Chemistry of groundwater in tuffaceous rocks central Nevada
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Authors
Raker, Sarah L.
Issue Date
1987
Type
Thesis
Language
en_US
Keywords
Flow Path Chemical Model , Tuffaceous Rocks , Springs , Silicic Rocks , Stage Recharge Chemistry , Pahute Mesa Well , Yucca Mountain Well , Chemically Evolved Waters , Mineral Saturation , Mineral Stability , Cation Proportion , Mineral Formation , Ground-water , Nevada , Geology , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
A flow path chemical model in tuffaceous rocks was developed using statistical, graphical, and computer methods. Forty nine springs which discharged from glassy, devitrified, and variably altered silicic rocks represent early stage recharge chemistry. Chemical analyses from Pahute Mesa and Yucca Mountain wells penetrating similar rock type and representing further chemically evolved waters, were compared. Common traits included pH, S04, HC03, Si02, TDS, and mineral saturation and stability. The trace elements (Fe, Mn, F, Li, and Sr), Cl, and cation concentrations, and temperature distinguished the two end member groundwaters. The difference in cation proportion between the Ca-HC03 type recharge chemistry and the Na-HC03 type well chemistry may reflect a decrease in divalent ions upon secondary mineral formation and/or ion exchange with clay and zeolite minerals (chiefly smectite and clinoptilolite).
Description
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 a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)