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

拟议的项目将调查方解石的动力学 在100 - 300 ℃温度下白云石沉淀 和相应的流体静压（约300至1000大气压）。 这个项目将对理解 碳酸盐岩埋藏成岩热液蚀变作用 因为它将提供一个系统的数据库， 和白云石沉淀（和方解石的方解石化）在高 温度和压力。 规划补助金是必要的1） 高温高压连续流搅拌精炼 反应堆系统，将用于实验; 2）进行 初步实验，以确定的最佳组合， 流速、初始流体的化学成分和种子质量 对于给定的降水率; 3）收集关于 每个流体参数的动力学效应的大小。

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.