Understanding Red-Black Rock Series in Uranium Deposits of North China

1. 砂岩型铀矿红黑岩系控层 Co-constraint of red-black rock series on sandstone-type uranium deposits —以中国北方系列J-K盆地为例 A case study of Jurassic-Cretaceous basins in north China 金若时 中国地质调查局天津地质调查中心 Ruoshi Jin Tianjin Center, China Geological Survey

2. 2012-2018工程钻探 Uranium Project (2012-2018) Junggar Songliao Ordos Taking the Junggar, the Ordos and the SonTaking the Junggar, the Ordos and the Songliao basins as the focus example, we have compiled data of 200,000 kerosene exploration holes. gliao basins as the focus example, we have compiled data of 200,000 kerosene exploration holes. 1) A large number of new mineral producing sites that were discovered by investigation; 2) Geological facts and understandings totally different from previous classical theories and understandings about sedimentary environments were proposed.

3. North Ordos 红黑岩系定义 Definitions Red 红色岩系（氧化场） 红、褐、黄等 Red rock series (oxidation barrier) Brown The red rock series represent "oxidation " environment, including rock series in color, such as red, brown and yellow, etc Yellow 黑色岩系（还原障） 黑—灰色等 Black rock series (reduction barrier) Pale ivory the blackrock series indicate "reduction " environment with color including black, grey, green and so on. Grey Black

4. Songliao Junggar Ordos The uranium ore layers lie at the transitional zones of contemporary red and black rock Ore layers betewen the red to black rock series. Red is “field”,Black is” barrier”.

5. The Junggar Basin North South East Junggar 典型 矿产地 Typical deposits The uranium ore layers are the between red to black rock series, of Drilling Well Profile in the Jungga Basin.

6. Ordos The Ordos Basin The uranium ore layers are the between red to black rock series, of Drilling Well Profile in the Junggar Basin. 典型 矿产地 Typical deposits

7. 松辽盆地 The Songliao Basin Songliao In the Songliao basin, The uranium ore layers are also the between red to black rock series, located in the Cretaceous stratigraphy, such as Yaojia Formation and Nengjiang Formation. 典型 矿产地 Typical deposits

8. Viewpoint can draw from the distributions of red rock series, black rock series (organic matters) and sandstone-type uranium deposits in north China. Only contemporary rock red and black rock series would provide the field for the depositional of uranium. In south China, due to the lack of large scaled synchronous red-black rock series, only few sandstone-type uranium deposits are reported

9. Compared the red and black rock series ,and the sandstone-type uranium deposits,of Mesozoic in worldwide. These blue elliptical broken line areas are the overlapping domains of Mesozoic red rock series, and sandstone-type uranium deposits. While in the areas of single Mesozoic red rock series (red broken line) and single Mesozoic organic matters (black rock series; black broken line), the sandstone-type uranium deposits are absen Alps-Himalaya Cordillera-Andes South Africa Australia

10. Our principal understandings of the co-constraint of red-black rock series on sandstone-type uranium deposits: A case study of Jurassic-Cretaceous basins in north China have been published on 《Geology in China》in Chinese.

11. 谢 谢！ Thank you！ Спасибо！