ZHOU Wei-de1, ZHANG Zheng-wei2, YUAN Sheng-chao3, WU Cheng-quan2,4, LI Yu-jiao2,4
1. Sichuan Institute of Metallurgical Geology and Exploration, Chengdu 610051, China;
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
3. Lhasa Tianli Mining Company, Lhasa 840000, China;4. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract: The Bairong copper molybdenum deposit, occurring in the middle of the Gangdise Mountains, is a middle size deposit in the Nyemo County of Tibet. The Bairong copper molybdenum deposit is hosted by biotite adamellite porphyry and dacite porphyry, which intrusived in the Himalayan period. Ore-bearing rock body is a complex massif and the invasion sequence can be divided into biotite adamellite porphyry→dacite porphyry→granite porphyry according to petrography and characteristics of the deposit. The mineralization epoches can be divided into magmatic period, hydrothermal period and supergene period. The average value of δ34S of pyrite in the ore is 0.15‰, very close to zero indicating that S was from the mantle. The Bairong deposit is a post collision porphyry copper molybdenum deposit. This geological characteristics and mineralization epoches study has guiding significance for prospecting.
Keywords: Bairong copper deposit porphyry copper molybdenum deposit mineralization epochs Gangdise porphyry metallogenic belt Tibet
