Effects of microbial versus inorganic processes on the geochemistry of sulfur during seawater alteration of oceanic lithosphere

海洋岩石圈海水蚀变过程中微生物与无机过程对硫地球化学的影响

• 批准号: 0424558
• 负责人: Jeffrey Alt
• 金额: $ 15.75万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0424558&HistoricalAwards=false
• 关键词: Effects; microbial; versus; inorganic; processes

It is proposed to investigate the geochemistry of sulfur in a section of upper oceanic crust generated at a fast spreading rate, as sampled by ODP Leg 206 at Site 1256. Three hypotheses will be tested: (1) that there is a net addition of sulfur to uppermost oceanic crust formed at fast spreading rates and having moderate sedimentation rates, in contrast to the net loss of sulfur from upper crust formed at slow and intermediate rates, (2) that biological activity is important in the fixation of sulfur in the upper ocean crust, and (3) alternatives to the microbial hypothesis involving inorganic processes.

建议研究以快速扩张速度产生的洋壳上部的硫的地球化学，这是由ODP206在1256站采样的。将检验三个假设：(1)以快速扩张速度形成并具有中等沉积速度的最上层洋壳存在硫的净添加，而不是以慢速和中速形成的上层地壳硫的净损失；(2)生物活动对于固定上层洋壳中的硫是重要的；以及(3)涉及无机过程的微生物假说的替代方案。