Study on Formation Mechanism of Epigenetic Altered Zone in 
Zhiluo Formation, Northeastern Ordos Basin, North China

Abstract

Abstract: The area of northeastern Ordos Basin, which is rich in uranium resource, is one of the important metallogenic belts for sandstonetype uranium deposits in China. Previous study shows that uranium mineralization here is closely related to paleo interlayer oxidation. On the basic study of material composition and geochemical index of each epigenetic altered sandstone and original sandstone in paleo interlayer oxidation zone in Zhiluo Formation, it can be concluded that the main differences of material composition between green sandstone and gray sandstone are the content of clay minerals, calcites and pyrites. Moreover, the sandstone has its own characteristic of epigenetic alteration in different altered type. Finally, the formation mechanism of paleo interlayer oxidation has been discussed in this paper through the research of each epigenetic altered sandstone features which provides an important theoretical basis for deepening the uranium mineralization mechanism and establishing regional uranium metallogenic model in the study area.

Key words: geochemical index, paleo interlayer oxidation zone, formation mechanism, Zhiluo Formation, northeastern Ordos Basin

CLC Number:

LI Xide，YI Chao，GAO Hewei，CHEN Xinlu，ZHANG Kang，WANG Mingtai. Study on Formation Mechanism of Epigenetic Altered Zone in Zhiluo Formation, Northeastern Ordos Basin, North China[J]. Geoscience, 2016, 30(4): 739-747.

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Study on Formation Mechanism of Epigenetic Altered Zone in Zhiluo Formation, Northeastern Ordos Basin, North China

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