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Published in:
2005 | OriginalPaper | Chapter
Alteration characteristics of the sandstone-type uranium deposit in Qianjiadian, Inner Mongolia
Authors : Wenming Dong, Jinrong Lin, Yuliang Xia, Daneng Qi
Published in: Mineral Deposit Research: Meeting the Global Challenge
Publisher: Springer Berlin Heidelberg
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The Qianjiadian deposit is a typical epigenetic sandstone-type uranium deposit. The host Yaojia Formation of the Upper Cretaceous age was reduced and altered due to migration of organic fluids from a deeper part of the basin. The main types of alteration comprises reducing of iron, argilitization, carbonatization, and pyritization of host rocks. The uranium mineralization is closely related to those alterations, and the uranium ore-bodies occur mostly in the gray altered sandstone and associate closely with matrix pyrite, albanite and clay minerals that were formed during alteration. The post-ore oxidations locally lead to further enrichment of uranium in ore bodies.