Geological Characteristics And Genesis Of Gold Deposits In The Nenjiang-Heihe Area,Heilongjiang Province

The Nenjiang-Heihe tectonic belt is one of the most important tectonic b elts of China.Four gold deposits discovered in this block.Based on the study of mineralogy,petrology and mineral deposits.The geological characteristics of t he four deposits are summarized and summarized,and the genesis of the gold deposits on the tectonic belt is preliminarily discussed based on this.(1)The structural background,ore-controlling structure,ore body characteristics,wall rock alteration,mineral composition and fluid in inclusions of gold deposits are similar to typical orogenic gold deposits.(2)The data of fluid in inclusions of the Sidaohezi gold deposit indicate that the uniform temperature is mainly concentrated between 163-277?;the freezing point temperature is concentrated between-5~0?,mainly Concentrated between-1~-2.5?;salinity concentrated between 1.0~7.0%;density concentrated between0.80~0.98g/cm3.The data of fluid inclusions of the Mengdehe Gold deposits indicate that the uniform temperature is mainly concentrated between 225~350?;the freezing temperature is concentrated between-4.5~0.5?;the salinity is concentrated between 1.5~9.0%;The density is concentrated between 0.50~0.95g/cm~3.(3)Tellurium can be used as an indicator element for prospecting gold deposits.(4)The gold deposit of Nenjiang-Heihe tectonic belt is orogenic gold deposits...