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

这是一个实验测定硅酸盐和铝硅酸盐溶解和沉淀动力学作为pH，温度和反应的吉布斯自由能(G)的函数的继续研究；使用表面分析技术（如XPS， AES， STM， AFM）检查反应矿物的表面，当结合使用流动反应器从溶液化学中确定的速率时，将提供表面反应机制的信息；并将获得的速率数据用于模拟北海侏罗系长石砂岩的低温、主要是大气水成岩作用。我们的实验工作是第一个描述主要岩石形成硅酸盐和铝硅酸盐的溶解和沉淀速率作为G的函数，以及第一个测量比石英更复杂的相的沉淀速率。在多孔介质流体流动的精确二维水动力模型中加入完整的速率定律，将导致对动态沉积盆地成岩作用的第一个完全定量的物理和化学解释。

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.