藏北锑矿带美多献纳西低硫化型浅成低温热液锑-金银矿的发现及其地质意义OA

The Zangbei Sb metallogenic belt is one of the most important antimony metallogenic belts in China.Traditionally,Sb deposits developed in this metallogenic belt were believed to be controlled by faults and anticline,and are single Sb deposits without other metal associations.The Meiduoxiannaxi Sb-Au-Ag mineralization occurrence represents the first Au-bearing Sb mineralization identified in the Zangbei Sb metallogenic belt.In this paper,the types of hydrothermal alteration,characteristics of mineralization,and gangue and metal mineral associations were studied.The Meiduoxiannaxi Sb-Au-Ag mineralization has been preliminarily constrained to be the typical low-sulfidation epithermal Sb-Au-Ag mineralization.Our viewpoint is significantly different from those previous perspectives.Based on the new understanding of the genetic type of the Meiduoxiannaxi mineralization occurrence,combined with the result from induced polarization profile depth measurements,it is believed that this mining area still has good potential in search for Sb orebodies.In particular,future prospecting and exploration should focus on Au-Ag precious and Zn-Pb base metal orebodies.The discovery of the Meiduoxiannaxi low-sulfidation epithermal Sb-Au-Ag mineralization occurrence will play an important role in further investigating the genesis of Sb deposits in the Zangbei Sb metallogenic belt.It will have positive impacts on enriching the metallogenic series of mineral deposits,improving the regional metallogenic regularity,and expanding the regional prospecting direction in the Zangbei Sb metallogenic belt.In summary,the discovery of the Meiduoxiannaxi Sb-Au-Ag mineralization occurrence has significant regional metallogenic and prospecting significance.