Collaborative research: Large-scale, long-term, multi-directional, cross-hole experiments in the upper oceanic crust using a borehole observatory network

合作研究：利用钻孔观测网络在上洋地壳进行大规模、长期、多方向的跨孔实验

• 批准号: 0727119
• 负责人: Charles Wheat
• 金额: $ 17.17万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0727119&HistoricalAwards=false
• 关键词: Collaborative; research; Large; scale; long

The PIs will conduct multidisciplinary borehole experiments in oceanic crust, to assess hydrogeologic, solute and colloid transport, and microbiological processes and properties at multiple spatial and temporal scales (meters to kilometers, seconds to years). Results of these experiments will comprise a major advance in our understanding of fluid processes within oceanic crust, and will develop new tools and methods that can be applied in many settings.Possible geochemical highlights from this project include an assessment of fluid circulation within and through the boreholes and the extent of mixing of deep formation fluids with shallow formation fluids (based on the concentration and distribution of tracers that have been deployed in these holes), differences in the composition between deep and shallow 2 basement reservoirs, and mapping the geochemical rebound, which will be slower than the thermal and pressure rebound, for the future assessment of microbiological and geochemical experiments.Funding from this award will support construction of scientific instrumentation; emplacement, recovery and replacement of long-term instruments by remotely operated vehicle; collection of seafloor and subseafloor data and samples from observatory systems; analysis of data and samples; numerical modeling of coupled fluid-heat-solute transport using conditional simulation; training of students; and presentation and publication of results.

pi将在海洋地壳中进行多学科的钻孔实验，以评估多个时空尺度（米到公里，秒到年）的水文地质、溶质和胶体运输以及微生物过程和特性。这些实验的结果将使我们对海洋地壳内部流体过程的理解取得重大进展，并将开发出可应用于许多环境的新工具和方法。该项目可能的地球化学亮点包括评估井内和井内的流体循环、深部地层流体与浅层地层流体的混合程度（基于在这些井中部署的示踪剂的浓度和分布）、深部和浅层基底储层之间的成分差异，以及绘制地球化学反弹图，这将比热、压反弹慢。用于将来微生物和地球化学实验的评估。该奖项的资金将用于支持科学仪器的建设；用遥控车辆放置、回收和更换长期仪器；从观测系统收集海底和海底数据和样本；数据和样本分析；基于条件模拟的流体-热-溶质耦合输运数值模拟培养学生；以及结果的展示和发表。