Origin, Evolution and Mixing of Saline and Dilute Ground- waters in a Regional Flow System, Kansas and Missouri

不同来源的盐水和稀释地下水汇合并混合在密苏里州和堪萨斯州两个并列的古生代含水层中。提出了在这个大尺度流动系统中控制地下水流动历史和地球化学演化过程的研究。要研究的过程包括重力驱动的流动、流体混合和水岩相互作用。这项检查将通过分析水的一系列化学和同位素系统来完成，包括主要和微量元素的浓度，H， O, Sr, Nd， B， U, Th， Pb和Ra的同位素组成，以及稀土元素的浓度。将利用模拟地下流体迁移过程中化学和同位素交换的定量模型对地下水演化模型进行评价。为这一流动系统开发的模型预计将对各种地质和环境问题产生重大影响，例如盆地盐水和铅锌矿床的起源，地壳中放射性核素、微量金属和碳氢化合物的运输，沉积物的成岩作用和水资源的管理。

Saline and dilute groundwaters of distinct origin converge and mix in two juxtaposed Paleozoic aquifers in Missouri and Kansas. Research is proposed that will investigate the processes that control the flow history and geochemical evolution of groundwaters in this large-scale flow system. Processes to be examined include gravity-driven flow, fluid mixing and water-rock interaction. This examination will be accomplished through the analysis of the waters for a range of chemical and isotopic systems, including major and trace element concentrations, H, O, Sr, Nd, B, U, Th, Pb and Ra isotope compositions, and rare earth element concentrations. Models for the evolution of the groundwaters will be evaluated using quantitative models that simulate chemical and isotopic exchange during the migration of subsurface fluids. The models developed for this flow system are expected to have significant implications for a variety of geologic and environmental issues, such as the origin of basinal brines and Pb-Zn ore deposits, the transport of radionuclides, trace metals and hydrocarbons in the Earth's crust, the diagenesis of sediments and the management of water resources.