Uranium-series isotopes transport in surface, vadose and ground waters at San Marcos uranium bearing basin, Chihuahua, Mexico

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• 作者：Juan Carlos Burillo Montú ; far^a ; Manuel Reyes Corté ; s^a ; ^b ; Ignacio Alfonso Reyes Corté ; s^b ; Ma. Socorro Espino Valdez^b ; Octavio Raú ; l Hinojosa de la Garza^a ; Diana Pamela Nevá ; rez Ronquillo^a ; Eduardo Herrera Peraza^a ; Marusia Renterí ; a Villalobos^a ; Marí ; a Elena Montero Cabrera^a ; ^{elena.montero@cimav.edu.mx}
• 刊名：Applied Geochemistry
• 出版年：2012
• 期刊代码：5_08832927
• 类别：ce
• 出版时间：June, 2012
• 卷：27
• 期：6
• 页码：1111-1122
• 文件大小：1264 K

摘要

In the U deposit area at San Marcos in Chihuahua, Mexico, hydrogeological and climatic conditions are very similar to the Nopal I, Pe帽a Blanca U deposit, 50 km away. The physicochemical parameters and activity concentrations of several ²³⁸U-series isotopes have been determined in surface, vadose and ground waters at San Marcos. The application of some published models to activity ratios of these isotopes has allowed assessing the order of magnitude of transport parameters in the area. Resulting retardation factors in San Marcos area are R_f238 鈮?#xA0;250-14,000 for the unsaturated zone and 鈮?10-1100 for the saturated zone. The results confirm that the mobility of U in San Marcos is also similar to that of the Nopal I U deposit and this area can be considered as a natural analog of areas suitable for geologic repositories of high-level nuclear waste.