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Vertical variability in saturated zone hydrochemistry near Yucca Mountain, Nevada

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Abstract

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 fades that has moved through day-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.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Vertical variability in saturated zone hydrochemistry near Yucca Mountain, Nevada
ISBN:
0894486918; 9780894486913
Volume
2006
Year Published:
2006
Language:
English
First page:
390
Last page:
394
Number of Pages:
5
Conference Title:
11th International High Level Radioactive Waste Management Conference
Conference Location:
Las Vegas, NV
Conference Date:
30 April 2006 through 4 May 2006