Dissimilar Mineral Interfaces: Understanding Mica/Mineral Surface Interactions

该项目的目标是开发一个定量模型，以解释粘土-石英和粘土-碳酸盐岩表面相互作用的地质实例。 在一般情况下，这项工作将导致一个基本的理解不同的矿物表面分离的水膜的相互作用。我们计划进行实验来测量由水膜分离的云母和二氧化硅之间的表面力。从这些实验中，我们将开发一个模型，预测短期的粘附力和长期的水化和“胶体”的力量，并在两个不同的矿物表面之间被困在分子薄的水流体膜的扩散。 还将研究温度和压力对这些相互作用的影响。 这些实验将由在广泛的地质条件下发现的表现出粘土-矿物相互作用的天然材料的组成来指导。

BolesEAR-0073813The objective of this project is to develop a quantitative model to explain geologic examples of clay-quartz and clay-carbonate surface interactions. In a general way this work will lead to a fundamental understanding of the interaction of dissimilar mineral surfaces separated by water films. We plan experiments to measure surface forces between micas and silica separated by water films. From these experiments we will develop a model predicting short-range adhesion forces and long-range hydration and 'colloidal' forces, and diffusion in molecularly thin aqueous fluid films trapped between two dissimilar mineral surfaces. The effects of temperature and pressure on these interactions will also be investigated. The experiments will be guided by the composition of natural materials exhibiting clay-mineral interaction which are found over a wide range of geologic conditions.