Classification,metallogenesis and exploration of silver deposits in Daxing’anling of Inner Mongolia and its adjacent areas  

作　　者：Biao Jiang Deng-hong Wang Yu-chuan Chen Tong Zhang Xiu-lang Pu Wen-wen Ma Yan Wang Guang Wu Li-wen Wu Tong Zhang Xue-jiao Li Jie Yan Yu-shan Zuo Hong-jun Sun Zhi-yuan Li 

机构地区：[1]MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,China Geological Survey,Ministry of Natural Resources,Beijing 100037,China [2]Xi’an Institute for Innovative Earth Environment Research,Xi’an 710061,China [3]School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China [4]Key Laboratory of Magmatic Activity Mineralization and Prospecting of Inner Mongolia Autonomous Region,Geological Survey Institute of Inner Mongolia Autonomous Region,Hohhot 010020,China [5]Chifeng Yubang Mining Co Ltd,Chifeng 024000,China

出　　处：《China Geology》2022年第4期595-613,共19页中国地质（英文）

基　　金：financially supported by the projects of China Geological Survey(DD20221695,DD20160346 and DD20190379);the Fundamental Research Funds of the Central Public Welfare Scientific Research Institutes(JYYWF20183701 and JYYWF20183704);the Inner Mongolia Geological Exploration Fund Project(2020-YS03).

摘　　要：By the end of 2020,83 silver deposits(or ore occurrences),including four super-large-scale deposits,nine large-scale deposits,33 medium-scale deposits and 37 small-scale deposits or ore occurrences,have been proved.The amount of silver metal exceeds 86000 t with average grade of 100 g/t,which makes Daxing’anling region one of the the most important silver ore belt in China.However,the metallogenic characteristics and metallogenesis need to be clarified.The silver deposits in the study area are classified into three main types,which are magmatic hydrothermal vein type,continental volcano-subvolcanic type and skarn type,respectively.The supergiant deposits include the Shuangjianzishan deposit(silver metal amount of 15214 t with average grade of 138 g/t),the Baiyinchagandongshan deposit(silver metal amount of 9446 t with average grade of 187 g/t),the Huaobaote deposit(silver metal amount of 6852 t with average grade of 170 g/t),and the Fuxingtun deposit(silver metal amount of 5240 t with average grade of 196 g/t).The silver deposits are mainly distributed in the central and south of the Daxing’anling area,and mainly formed in the Yanshanian period.The silver polymetallic deposits in the Daxinganling area are significantly controlled by regional faults and the junction zone of volcanic rock basins and their margins.The north-east trending deep faults are the most important ore-controlling structures in this area.The distribution of silver polymetallic deposits along the main faults is obvious,and the intersection area of multiple groups of faults often form important mine catchments.The Permian is the most important ore-bearing formation in this area,but some important silver polymetallic deposits occur in Mesozoic volcanic basins or pre-Mesozoic strata.The magmatic rocks related to mineralization are mainly intermediate acidic or acidic intrusions,intermediate acidic lavas,pyroclastic rocks,and small intrusions of ultra-shallow or shallow facies of the Yanshanian Period.The mineralization element combination is

关 键 词：Silver deposit Deposit type Porphyry silver deposit Supergiant silver deposit METALLOGENESIS Mineral exploration engineering Prospecting direction Daxing’anling Inner Mongolia 

分 类 号：P618.52[天文地球—矿床学]