Kinetics of Dissolution and Crystal Growth of Silicates and Aluminosilicates in Aqueous Solutions at Low Temperatures

这是一个继续研究的实验测定， 硅酸盐的溶解和沉淀动力学， 铝硅酸盐作为pH值，温度和吉布斯函数 反应自由能（G）;检查 使用表面分析技术（例如XPS， AES，STM，AFM），当与从 使用流通式反应器的溶液化学将提供 关于表面反应机制的信息;以及 获得的数据用于模拟低温，主要是大气降水 北方某侏罗纪寒武纪砂岩的水成岩作用 海 我们的实验工作是第一个描述这两个 主要成岩作用的溶解和沉淀速率 硅酸盐和铝硅酸盐， G，以及 第一个在更复杂的阶段测量沉淀率的人 比石英。 在一个准确的 多孔介质中二维流体动力学模型 应该会导致第一个完全定量的物理和 动力沉积成岩作用的化学解释 盆地

This is a continued study of the experimental determination of the dissolution and precipitation kinetics of silicates and aluminosilicates as functions of pH, temperature and the Gibbs Free Energy of reaction ( G); to examine the surfaces of the reacted minerals using surface analytical techniques (e.g. XPS, AES, STM, AFM) which when combined with rates determined from solution chemistry using flow-through reactors will provide information on surface reaction mechanisms; and to apply the rate data obtained to model low temperature, predominantly meteoric water diagenesis of a Jurassic feldspathic sandstone in the North Sea. Our experimental work is the first to describe both dissolution and precipitation rates of major rock-forming silicates and aluminosilicates as a function of G, as well as the first to measure precipitation rates in phases more complex than quartz. Incorporation of the full rate laws in an accurate two-dimensional hydrodynamic model of fluid flow in porous media should result in the first completely quantitative physical and chemical explanation of diagenesis in a dynamic sedimentary basin.