Effects of Fluid Chemistry on Precipitation Kinetics of Calcite and Dolomite at Subsurface Temperatures (100-300 C) and Pressures (300-1000 atm)

地下温度 (100-300 C) 和压力 (300-1000 atm) 下流体化学对方解石和白云石沉淀动力学的影响

• 批准号: 9110687
• 负责人: Elizabeth Burton
• 金额: $ 1.8万
• 依托单位: Northern Illinois University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-07-15 至 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9110687&HistoricalAwards=false
• 关键词: Effects; Fluid; Chemistry; Precipitation; Kinetics

The proposed project will investigate the kinetics of calcite and dolomite precipitation at temperatures between 100 and 300oC and corresponding hydrostatic pressures (about 300 to 1000 atm). This project will be a significant contribution to understanding burial diagenesis and hydrothermal alteration of carbonate rocks because it will provide a systematic database for rates of calcite and dolomite precipitation (and dolomitization of calcite) at high temperatures and pressures. A planning grant is necessary to 1) refine the high temperature and pressure continuous-flow-stirred reactor system which will be used for the experiments; 2) conduct preliminary experiments to determine the optimal combinations of flow rate, chemical compositions of initial fluids, and seed masses for a given precipitation rate; 3) collect preliminary data on the magnitude of kinetic effects of each fluid parameter.

拟议的项目将在100至300oC之间的方解石和白云石沉淀的动力学和相应的静水压力（约300至1000 atm）。 该项目将是了解碳酸盐岩石岩石的埋葬成岩作用和水热改变的重要贡献，因为它将在高温和压力下为方解石和白云石沉淀率（以及方解石的白云岩沉淀率（以及对方解石）的速率提供系统数据库。 必须进行计划赠款，以提高将用于实验的高温和压力连续流动反应器系统； 2）进行初步实验，以确定流量的最佳组合，初始流体的化学成分以及给定降水速率的种子质量； 3）收集有关每个流体参数动力学效应大小的初步数据。