Genetic Mineralogy And Deep Prospects Of Linglong Gold Deposit In Zhaoyuan,East Shandong Province

Based on the previous research achievements,this paper makes an in-depth study on genetic mineralogy of pyrite,quartz and other minerals from Linglong gold deposit.The result on microelements of pyrite shows that the content of high-temperature elements Co?Ni and the ratio of Co/Ni all decrease gradually from stage ? to stage ? and ?,which suggests that the mineralization temperature lessens by degrees;the total quantity of microelements in high-grade ores(state? and ?)tends to be much more than that in the lean ones(stage ?).The high-content of microelements and the enrichment of low-temperature elements can be used as one of prospecting criteria.The total microelements,the percent of Cu+Pb+Zn and Ga+In+Cd+Tl in the Xishan orefield are all greater than that in the Dongshan orefield,which tell the difference between Dongshan orefield and Xishan orefield;Along with the elevation reducing,the content of As+Sb+Te tends to decrease firstly and then increase,and the content of Cu+Pb+Zn shows a similar tendency while the content of Co+Ni+Ti+Cr is very different,which indicates that the mineralization tends to have pulsation changes in vertical,predicting a big prospecting potential in the deep.The thermoelectric coefficient of pyrite in Dongshan orefield ranges from-401.8 to +552.1?V/?;the conduction type is mainly mixture of P-N type and N-P type;the appearace rate of P type changes wavily and decreases on the whole with the orebody downward extension.The electric resistivity of pyrite shows an inverse correlation with an average gold grade,and it also changes vavily with the orebody downward extension,which is caused by multi-mineralization.The thermoluminescence study of quartz shows that the average peak point temperature and luminescence intensity of speciments of major metallogenic stages(stage ? and ?)quartz are obviously lower than those of stage I specimens.The mean values are 209.62?(516.36?Gy)and 225.5?(1852.44?Gy)respectively.It's predicted that the regions bellow-670m at No.47 vein in Dakaitou,ranging from exploring line 75?93 and 63?72,are favourable prospecting targets,according to the thermoelectricity and resistivity studys of pyrite,as well as the thermoluminescence study of quartz,;No.55 vein in Xishan orefield has a lower denudationrate(36.67?47.73%),therefore it still stay a good condition for future production.The pyrite rare-earth elements characteristics,helium-argon isotope tracing,quartz hydrogen-oxygen isotope tracing and the calcite carbon-oxygen isotope tracing show that the metallogenic fluid of Linglong gold deposit is dominantly from magmatic water with the basic dyke rock activities,but the mantle fluid also play an important role,and there is atmospheric water in the late stage.The analytical results of the rare-earth element characteristics?sulfur isotope?lead isotope and the discovery of the tellurides associated with gold suggest that the metallogenic materials come from both mantle and crust,which is a mixed source.