Analysis on Metallogenic Conditions of Uranium-polymetallic Deposits in Egongshan Volcanic Basin

Egongshan volcanic basin which is rich in the uranium-polymetallic mineral in the Gan-Hang Tectonic volcanic belt. On the basis of collecting the previous exploration results,this paper has summarized the mineralization geological characteristics of uranium,gold and silver,analyzed the metallogenic conditions of Uraniumpolymetallic deposits in Volcanic Basin from Ore-forming elements gathering,structure,magmatic activity,wallrock alteration,cryptoexplosion and mantlederived material,etc. It is considered that the strong volcanic magma activity and function in Mesozoic has provided favorable basic geological conditions for the volcanic-cryptovolcanic hydrothermal Uranium-polymetallic deposits in the volcanic basin. It is suggested that study on the relationship between cryptoexplosive breccia and mineralization and whether the mantlederived material involves in the mineralization should be strengthened.