Genetic Mineralogy And Prospecting Mineralogy Of The Ha Damenggou-Liu Bagou Deposit In Iner Mongolia,China

The northern margin of North China Platform is an important gold deposits(points) community,which metallogenic geological conditions are very favorable,is an ideal area for exploration of gold deposits.Ha Da Menggou-Liu Bagou super large gold deposit is a typical deposit characterized by largely potash feldspathization,lying in the north margin of North China Craton.In order to provide useful information for the deep mining area prediction, this paper based on the previous research results,from the perspective of genetic mineralogy and prospecting mineralogy,has researched pyrite,quartz and potassium feldspar which are closely associated with mineralization.The pyroelectricity of pyrite shows N type conductivity,and the forming temperatures of Liu Bagou deposit are mainly between 260 oC and 360 oC,the forming temperatures of Ha Da Meng Gou deposit are mostly between 205 oC and 289 oC.The cell parameters ao is between 0.54167 and 0.54214,slightly greater than theoretical value.The cell parameters are negatively related with elevation,and positively with gold grade.The large ratio of(Co+Ni)/As and the low content of As are an important typomorphic characteristic.The cell parameters of quartz are positively related with elevation.The trace elements of quartz are characterized by enrichment of Mo and Pb,and relative enrichment of Sr.The potassium feldspar is characterized by enrichment of Mo and Pb,and depletion of Rb,Zr,Nb and Th.The pyrite characterized by enrichment of LREE and a loss of high field strength elements such as Rb,Zr,Nb,Th and the ratios of Hf/Sm,Nb/La,Th/La are less than 1,which can explain the ore-forming fluid is enriched in Cl.Owing to metallogenic stage minerals are characterized by Eu positive anomaly such as pyrite,quartz and potassium feldspar,the ore-forming fluid is a kind of high temperature and strong reducing fluid.The pyroelectricity of pyrite and the cell parameters of quartz and pyrite research results show that,Liu Bagou deposit denudation extent is smaller than Ha Da Menggou deposit which has great potential for prospecting in depth.The east section of 313 vein is a key areas for next step prospecting work.Denudation extent of 28 and 62 vein are smaller than other Ha Da Menggou deposit veins show that,28 and 62 vein have good potential for prospecting.