Mineral-Catalyzed CO 2 Reduction in Subseafloor Hydrothermal Systems: An Experimental Study of Elevated Temperatures and Pressures

该项目涉及调查流体化学，矿物学，温度和压力对CO2在日益减少的条件下暴露于矿物表面时转化为更稳定化合物的速率和过程的作用。 一般来说，实验将在250至450摄氏度的温度下进行，使用一套适合海底热液系统的矿物和矿物组合。 实验设计强调在实验条件下溶解的碳物种和碳同位素的时间序列测量，并将充分利用理论地球化学的最新进展，以约束更好的反应在C-H-O系统。需要采取综合的实验和理论方法，以充分了解大洋中脊海底下反应区碳还原反应的范围和复杂性。

This project involves an investigation of the role of fluid chemistry, mineralogy, temperature and pressure on the rates and processes by which CO2 is converted to more stable compounds when exposed to mineral surfaces under increasingly reducing conditions. In general, experiments will be conducted at temperatures from 250 to 450 degrees C using a suite of minerals and mineral assemblages appropriate for subseafloor hydrothermal systems. The design of experiments emphasize time-series measurements of dissolved carbon species and carbon isotopes at experimental conditions and will take full advantage of recent advances in theoretical geochemistry to constrain better reactions in the C-H-O system. An integrated experimental and theoretical approach is needed to understand fully the range and complexity of carbon reduction reactions in subseafloor reaction zones at mid-ocean ridges.