LI Zhi-jun1 , HUANG Yong1,2, TANG Ju-xing3 , ZHANG Li4, LANG Xing-hai1,2
(1. Chengdu University of Technology, Chengdu 610059, China;
2. Tibet Tianyuan Minerals Exploration Ltd., Lhasa 857000, China;
3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 10037, China;
4. Chengdu Center of China Geological Survey, Chengdu 610082, China)
Abstract: Xiongcun Coper-gold deposit is one of the large porphyry copper-gold mines discovered in Tibet, with ore minerals including chalcopyrite, pyrite, pyrrhotite, magnetite, galena and sphalerite. The pyrrhotite is high in ore and usually accretes to chalcopyrite. It is indicated with the electron microprobe that the pyrrhotite has two crystal forms, hexagonal and monoclinic. The ore-forming sequence is following the order of cp+py+mt, cp+py+pyr and py+sph+gal. According to the result of micropobe analysis, the formational temperature is about 360 ℃ and then drops slowly, suggesting the long time of mineralization.
Key words: pyrrhotite; typomorphic characteristics; porphyry copper-gold deposit; Xiongcun; Tibet
E-mail: lizhijun@cdut.edu.cn
ACTA MINERALOGICA SINICA Vol. 32, No. 2, 2012, Page 205-210
