Geological characteristics and prospecting potential of Xinlong gold deposit in the central section of Middle Lhasa block of Tibet
DI Mengxiang1, CHEN Wei2, ZHAI Degao1, LIU Qingping1, YU Jiajia2, WANG Yankai3, LUO Long4, WU Wenxian4, BAI Chao4
1. School of Earth Science and Resource, China University of Geosciences (Beijing), Beijing 100083, China; 2. MNR Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. Regional Geological Survey Institute of Hebei Province, Hebei Langfang 065000, China; 4. China Geological Survey Military-Civilian Integration Geological Survey Center, Sichuan Chengdu 610036, China
Abstract：Xinlong gold deposit in Middle Lhasa block of Tibet has great prospecting potential. Through mineral geological survey and preliminary drilling verification, three ore bodies were delineated, which are controlled by the NNW and NNW fault structures. These three ore bodies exist in rhyolitic breccia lava, and the Au-II gold belt are 300~1 000 m long and up to 10 m thick, with single engineering grade of 17.97g/t. It is predicted that the ore body of Xinlong gold deposit can reach large scale, and the whole mining area is expected to reach super large scale. The output of gold is divided into two types, that is galena + arsenonickel + gold combination and pyrite+ quartz + gold combination. The alteration in the mining area is mainly dominated by silicification and medium to high grade argillation. According to the characteristics of mineralization and alteration, it is considered that Xinlong gold deposit is a high sulfide epigenetic type gold deposit, which is the first gold deposit of this type in continental volcanic rocks in Tibet. According to the comprehensive geological analysis, there is a complete porphyry-epithermal type Cu-Au metallogenic system in Xinlong-Langmeila area, which has great prospecting potential. The discovery of Xinlong gold deposit could open up a new direction for the exploration in the northern Tibet gold deposit.
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2024, Vol. 11 
