Structural control of hydrothermal flow: A comparison between the RIDGE2000 sites and the Iceland spreading centers

热液流的结构控制：RIDGE2000 站点与冰岛扩散中心之间的比较

• 批准号: 0937393
• 负责人: Jeffrey Karson
• 金额: $ 15.94万
• 依托单位: Syracuse University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0937393&HistoricalAwards=false
• 关键词: Structural; control; hydrothermal; flow; comparison

This research carries out an integrative, comparative synthesis and compilation of known data among hydrothermal sites along the mid-ocean ridge at the RIDGE2000 focus sites on the East Pacific Rise, the Juan de Fuca Ridge, and the Lau Basin and extensively studied geothermal areas in Iceland. Analysis of the resulting co-registered bathymetric/ topographic, morphological, geological, and hydrothermal vent fluid chemistry and vent location data allow generation of a detailed picture of the distribution of vents and vent sites with respect to mapped and imaged structures, volcanic features, and hydrothermal deposits. Data from repeat surveys and/or long-term monitoring provide detail on changes in vent distribution and behavior over time to provide a clear picture of the short-term evolution of hydrothermal activity at each location. Results shed light on the interplay between heat sources, fluids and permeable pathways in the ocean shallow crust which has direct implications for the transport of heat, alteration of the crust, and distribution of hydrothermal products/ore deposits (both active and fossil). Broader impacts of the work include postdoctoral training and international collaboration with Icelandic scientists. Public outreach to K-12 classrooms will also be carried out.

本研究对东太平洋隆起、胡安·德·富卡山脊和劳盆地等洋中脊热液点的已知数据进行了综合、比较综合和汇编，并对冰岛的地热区进行了广泛研究。通过对共同记录的水深/地形、形态、地质、热液喷口流体化学和喷口位置数据的分析，可以生成关于喷口和喷口位置分布的详细图像，包括地图和成像结构、火山特征和热液矿床。来自重复调查和/或长期监测的数据提供了喷口分布和行为随时间变化的详细信息，从而提供了每个地点热液活动短期演变的清晰图景。研究结果揭示了海洋浅层地壳热源、流体和可渗透通道之间的相互作用，这对热输运、地壳蚀变以及热液产物/矿床（活动和化石）的分布具有直接意义。这项工作的更广泛影响包括博士后培训和与冰岛科学家的国际合作。对K-12教室的公众宣传也将进行。