Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (2): 225-232.doi: 10.11743/ogg20060213

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Geochemical behavior of geologic process of natural gas during mineralization of Dongsheng sandstone-type uranium deposit

Wu Bolin1, Wang Jianqiang1, Liu Chiyang1, Wang Feiyu2   

  1. 1. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, Shaanxi, 710069;
    2. China University of Petroleum, Beijing, 102249
  • Received:2005-12-20 Online:2006-04-25 Published:2012-01-16

Abstract:

Observation and testing of gas inclusion,fluid temperature,mineralogy and geochemical behaviors of minerals from epigenetic alteration,tracing of inclusion's hydrogen and oxygen stable isotopes,and correlation of oil/gas charging and uranium mineralization phases indicate that the bleaching phenomena and green epigenetic alteration,as well as uranium mineralization in Dongsheng deposit are mainly related with geologic process of natural gas.The natural gas is mainly of humic gas from the Upper Paleozoic.The main reducing agents for uranium mineralization are organic hydrocarbon gas,such as CH4,and some CO,H2S and H2.Therefore,the genesis of Dongsheng Uranium deposit is mainly related with geologic process of natural gas.

Key words: sandstone-type uranium deposit, natural gas, geochemistry, epigenetic alteration, reducing agent

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