Vertical Variability in Saturated Zone Hydrochemistry Near Yucca Mountain, Nevada

Patterson, G. ; Striffler, P.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: Removal;    Magnesium;    Sodium;    Boreholes;    Water Chemistry;   

DOI  :  10.2172/899951
RP-ID  :  NA
RP-ID  :  NA
RP-ID  :  899951

美国|英语

来源: UNT Digital Library

【 摘 要 】

The differences in the saturated zone hydrochemistry with depth at borehole NC-EWDP-22PC reflect the addition of recharge along Fortymile Wash. The differences in water chemistry with depth at borehole NC-EWDP-19PB appear to indicate that other processes are involved. Water from the lower part of NC-EWDP-19PB possesses chemical characteristics that clearly indicate that it has undergone cation exchange that resulted in the removal of calcium and magnesium and the addition of sodium. This water is very similar to water from the Western Yucca Mountain facies that has previously been thought to flow west of NC-EWDP-19PB. Water from the lower zone in NC-EWDP-19PB also could represent water from the Eastern Yucca Mountain facies that has moved through clay-bearing or zeolitized aquifer material resulting in the altered chemistry. Water chemistry from the upper part of the saturated zone at NC-EWDP-19PB, both zones at NC-EWDP-22PC, and wells in the Fortymile Wash facies appears to be the result of recharge through the alluvium south of Yucca Mountain and within the Fortymile Wash channel.