Quantitative Investigation of Aqueous Organic Compounds in Ridge-Crest Hydrothermal Fluids
Quantitative Investigation of Aqueous Organic Compounds in Ridge-Crest Hydrothermal Fluids
批准号:
9906752
负责人:
Jeffrey Seewald
金额:
$20.99万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-11-01 至 2002-04-30
中文摘要
有机化合物在海洋中脊海水热液通过地壳的循环过程中起着重要的化学、物理和生物作用。尽管它们很重要,但目前尚不清楚沉积和非沉积轴向温泉系统热液中含水有机物质的丰度和组成。在这项研究中,将使用新设计的气密流体采样器和潜水器Alvin在Juan de Fuca山脊北部的Endeavour和Middle Valley热液区对热液流体进行采样。新的采样器允许在单个流体样品中定量地确定挥发性和非挥发性水性物质的丰度。流体将进行定量分析,以获得广泛的水性有机和无机物种,以充分表征地下化学环境,并限制有机-无机化学相互作用的程度。这些结果将使人们对热液系统中调节有机物种产生和破坏的因素有更多的了解,并允许对广泛的生物地球化学过程进行评估,如地壳蚀变、成矿金属的动员、从海洋地壳到水柱的碳通量、支持地下生物圈的营养物质的可用性,以及可能代表生命前体的有机化合物的非生物合成。
英文摘要
Organic compounds play an important role in numerous chemical, physical, and biological processes during circulation of seawater-derived hydrothermal fluids through the crust at mid-ocean ridges. Despite their importance, the abundance and composition of aqueous organic species in hydrothermal fluids from sedimented and unsedimented axial hot-spring systems are presently unknown. During this study, hydrothermal fluids will be sampled at the Endeavour and Middle Valley hydrothermal fields, northern Juan de Fuca ridge using a newly designed gas-tight fluid sampler and the submersible Alvin. The new sampler allows the abundance of both volatile and non-volatile aqueous species to be determined quantitatively in a single fluid sample. Fluids will be analyzed quantitatively for a broad spectrum of aqueous organic and inorganic species to fully characterize subsurface chemical environments and constrain the extent of organic-inorganic chemical interaction. The results will lead to an increased understanding of factors that regulate the generation and destruction of organic species in hydrothermal systems and allow evaluation of a broad spectrum of biogeochemical processes such as crustal alteration, mobilization of ore-forming metals, the flux of carbon from the oceanic crust to the water column, the availability of nutrients to support a subsurface biosphere, and the abiotic synthesis of organic compounds that may represent precursors to life.
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Collaborative Research: Elucidating Brine-Dominated, Segment-Scale Hydrothermal Discharge Along The Cleft Segment, Juan de Fuca Ridge
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批准号:2052453
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项目类别:Continuing Grant
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资助金额:$36.41万
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财政年份:2021
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Investigating the Source and Flux of Dissolved Organic Carbon Released from Methane Seeps to the Deep-ocean
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批准号:2048357
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项目类别:Standard Grant
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资助金额:$44.89万
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财政年份:2021
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Investigating the Fate of Carbon at an Ultraslow Spreading Center
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批准号:1801205
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项目类别:Standard Grant
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资助金额:$31.35万
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财政年份:2019
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Characterization of Subduction Channel Processes - Borehole Sampling at Active Serpentinite Mud Volcanoes on the Mariana Forearc
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批准号:1921361
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项目类别:Continuing Grant
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资助金额:$32.53万
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财政年份:2019
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负责人:Jeffrey Seewald
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依托单位:
Collborative Research: Laboratory Investigation of Redox Reactions during Subsurface Mixing in Submarine Hydrothermal Systems
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批准号:1558750
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项目类别:Standard Grant
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资助金额:$37.78万
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财政年份:2016
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Ecosystem dynamics of Western Pacific hydrothermal vent communities associated with polymetallic sulfide deposits
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批准号:1536331
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项目类别:Standard Grant
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资助金额:$36.08万
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财政年份:2015
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Geochemical Effects on the Functional Microbial Community Dynamics of Hydrothermal Deposits along the Eastern Lau Spreading Center
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批准号:1233037
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项目类别:Standard Grant
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资助金额:$23.84万
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财政年份:2012
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Integrating Subsurface Processes across Spatial and Temporal Scales - a Holistic Analysis of Vent Fluid Chemistry at the Lau Back-Arc Spreading Center
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批准号:1038124
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项目类别:Standard Grant
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资助金额:$12.77万
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财政年份:2010
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负责人:Jeffrey Seewald
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依托单位:
Sources of Organic Compounds in Submarine Hot-Springs: An Experimental Investigation
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批准号:0647800
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:2007
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负责人:Jeffrey Seewald
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依托单位:
RUI Collaborative Research: Experimental Investigation of Fluid-Rock Interaction in Back-Arc Environments
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批准号:0732478
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项目类别:Standard Grant
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资助金额:$17.99万
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财政年份:2007
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Borehole Studies of ODP Site 1200, South Chamorro Seamount: A Window into Active Serpentinite Mud Volcanism
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批准号:0725204
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项目类别:Standard Grant
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资助金额:$12.28万
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财政年份:2007
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负责人:Jeffrey Seewald
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依托单位:
Collaborative Research: Organic Geochemical Investigation of the Rainbow Hydrothermal System, Mid-Atlantic Ridge
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批准号:0549829
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项目类别:Continuing Grant
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资助金额:$0.0万
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财政年份:2006
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负责人:Jeffrey Seewald
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依托单位:
Controls on the Abundance of Carbon Species in Unsedimented Submarine Hydrothermal Systems: An Experimental Investigation
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批准号:0136954
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项目类别:Standard Grant
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资助金额:$28.78万
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财政年份:2002
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负责人:Jeffrey Seewald
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依托单位:
Controls on the Distribution of Organic Species in Marine Subsurface Environments
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批准号:9618179
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项目类别:Continuing Grant
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资助金额:$26.55万
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财政年份:1997
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负责人:Jeffrey Seewald
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依托单位:
Hydrothermal Sediment Alteration at Oceanic Spreading Centers: A Comparison of Thermogenic Organic Reactions in Laboratory and Natural Systems
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批准号:9116537
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项目类别:Continuing Grant
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资助金额:$24.33万
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财政年份:1991
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负责人:Jeffrey Seewald
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依托单位:
海外基金