Geochemical and Isotopic Analyses of Waters Associated with the Edwards Limestone Aquifer, Central Texas

Author Pearson FJ and Rettman RL (US Geological Survey)
Year 1976
Description Inorganic chemical analyses of various Edwards Aquifer samples circa 1976 using new field methods
Publisher Edwards Underground Water District
Location Edwards Aquifer, Balcones Fault Zone, San Antonio Segment
Cover View Download
File View Download

The results of analyses of 14 common chemical species dissolved in 92 samples of waters associated with the Edwards Limestone aquifer are tabulated. Additional analyses for stable carbon and radiocarbon and stable sulfur isotopes on 34 of these samples are also tabulated. Field collection and field and laboratory analytical techniques were designed to make these analyses useful for geochemical studies. Edwards waters can be grouped into five chemical types – recharge, main fresh water, varied, and two types of transitional and saline waters. All types are saturated with calcite and all transitional and saline waters are saturated with dolomite as well. Some saline samples are also saturated with gypsum, celestite, strontianite, and fluorite .