Based on geological survey

core observation and documentation

combining observation under microscope and electron microprobe analysis

epigenetic alterations has been developed in Mengqiguer uranium deposit

the alteration includes limonition

kaolinization

hydromicazation

sericitization

chlorite

carbonatation

pyritization. The uranium minerals of ore are pitchblende and coffinite. Uranium mineral are shape of lumps

granular or fine veins and granular

lumpy

and berry-like pyrite

charcoal

quartz

feldspar and other close quarters. These features suggest that the deposit of industrial uranium mineralization and the role of epigenetic alteration are close.