THE VERTICAL DISTRIBUTION CHARACTERISTICS OF THE NANJIAOHE SILVER POLYMETALLIC DEPOSIT
SHI Zeming, ZHANG Chengjiang, NI Shijun, TAN Bangping, XU Bo, GUO Hu, WANG Pingli(College of Applied Nuclear Technology and Automation Engineering, Chengdu University of Technology, China)
The Nanjiaohe silver polymetallic deposit belongs to the low temperature sulfide deposit. There are evidences to indicate that it shows a vertical distribution by studying mineral assemblages, oreforming elements combination and the temperature, salinity and gas/liquid ratio of liquid inclusions. From the bottom to top, the minerals assemblages are galenitesphalerite→galenitesphaleritechalcopyritepyriteautimonite→autimonite, respectively. The oreforming association of elements is PbZnFeCu at the bottom, PbZnSbAuAg lies in the middle, and Sb lies on the top. This was maybe caused by the change of temperature, salinity, gas/liquid ratio, the difference of oreforming elements' property or the change of oreforming conditions.