The Application Of Ore-prospecting Using The Methods Of Phytogeochemistry And Primary Halos In Fanshan Area

Fanshan area is located in the Intersection of Shanghang-Yunxiao NW fault and Fuan-Nanjing NE fault, belonging to the Shanghang-Yunxiao copper polymetallic and alunite ore belt with Zijinshan ore field,which is an important Metallogenic prediction area. This paper has conducted the research about the potential for mineralization and prospecting prediction through the method of Phytogeochemistry prospecting and Primary halos prospecting.The author finds that mineralization of Au, Bi, Mo, W, Cu, Sn has relevance with each other and mineralization of Pb, Zn has relevance, Ag mineralization has an independent feature, through dealing with soil geochemical data with the method of factor analysis and cluster analysis. And the result reflects Fanshan area has the feather of multiperiodic mineralization. Data analysis indicates that eucalyptus Bark can absorb silver and lead better and Dicranopteris dichotoma absorb gold and copper better. The researcher finds that altered rocks and soil that belongs to the same area show a certain correspondence between plants anomalies after comparing profile anomalies to geological information, and plant anomalies are more obvious. So a conclusion appears that Phytogeochemistry is suitable for ore prospecting in Fanshan area.Through analysing statistical data of major joints and ferromanganese mineralization point in Large Fanshan area, We can conclude that the distribution characteristics of mineralized veins are consistent with the orientation of the main tectonic zone and the NW structure is the main ore-leading and ore-controlling structure. Surface characteristics indicate mineralization is mainly produced in tectonic fractured zone. By sampling Primary halos in systematization and data analysing, the author finds that Ag, Pb, Zn has strong mineralization, and Ag and Zn mineralization has a strong correlation with Mn mineralization. Combined with previous studies of geophysicak geochemical and geological characteristics about mineral deposit, a conclusion appears that Fanshan area has a capacity of forming Sub-volcanic hydrothermal Ag, Cu, Pb deposits, which are with effective metallogenic element association instructions of Cu, Mn, Pb, Zn, Mo.etc. Based on the above information, we arrange exploration lines 0, and suggest arranging drilling zk001 in the abnormal area. According to the research above, the author concludes the following ore prospecting signs of subvolcanic hydrothermal Ag, Pb, Zn ores, which are lithology signs, construction signs, signs of alteration, geophysical and geochemical signs.