| There is a Jingcun vault in Yunkai area at the junction of Guangdong and Guangdong in South China,which is about five kilometers away from Hetai gold mine.The nearest medium scale mineral has been discovered in the process of prospecting around Hetai gold mine field.Similar to Hetai gold deposit,the ductile shear zone controls the deposit.The biggest difference between them is that the Hetai gold orebody exists in the mylonitized mixed rock of the Yunkai Group,while the Jingcun gold deposit is produced in the mylonitized and fractured granite.The ore types of Jingcun gold deposit include altered myolith type and sulfide quartz vein type,and the gold grade can reach 205 PPB.Gold mainly exists in pyrite as fine granular inclusions,or embedded in other ores and quartz.Pyrite,kaolinization,pyrrhotite and sericite are the main alteration combinations of gold mineralization related minerals.Taking V1 mine as the object,the characteristics of primary halo zones are systematically studied,which will guide the development of deep exploration engineering.The multivariate analysis of the 12 trace elements shows that the gold deposit has the characteristics of a medium-low temperature hydrothermal gold deposit,and there is a positive correlation between Au and Cu,As and Sb,which is helpful to provide guidance for the exploration of Au.The axial zoning sequence of primary halos of No.4 exploration line shows the characteristics of reverse zoning sequence,which is Pb-Bi-W-Mo-Ag-Cu-Hg-Zn-As-Sb-Ba-Au from top to bottom.According to the turning rule of geochemical parameters in deep underground and the superposition and coexistence of fore-and-tail halos at the tail of V1 orebody;It is considered that there may be concealed ore bodies below the elevation of-500 m.Combined with the geochemical characteristics of ore-forming halo-forming elements,an ideal model of primary halo-superimposed V1 orebody is established. |
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