Surface Chemistry and Reactivity of Metastable Iron SulfidesUnder Anoxic Marine Conditions

缺氧海洋条件下亚稳态硫化铁的表面化学和反应活性

• 批准号: 9115175
• 负责人: John Morse
• 金额: $ 32万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-12-01 至 1996-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115175&HistoricalAwards=false
• 关键词: Surface; Chemistry; Reactivity; Metastable; Iron

Research on the factors controlling the formation and abundance of sulfide minerals, and associated trace metal behavior, in a variety of modern and ancient environments has established that many trace metals are extensively pyritized during early diagenesis. Additionally, studies have defined the interaction of metals with the surface of pyrite and the coprecipitation of metals with mackinawite. The primary objectives of this research are 1) to experimentally resolve the perplexing problem of how framboidal pyrite forms and 2) to study the coprecipitation of trace metals with this phase. A variety of techniques will be used to attack this problem that include long-term gel growth methods, and use of both "synthetic" and natural sediments.

对各种现代和古代环境中控制硫化物矿物形成和丰度的因素以及相关微量金属行为的研究表明，许多微量金属在早期成岩作用过程中广泛黄铁矿化。 此外，研究还确定了金属与黄铁矿表面的相互作用以及金属与麦基纳矿的共沉淀。 本研究的主要目标是 1) 通过实验解决草莓状黄铁矿如何形成的复杂问题，2) 研究痕量金属与该相的共沉淀。 将使用多种技术来解决这个问题，包括长期凝胶生长方法以及使用“合成”和天然沉积物。