Study on Uranium Occurrence State of Sandstone-Type Uranium Deposits in HJQ Region, Ordos Basin

MA Ye; WU Bo-lin; LIU Ya-fei; LIU Chi-yang; ZHAO Zhong-ping; WANG Hai-tong; SONG Zi-sheng; WEI An-jun

2013 Vol. 46, No. 2

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MA Ye, WU Bo-lin, LIU Ya-fei, LIU Chi-yang, ZHAO Zhong-ping, WANG Hai-tong, SONG Zi-sheng, WEI An-jun. Study on Uranium Occurrence State of Sandstone-Type Uranium Deposits in HJQ Region, Ordos Basin[J]. Northwestern Geology, 2013, 46(2): 141-152.

Citation:

Study on Uranium Occurrence State of Sandstone-Type Uranium Deposits in HJQ Region, Ordos Basin

1.
State Key Laboratory of Continental Dynamic, Department of Geology(Northwest University, Northwest University, Xi'an 710069, China
2.
Xi'an Center of China Geological Survey, Xi'an 710054, China

Received Date: 18 February 2012

Revised Date: 12 December 2012

Publish Date: 15 June 2013

Abstract

Abstract

Because of its important economic value, sandstone-type uranium deposit have been highly concerned by geology exploration department around the world. The paper mainly studied the occurence state of Uranium in sandstone-type Uranium deposits in the Ordos Basin, using methods of electron probe, sequential extraction procedure and α-track etching. The results show that the Uranium ore is rich in coffinite,and contains very small amounts of uranothorite and brannerite, which mainly exist as adsorbed particles (1-5 μm). Part of the Uranium particles, presenting as larger microparticle assemblages, mainly exist in pyrite, chlorite, calcite and the cracks of organic matter, and a few of them appear in the cracks of quartz, limonite, mica and other minerals. α-track etching further confirms that the percentage of Uranium ore in the deposit is up to 50%, in which the dispersive adsorbed Uranium accounts for about 50%. What's more, the dispersive absorbed uranium is basically found in pyrite and organic matter, adsorption to other minerals is just about 5%.
- sandstone-type uranium deposit /
- the occurrence state of uranium /
- electron probe /
- sequential extraction procedure /
- α-track etching

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