Coupled Chemical and Physical Processes and Their Influence on Ridge-Flank Hydrothermal Systems: A Pilot Study of Idealized Silica Diagenesis

9504546小麦冷海水循环到洋壳深处，被加热，与地壳交换化学成分，然后以加热的热液水的形式出现。这一过程对洋壳和海水的组成产生了深远的影响。目前，人们关注的焦点是山脊顶热喷口排出的热水，但很大一部分热水是通过山脊两侧的沉积物排出的。支持者认为，山脊侧面环境的物理、化学和矿物学特征比山脊环境好得多，因为山脊侧面比山脊更容易钻探。研究计划是了解玄武岩基底流体通过多孔流动和扩散向上穿过沉积物的情况，并确定流体中的化学变化和沉积物中的化学和矿物学变化。这将作为利用现有计算机模型进行的初步研究，这些模型将根据温度、流体流动和沉积物的初始物理条件的边界条件生成化学剖面。结果将与在四个沉积区域发现的化学特征进行比较。***

9504546 Wheat Cold sea water circulates deep into the ocean crust, is heated, exchanges chemical constituents with the crust, and then emerges as heated hydrothermal water. This process has a profound effect on the composition of the ocean crust and sea water. Presently much attention is focused on the hydrothermal water exiting from hot vents at ridge crests, but a large proportion of the water exits through sediments on the ridge flanks. The proponents argue that the physical, chemical, and mineralogical characteristics of the ridge flank environment has been characterized much better than the ridge crest environment because the flanks are much more accessible by drilling than ridge crests. The research plan is to understand the fluid flow up from basalt basement through the sediment by porous flow and diffusion, and to determine what are the chemical changes in the fluid and the chemical and mineralogical changes in the sediments. This will be done as a pilot study with existing computer models that will generate chemical profiles based on boundary conditions of temperature, fluid flow, and initial physical conditions of the sediment. Results will be compared to chemical profiles found in four sedimented areas. ***