WU Yue1,2, ZHANG Chang-qing3, TIAN Guang3
(1. School of Earth Environment and Water Resource,Yangtze University, Wuhan 430100, China;
2. Faculty of Geoscience and Mineral Resources, China University of Geosciences, Beijing 100083 China;
3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China)
Abstract: Paoma lead-zinc deposit is a carbonate-hold epigenetic deposit in Sichuan-Yunnan-Guizhou area of China. In this deposit, fluorite is the most important gangue minerals and closely associated with lead-zinc mineralization. REE element geochemical characteristics of two different types fluorite and ores were studied. We recognized that ore-forming fluids originated from the formation water were halogen-rich oxidation fluids. The continued evolution of ore-forming fluids formed purple fluorite, colorless fluorite and sulfide in succession, and corresponding ore-forming fluids changed from oxidizing into reducing environment. By heating organic-rich country rock of ore-forming fluids induced TSR reaction and could be a key factor to sulfide mineralization.
Key words: fluorite; REE geochemistry; MVT deposit; Ningnan
E-mail: leadzinc@163.com
ACTA MINERALOGICA SINICA Vol. 33, No. 3, 2013, Page 295-301
