Analysis on Metallogenic Enrichment Regularity of Tangjiagou Gold Deposit in Shandong Province

Tangjiagou gold deposit lies in southwest part of Muping-Rushan gold ore belt in Jiaodong area.After several times exploration work,larger breakthrough has been gained recently.The accumulated gold resources nearly reach large scale.Main outcropped strata in the mining area are Jingshan group metamorphic rocks in lower proterozoic era and Cenozoic Quarternary.Structures are mainly composed of Paleoproterozoic fold structures and Mesozoic fault structures.Gold mineralization altered belts are controlled by faults with the trend of NNE,NE and nearly EW trend.Main ore controlling structures distributed in NNE trend and nearly EW trend.Ore types are mainly pyritized quartz vein,pyritized cataclastic rock and pyritized marble.Mineralization has the characteristics of multi-stages.It is found that the ore-controlling structure and other structures as well as bifurcation of the ore-controlling structures are favorable ore-contained space.Mineralized alteration superposition areas indicate great prospecting potentiality in deep part.It is predicated that intersection areas of gold mineralization structures with the trend of NNE and sulfide enrichment areas with the trend of NE,intersection areas of strata in Jingshan group and intrusive rocks,and the intersection areas of contact zones and sulfide enrichment zones with the trend of NE are metallogenetic favorable zones.