The Metallogenic Laws And Prospecting Prediction Of Liucun Gold Deposit In Northwestern Jiaodong Peninsula

Zhaoyuan-Laizhou metallogenic belt in northwest Jiaodong is the most concentrated area of gold resources in China.It accounts for nearly a quarter of China's total reserves and production and has produced several super-large-and large-scale gold deposits.For a long time,geological,geochemical and geophysical research and exploration work has been carried out in this region by geological exploration units,scientific research institutes,colleges and universities,etc.,and many fruitful results have been achieved.In contrast,the research on the southern end of the Zhaoyuan-Laizhou metallogenic belt is of low degree and lacks formed ore-prospecting theory and model.This thesis has worked on the basis of integrating previous research results.New detailed field work,through systematic map research and rock ore analysis,analysis of regional metallogenic geological background,geological characteristics of mining area and geological characteristics of ore deposit,the relationship between strata,structure,magmatic rocks and gold deposits have been carried out in this study.The genesis and metallogenic rules of the deposit are summarized,and the metallogenic prospects of the deep and flanking liucun gold deposit are predicted by combining geophysical and geochemical characteristics.New results have been obtained through this study:1.The Liucun gold deposit is located in the southwest section of the Zhaoyuan-Laizhou gold metallogenic belt in northwest Jiaodong.The Liucun fault zone is considered as a branch fault extending to the south of Sanshandao-Cangshang fault and Xincheng-Jiaojia fault,similar metallogenic geological conditions are found in the northern end of Sanshandao fault and Jiaojia fault as well as in the whole Zhaoyuan-Laizhou gold deposit.2.According to the geological characteristics of the deposit,the gold grade of the liucun gold deposit has a positive correlation with its thickness,and there is no obvious change rule along the strike,when the vein from the abrupt change of the slow,thick,gold grade is higher.3.Content in three types of gold(fissure gold,gold,crystal gap)inclusion gold occurrence,and given priority to with fissure gold,accounted for 75%,reflects the main gold phase(phase II,III)had relatively strong brittle fractures,precipitation for gold element enrichment provides favorable space.4.Through the analysis of geophysical and geochemical characteristics in the study area,it is found that the deep and flanking parts of the ore-forming faults of Liucun gold mine have great prospecting potential.