...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Geology >Use of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in Sao Paulo state, Brazil
【24h】

Use of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in Sao Paulo state, Brazil

机译：使用U同位素不平衡来评估巴西圣保罗州的风化率和化肥衍生的铀

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The U-disequilibrium method was utilized to evaluate the velocity of alteration of rocks and fertilizer-derived uranium in the Corumbatai River basin, Sao Paulo state, Brazil. The Corumbatai River basin is affected by the continuous use of fertilizer-derived uranium utilized in sugar cane crops, increasing the dissolved uranium concentration in the Corumbatai River (Santa Terezinha station) in the wet period to 43%. The weathering rate in the Corumbatai River basin utilizing the U-isotope modeling was 0.0265 mm/year (corresponding to 38,000 years to weather 1 m of rock under actual climatic conditions). However, when the inputs of anthropogenic uranium were considered, then a weathering rate of 0.022 mm/year (corresponding to 45,500 years to weather 1 m of rock) was determined. The removed material in the Corumbatai River basin is mainly from two sub-basins (the Cabecas River and Passa Cinco River), where the sandstones weather easier than the siltstones and claystones in the basin.
机译：利用U-不平衡法评估了巴西圣保罗州哥伦拜台河流域岩石和化肥衍生的铀的蚀变速度。连续使用甘蔗作物中使用的化肥衍生铀影响了Corumbatai流域，使湿润时期Corumbatai河（Santa Terezinha站）中的溶解铀浓度增加了。利用U同位素模型在Corumbatai河流域的风化速率为0.0265 mm /年（相当于在实际气候条件下风化1 m岩石的38,000年）。但是，当考虑到人为铀的输入时，确定的风化率为0.022毫米/年（对应于风化1 m岩石的45,500年）。哥伦拜泰河流域的去除物质主要来自两个子流域（卡贝卡斯河和帕萨·辛科河），那里的砂岩比流域的粉砂岩和黏土更易风化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号