Multiple Sampling of DSDP/ODP Borehole Waters for Geochemical Studies

9301730 Gieskes本研究项目（更新）的目标包括：(1)海洋井眼流体水采样器的设计、建造和测试，该采样器可以使用电缆井眼再入技术进行部署；(2)利用法国NADIA/NAUTILE再入设施在1993-1994年选定的深海钻井项目/海洋钻井计划井眼附近提供的机会对选定的海洋井眼进行采样；(4)在不同温度和压力下的水-岩石地球化学实验室实验和模拟。海洋井眼流体的采样和化学分析将提供对海水-井眼壁岩石化学反应性质的见解，并有助于回答地层流体在海水-井眼相互作用中可能发挥的作用的基本问题。与建模工作一起，这些观测结果最终也将对理解高温海洋钻孔中的热液反应具有重要意义。＊＊＊

9301730 Gieskes The objectives of this research project (a renewal) include work on (1) design, construction, and testing of an ocean borehole-fluid water sampler that could be deployed using wireline borehole reentry techniques, (2) sampling of selected ocean boreholes using opportunities provided by French NADIA/NAUTILE reentry facility activities near selected Deep Sea Drilling Project/Ocean Drilling Program boreholes in 1993-1994, (3) water sampling at holes of opportunity, to be collected from the JOIDES Resolution during ocean drilling legs during 1993-1994, and (4) laboratory experimentation and modelling of water-rock geochemistry at varying temperatures and pressures. Sampling and chemical analysis of ocean borehole fluids will provide insights to the nature of seawater - borehole wall rock chemical reactions, and should help answer fundamental questions about the role that formation fluids may play in seawater-borehole interactions. Together with modelling efforts, these observations will also ultimately be of importance in understanding hydrothermal reactions in high- temperature ocean boreholes. ***