epoch (metallogenetic series Ⅱ) and the superimposed granitism-reformed mineralization in the Yanshanian epoch (metallogenetic series Ⅲ). The paper analyzed metallogenetic ages of the above-mentioned metallogenetic series by means of Ar-Ar, K-Ar and Pb-Pb methods. The dating results showed that the ages of metallogenetic seriesⅠby Ar-Ar, K-Ar and Pb-Pb methods yielded from 95.93±5.41 to 123.91±15.41 Ma, 112.50±2.25 Ma and from 210 to 240 Ma respectively. The ages of metallogenetic seriesⅡ yielded from 191.81±2.26 to 205.11±4.38 Ma, 186.01±3.72 Ma and from 200 to 230 Ma respectively. The ages of metallogenetic series Ⅲ yielded from 83.23±2.07 to 85.22±2.38 Ma, 43.49±0.87 Ma and from 83 to 116 Ma respectively. In other words, the Gejiu tin ore deposit should be a mine with multiple phases of mineralization.
Qin Dexian,Li Yingshu,Tan Shucheng et al. METALLOGENIC AGES OF GEJIU TIN ORE DEPOSIT IN YUNNAN PROVINCE[J]. Chinese Journal of Geology, 2006, (1): 122-132.
2006, Vol. 
