Vertical zonation of epigenetic reduction alteration in sandstone layer in Baicheng area is analyzed and summarized,gray-black to black zone(mudstone and oil soaked sandstone zone),blue-gray to green-gray zone(gray-green zone),gray zone(pyritized and kaolinitized zone)and yellow zone(oxidized zone)are divided from lower to upper according to the color of the rocks.

This paper introduces the concept, the recognition criteria, the genesis and classification of the epigenetic alteration of sedimentary rocks in brief, and expounds the mineral-geochemical indications and characteristics of oxidation and reduction alterations in different geochemical zones in detail, and proposes the two models of ore-controlling zonation of epigenetic alteration.

Original geochemical types and epigenetic alteration of rocks in prospecting target stratum for uranium deposit in the southeast of Songliao basin