On the Measurement of Reactive Mass Fluxes in Evaporative Groundwater-Source Lakes
Published:January 01, 1994
Joseph J. Donovan, 1994. "On the Measurement of Reactive Mass Fluxes in Evaporative Groundwater-Source Lakes", Sedimentology and Geochemistry of Modern and Ancient Saline Lakes Models, Robin W. Renaut, William M. Last
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The character and sequence of reaction products formed within evaporative groundwater-dominated lakes are controlled by source water chemistry, intensity of evaporation, residence time of lake water, and hydraulic flux ratio between groundwater inflow to the lake and lake water outflow to groundwater. Conventional hydrologic data (aqueous chemical concentrations, stage fluctuations, in-situ or other estimates of evaporation, aquifer characteristics) may be employed to calculate mass budgets for fluid and solutes (both conservative and reactive) in lake systems; by this approach, details of saline lake geochemical reactions may be resolved, supplementing inferences based on calculations of mineral equilibria. For lakes of known age, comparison of calculated mineral precipitation fluxes, based on aqueous chemistry, to sediment volume estimates allows projection of brine out-seepage and rates of eolian salt erosion, slow processes by which chemical mass is removed from storage. In an example case from the Clear Lake outwash aquifer in eastern Montana, mass budgets for two alkaline lakes in series—one a carbonate-producing marl-tufa lake, the other a sodium-sulfate-producing playa—suggest a major component (about 80 percent) of solute inflow to the playa basin is lost to brine outflow and wind erosion.
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Sedimentology and Geochemistry of Modern and Ancient Saline Lakes Models
Sedimentology and Geochemistry of Modern and Ancient Saline Lakes - This volume of papers grew out of a four-day symposium entitled ?Sedimentary and Paleolimnological Records of Saline Lakes? held at Saskatoon, Canada in August, 1991. The aim of this Special Publication is to bring together selected papers from this conference that deal specifically with the sedimentological, inorganic geochemical, and hydrological aspects of salt lakes and their stratigraphic records. This volume is divided into four sections. The first section contains papers that deal with modern saline lakes. The second section contains papers dealing with sedimentation and diagenesis of late Quaternary salt lakes. The third and fourth sections contain papers devoted to ancient (pre-Quaternary) Lacustrine sequences.