Experimental carbonate geochemistry and diagenesis

实验碳酸盐岩地球化学和成岩作用

• 批准号: 39679-2008
• 负责人: Mucci, Alfonso
• 金额: $ 4.01万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=474831
• 关键词: Experimental; carbonate; geochemistry; diagenesis

My research focuses on the mechanisms and rates of biogeochemical processes and my approach is a blend of controlled laboratory experiments, modeling, and field studies. The proposed research will be carried out at two spatial scales: the molecular/interfacial scale (surface chemistry of carbonate minerals) and macroscopic scale (sediment diagenesis) but both programs are intimately related. In the first program, the objective is to develop a mechanistic model capable of predicting: 1) the sorption behaviour of carbonate minerals under a variety of environmental conditions and 2) the kinetics of reaction (dissolution/precipitation) of these minerals. The surfaces of carbonate minerals are highly reactive and determine the concentration and mobility of trace elements in a variety of aquatic environments (e.g., carbonate aquifers, marine sediments, mine tailings). Despite their environmental significance (remediation and proxies for paleoenvironmental reconstructions) and broad industrial applications, including the recent thrust in CO2 mineral sequestration strategies, many aspects of the reactivity of carbonate minerals in aqueous solutions have yet to be elucidated.

我的研究重点是地球化学过程的机制和速率，我的方法是控制实验室实验，建模和实地研究的混合。拟议的研究将在两个空间尺度上进行：分子/界面尺度（碳酸盐矿物的表面化学）和宏观尺度（沉积物成岩作用），但这两个方案是密切相关的。在第一个程序中，目标是开发一个能够预测的机理模型：1）碳酸盐矿物在各种环境条件下的吸附行为和2）这些矿物的反应（溶解/沉淀）动力学。碳酸盐矿物的表面是高度反应性的，并决定了各种水生环境中微量元素的浓度和流动性（例如，碳酸盐含水层、海洋沉积物、尾矿）。尽管它们的环境意义（修复和代理古环境重建）和广泛的工业应用，包括最近的推力在CO2矿物封存策略，碳酸盐矿物在水溶液中的反应性的许多方面还有待阐明。