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利用化学稀释校正模型对鄂尔多斯白垩系中、深层地下水14C年龄进行了校正,并对中、深层地下水14C年龄的分布规律进行了分析。结果表明:深层地下水埋深比较大,难以接受地表水的补给,更新速度慢,其地下水14C年龄普遍大于中层地下水;鄂尔多斯盆地的大部分地区,地下水14C年龄以分水岭为界,向两侧逐渐增大;北区的摩林河和都思兔河地下水系统,沿着地下水的流向,地下水14C年龄逐渐增大,说明这两个流域为地下水的排泄区;盆地北区中、深层地下水14C年龄明显较南区小,说明北区地下水更新速度快,循环条件比南区好。
The chemical dilution correction model was used to correct the 14C age of middle and deep groundwater in the Cretaceous Ordos Basin. The distribution of 14C age of groundwater in middle and deep groundwater was also analyzed. The results show that the groundwater depth in deep groundwater is relatively large and it is hard to accept the replenishment of surface water. The 14C age of groundwater is generally greater than that of middle groundwater. In most parts of the Ordos Basin, the 14C age of groundwater is gradually increased by the watershed In the north, the Mulin River and Dusihe River groundwater system along the groundwater flow, the age of 14C groundwater gradually increased, indicating that these two basins are groundwater drainage area; North basin basin groundwater 14C age was significantly South small, indicating that the groundwater in northern renewal speed, cycle conditions better than the South.