Water Column Survey of Hydrothermal Discharge Along the EastPacific Rise, 9 Degrees - 11 Degrees North

北纬 9 度 - 11 度东太平洋海隆沿线热液排放水柱调查

• 批准号: 9018007
• 负责人: John Lupton
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1992-05-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018007&HistoricalAwards=false
• 关键词: Water; Column; Survey; Hydrothermal; Discharge

New oceanic crust forms along the mid.ocean ridge axis by a complex interplay of magmatic, tectonic, and hydrothermal processes. These processes are known to vary significantly along the axis, as manifested by the division of the ridge into segments bounded by transform faults and overlapping spreading centers. Hydrothermal venting along the mid.ocean ridge is a first.order process that is responsibe for much of the heat loss from the ridge axis. This project will determine the distributions, relative intensity, and first.order chemical characteristics of hydrothermal venting along the morphologically, geophysically, and pertologically well.known segments of the East Pacific Rise between 9 03N and 11 10N by surveying the water column for hydrothermal plumes. This section of the ridge was chosen because it is well.studied, and because it encompasses portions of mid.ocean ridge with high magma supply as well as portions that are magmatically starved.

新的洋壳沿着洋中脊轴通过岩浆、构造和热液过程的复杂相互作用而形成。已知这些过程沿轴沿着变化很大，表现为洋脊被分割成以转换断层和重叠扩张中心为界的区段。大洋中脊热液沿着排放是一个一级过程，对脊轴的热损失起主要作用。本项目将通过对东太平洋海隆9.03 ~ 11.10 N之间的水柱进行测量，确定热液喷流沿着已知的地貌、沉积和火山段的分布、相对强度和一级化学特征。之所以选择这部分海脊，是因为它被很好地研究过，而且它包含了大洋中脊的部分，这些部分有着丰富的岩浆供应，也有着缺乏岩浆的部分。