Time-Series Studies of Hydrothermal Vent Fluid Temperatures on the EPR 9'49'-51'N: Correlating Geological, Biological and Geochemical Processes following the 1991 Eruption

EPR 949-51N 热液喷口流体温度的时间序列研究：关联 1991 年喷发后的地质、生物和地球化学过程

• 批准号: 9711720
• 负责人: Daniel Fornari
• 金额: $ 3.71万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-15 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9711720&HistoricalAwards=false
• 关键词: Time; Series; Studies; Hydrothermal; Vent

During the course of the proposed study, analysis of the recorded vent fluid temperature data, and correlation of these data with the findings and observations made by biological and geochemical colleagues will allow evaluation of the following questions: (1) How have temperatures at high-temperature and low-temperature vents in the Bio- Transect area of the East Pacific Rise continued to change since the 1991 eruption; (2) What are the long-term (months to years) and short-term (hours to days to weeks) variations in fluid temperature and how do they correlate spatially along the Bio-Transect. Is there coupling between temperature changes in high-temperature or low-temperature vent fluids? Are sections of the Bio-Transect consistently hotter than others? What are the correlations to variations in fissuring and lava morphology along the ASC? (3) What geological changes (e.g. collapse of lava flow surfaces, microseismicity, dike intrusion and lava eruption) have occurred which reflect the thermal state of the axial summit caldera. (4) How has the composition (e.g. species diversity) and character (e.g., growth, health, areal coverage) of the biological communities at the different instrumented sites changed, and how do they correlate to the variations in vent fluid temperature measured by the probes. (5) Do tidal cycles provide a major influence on the thermal behavior of the vents, or do they simply modulate temperature at the seafloor by moving packets of warm water around in such a way as to influence biological processes at a local, community-scale.

在拟议的研究过程中，对记录的喷口流体温度数据进行分析，并将这些数据与生物和地球化学同事的发现和观察结果相联系，将有助于评价下列问题：（1）自1991年火山爆发以来，东太平洋海隆生物样带地区高温和低温喷口的温度如何持续变化;（2）流体温度的长期（数月至数年）和短期（数小时至数天至数周）变化是什么，以及它们如何在空间上沿着相互关联 的 生物横切。 有没有 耦合 温度变化之间的关系吗 生物断面的某些部分是否始终比其他部分更热？ 沿沿着ASC的裂隙和熔岩形态的变化有什么相关性？ (3)发生了哪些地质变化（如熔岩流表面的坍塌、微震活动、岩脉侵入和熔岩喷发），反映了轴向山顶破火山口的热状态。 (4)如何组成（例如， 物种多样性）和特征（例如， 增长，健康， 区域覆盖率）的变化，以及它们如何与探针测量的喷口流体温度的变化相关联。 (5)潮汐循环对热行为有重要影响吗 的 通风口，还是仅仅 通过移动温暖的海水来调节海底的温度，从而影响当地社区规模的生物过程。