Study On The Hydrothermal Alteration And Structural Superimposed Halos In The Northwest Jiaodong Of ShangZhuang Mining Area,china

The Shang Zhuang Gold Mine is located in the contact zone of two Mesozoic Linglong two granites and the Guojialing granodiorite,The predecessors have carried out some geophysical and geochemical prospecting and geological prospecting work,lacking systematic research on the metallogenic geological background,metallogenic age,ore-controlling elements,alteration and mineralization stages,source of metallogenic materials,properties of ore-forming,Structural superimposed halos fluids and other related geological characteristics of the deposit in this area,so the significance of the study is very important.The paper studies the mineralization age of the Shang Zhuang Gold Mine,the alteration phase of the surrounding rock,the alteration zone,the alteration rock petrography,the geochemistry of altered rock,the metallogenic material and the fluid evolution,etc.On the basis of the above research,the activity of elements in the process of middle low temperature hydrothermal alteration,the band out of elements in the process of alteration,the source and physical and chemical properties of the ore-forming fluid,the migration mode and precipitation mechanism of gold,the tectonic setting and the metallogenic model of the gold deposit are discussed.The main results achieved:1.The mineralization age of the Shang Zhuang Gold Mine is 126.2 + 1.9Ma.2.The inclusions in each stage of the Shang Zhuang Gold Mine are divided into four types: rich gas inclusions,CO2-H2 O two or three phase inclusions,H2 O solution inclusions and subcrystalline inclusions.3.The mineral formation of the Shang Zhuang Gold Mine may be mainly from the mantle source,and the early mineralization is a medium high temperature,low salinity and CO2 rich fluid system.The main metallogenic period,the fluid component evolved into a medium temperature,a rich CO2,low salinity fluid system.4.The Shang Zhuang Gold Mine is formed by the boiling of hydrothermal fluids and meteoric precipitation mixed fluids in the Guojialing granite.5.Although the Jiaojia fault in the Shang Zhuang Gold Mine developed strong wall rock alteration,the gold mineralization was not obvious in 600 meters.6.The coexistence of forehalo and tail halo has a certain indication for deep prospecting.of Shang Zhuang Gold Mine.