The alteration characteristic in Hecaokeng uranium ore field in southern Jiangxi province

This paper puts emphasis on studying the characteristics, vertical zoning and period division of the near-ore wallrock alteration in Hecaokeng uranium ore field. The results indicate that the colour of alterated rock near the earth surface is yellow due to the oxidation and become green in deep. Alkali metasomatism is dominated by potassium while albite is relatively weak. The alteration can be divided in to five stages based on their time order. Chemical analysis of serious rocks in section shows that uranium content bears positive relation to Fe2O3, Be, Pb, W, etc and no correlation to Mo during the process of alteration, mineralization and metallization. (authors)