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

耦合化学和物理过程及其对脊侧热液系统的影响：理想化二氧化硅成岩作用的初步研究

• 批准号: 9502970
• 负责人: Peter Ortoleva
• 金额: $ 7.56万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9502970&HistoricalAwards=false
• 关键词: Coupled; Chemical; Physical; Processes; Their

9502970 Ortoleva 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. ***

9502970 Ortoleva冷海水循环到深海中，加热，将化学成分与地壳交换，然后作为加热的热液水出现。 这个过程对海角和海水的组成有深远的影响。 目前，很多关注的重点是从山脊波峰的热通风口退出的水热水，但是很大一部分水从山脊侧面的沉积物中出来。 支持者认为，山脊侧面环境的物理，化学和矿物学特征的特征比山脊波峰环境要好得多，因为通过钻孔比山脊波峰更容易进入。 研究计划是通过多孔流和扩散从玄武岩地下室到沉积物的流体流动，并确定液体的化学变化以及沉积物的化学和矿物学变化是什么。 这将作为一项试点研究，对现有的计算机模型进行研究，该研究将根据温度，流体流量和沉积物的初始物理条件生成化学轮廓。 结果将与在四个沉积区域发现的化学概况进行比较。 ***