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

基本信息

批准号：
0726838
负责人：
James Cowen
金额：
$ 6.78万
依托单位：
University of Hawaii
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 2010-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0726838&HistoricalAwards=false
关键词：
Collaborative research Large scale long

项目摘要

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将在洋壳中进行多学科钻孔实验，以评估多个空间和时间尺度（米到公里、秒到年）的水文地质、溶质和胶体迁移以及微生物过程和特性。这些实验的结果将在我们对洋壳内流体过程的理解方面取得重大进展，并将开发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洋壳内部和通过洋壳的流体循环。钻孔以及深层地层流体与浅层地层流体的混合程度（基于这些孔中部署的示踪剂的浓度和分布）、深层和浅层2基底储层之间的成分差异以及绘制地球化学回弹图，会比较慢比热和压力回弹，用于未来微生物和地球化学实验的评估。该奖项的资金将支持科学仪器的建设；通过遥控车辆安置、回收和更换长期仪器；从观测系统收集海底和海底下数据和样本；数据和样本分析；使用条件模拟对流体-热-溶质耦合传输进行数值模拟；学生培训；以及结果的呈现和发布。