关键词:  font-size: 10.5pt" face="宋体">特提斯喜马拉雅；姐纳各普金矿；扎西康；成矿系统；font-size: 10.5pt">Arfont-size: 10.5pt" face="宋体">-Arfont-size: 10.5pt" face="宋体">年龄

Abstract:  Jienagepu gold deposit is the latest discovery in Zhaxikang ore concentrating area in southern Tibet. This paper, aiming at studying its mineralization age and mechanism, dates the sericite's Ar-Ar ages in orebearing quartz vein, and H & O isotopes tracking, and compares the results with Pb-Zn-Au-Sb deposits within the same area. Result shows that mineralization age of Jienagepu gold deposit is 17.6±1.8 Ma, the same as the Pb-Zn-Au-Sb deposits and as light-colored granites and pegmatites in Cuonadong dome. Combined with H & O isotopes tracking, this paper thinks Pb-Zn-Au-Sb metallogenic system in Zhaxikang ore concentrating area is controlled by Cuonadong gneiss dome with mineralization age at 16.6~18.7 Ma. The Miocene magmatic events provided heat to drive the underground water circulation and extracted the mineralizing elements from strata or Himalaya, mixed with a small quantity of magmatic fluid and mineralizing elements, migrated along SN-striking faults and concentrated to form the deposit, forming a four-in-one dome-magma-strata-structure ore controlling system.

Key words:  font-size: 10.5pt">Tethyan Himalaya;Jienagepu gold deposit, Zhaxikang;metallogenic system;Arfont-size: 10.5pt" face="宋体">-Ar dating