Serpentinization of Oceanic Peridotites: A Geochemical and Isotopic Study

大洋橄榄岩的蛇纹石化：地球化学和同位素研究

• 批准号: 9986135
• 负责人: Susan Humphris
• 金额: $ 26.1万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986135&HistoricalAwards=false
• 关键词: Serpentinization; Oceanic; Peridotites; Geochemical; Isotopic

Award is for documenting the sequences of reactions, temperatures, and nature and chemistry of fluids that are associated with the formation of sepentinite during hydrothermal alteration of oceanic peridotite at slow spreading ridges. A principle goal is the quantitative evaluation of imperfectly understood, yet is critical for evaluation of global geochemical fluxes, and the influence these fluxes and alteration processes have on the physical and chemical properties of oceanic lithosphere. These fluxes also exert fundamental control on biotic communities associated with this lithosphere, especially at oceanic ridges. The proposed work involves a comprehensive and this lithosphere, expecially at oceanic ridges. The proposed work involves a comprehensive and systematic study of dredged and drilled peridotic exhibiting varying amounts of alteration. This study will include detailed mineralogical analysis, including analyzing geochemical and isotopic compositions of individual minerals to infer bulk sample geochemistry.

该奖项是为了记录在缓慢扩张的海脊上大洋橄榄岩的热液蚀变过程中，与形成相间硅质岩有关的反应、温度以及流体的性质和化学的顺序。一个主要目标是对尚未完全了解的地球物理和化学性质进行定量评估，但这对于评估全球地球化学通量以及这些通量和蚀变过程对大洋岩石圈物理和化学性质的影响至关重要。这些通量也对与岩石圈有关的生物群落起着基本的控制作用，特别是在大洋海脊。拟议的工作涉及一项全面的岩石圈，特别是大洋海脊的岩石圈。拟议的工作涉及对挖掘和钻探的周牙石进行全面和系统的研究，显示出不同程度的蚀变。这项研究将包括详细的矿物学分析，包括分析单个矿物的地球化学和同位素组成，以推断大样本地球化学。