Origin of gray-green sandstone in ore bed of sandstone type uranium deposit in north Ordos Basin

查看全文 作　　者：LI ZiYing FANG XiHeng CHEN AnPing OU GuangXi XIAO XinJian SUN Ye LIU ChiYang WANG [1]Yi

机构地区：[1]Beijing Research Institute of Uranium Geology, Beijing 100029, China Beijing Research Institute of Uranium Geology, Beijing 100029, China Geological Party No.208, CNNC, Baotou 014010, China Beijing Research Institute of Uranium Geology, Beijing 100029, China Beijing Research Institute of Uranium Geology, Beijing 100029, China Beijing Research Institute of Uranium Geology, Beijing 100029, China Department of Geology, Northwest University, Xi'an 710069, China Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China

出　　处：《Science China Earth Sciences》索引2007年第50卷第z2期,共9页

摘　　要：Dongsheng sandstone-type uranium deposit is located in the northern part of Ordos Basin, occurring in the transitional zones between gray-green and gray sandstones of Jurassic Zhiluo Formation. Sandstones in oxidized zone of the ore bed look gray-green, being of unique signature and different from one of ordinary inter-layered oxidation zone of sandstone-type uranium deposits. The character and origin of gray-green sandstones are systematically studied through their petrology, mineralogy and geochemistry. It is pointed out that this color of sandstones is originated from secondary oil-gas reduction processes after paleo-oxidation, being due to acicular-leaf chlorite covering surfaces of the sandstone grains. To find out the origin of gray-green sandstone and recognize paleo-oxidation zones in the ore bed are of not only theoretical significance for understanding metallogenesis of this kind of sandstone-type uranium deposit, but also very importantly practical significance for prospecting for similar kind of sandstone-type uranium deposit. 关键词：ORDOS Basin, SANDSTONE-TYPE URANIUM deposit, gray-green sandstone, oil-gas, ORIGIN

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Origin of gray-green sandstone in ore bed of sandstone type uranium deposit in north Ordos Basin

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