Use of major ion chemistry and environmental isotopes to delineate subsurface flow in Eagle Valley, Nevada
AuthorSzecsody, James Edward
AdvisorCampana, Michael E.
Geological Sciences and Engineering
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Snow sampling in the main recharge mountains of Eagle Valley indicates non-equilibrium fractionation of stable isotopes from: 6D/H = 6.0 ( 618o/160)-14 . There is significant correlation of isotopic depletion with elevation indicated by: 6 D/H = -9.9W1000 ft and 618/16 = -1.48V1000 ft. Electrical conductivity and chloride enrichment from snow to lysimetric water produces 4000 acre-ft/year of potential recharge from the Carson Range. Monitoring of lysimeters throughout the winter shows that ground is not frozen under snow. Contour maps of sulfate, chloride, sodium, carbon-13, and deuterium concentrations in the valley aquifer suggest thermal/non-thermal water mixing. Aquifer stable isotope values and recharge area values indicate recharge to the aquifer via stream channel infiltration and deep percolation. Tritium and carbon-14 dating of non-thermal water in the aquifer shows recharge from the Carson Range and near the Carson River, and the oldest non-thermal water in the basin center. Carson Hot Springs is about 12,500 years old and is isotopically depleted, whereas Prison Hot Springs contains recent water and is not depleted.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain high a quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
thermal/non-thermal water mixing
aquifer stable isotope values
recharge area values
steam channel infiltration
tritium dating of non-thermal water
carbon-14 dating of non-thermal water
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