Hydrothermal Discharge along the Axis of the East Pacific Rise from 9 Degrees-10 Degrees N

沿东太平洋轴线的热液排放从北纬 9 度上升至 10 度

• 批准号: 8817587
• 负责人: Rachel Haymon
• 金额: $ 36.97万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-15 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817587&HistoricalAwards=false
• 关键词: Hydrothermal; Discharge; along; Axis; East

Hydrothermal circulation at spreading centers is governed by the thermal regime and permeability structure of young ocean crust; thus, it is inextricably coupled to the volcano-tectonic processes along spreading centers. For virtually all spreading centers the interrelationships between hydrothermal, magmatic, and tectonic processes are poorly known because fine-scale mapping of the sea-floor has been restricted to very small segments of ridge crest. The present recommended award will rectify this situation for a major segment of the East Pacific Rise. Using the ARGO deep ocean search vehicle, the project will acquire both side-scan sonar and bottom photography from a one hundred mile long segment of this spreading center. This region has already been intensively studied using surface geological and geophysical techniques and the overall crustal structure is therefore well known. Objectives of the present project are: 1) to map the location of hydrothermal vents, 2) relate vent distribution to faulting and recent volcanic activity, and 3) determine the effect of ridge discontinuities on volcanic and hydrothermal activity. Data acquired during the survey will also be critical in locating sites for deep sea drilling to sample ocean crust.

扩张中心的热液循环 年轻海洋的热状况和渗透率结构 因此，它是不可避免地耦合到火山构造 沿着扩散中心进行。对于几乎所有的传播 集中了热液、岩浆、 和构造过程知之甚少， 海底的测绘一直局限于非常小的 脊顶的片段。目前建议的赔偿额将 为东太平洋的一个主要部分纠正这种情况 上升. 利用ARGO深海搜索工具，该项目将 从一艘船上获取侧扫声纳和海底摄影 这个扩张中心长达100英里的区域这一地区 已经用地表地质学和 地球物理技术和整体地壳结构， 因此众所周知。本项目的目标是：1） 绘制热液喷口位置图，2） 分布到断层和最近的火山活动，和3） 确定山脊不连续性对火山的影响， 热液活动调查期间获得的数据还将 在确定深海钻探取样地点方面至关重要 洋壳