Pyrite: a deep-time capsule of ocean chemistry and atmosphere oxidation

黄铁矿：海洋化学和大气氧化的深层胶囊

• 批准号: DP150102578
• 负责人: Prof Ross Large
• 金额: $ 33.18万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2015
• 资助国家: 澳大利亚
• 起止时间: 2015-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP150102578
• 关键词: Pyrite; deep; time; capsule; ocean

Surprisingly little is known about trace element trends in past oceans, even though these data are vital for interpreting the evolution of the Earth's atmosphere, evolutionary pathways of marine life and cycles of major mineral deposits. Using laser-based analysis of sedimentary pyrite in deep marine rocks, this project aims to produce, for the first time, temporal variation curves for 25 trace elements in seawater over the last 3.5 billion years. Preliminary research has validated the technique and demonstrated major changes in certain trace elements over geologically short periods. Outcomes will assist the minerals industry in the discovery of new deposits of zinc, copper, gold and iron ore in Australia.

令人惊讶的是，人们对过去海洋中微量元素的趋势知之甚少，尽管这些数据对于解释地球大气层的演变、海洋生物的进化途径和主要矿床的周期至关重要。利用深海岩石中沉积黄铁矿的激光分析，该项目旨在首次制作过去35亿年海水中25种微量元素的时间变化曲线。初步研究证实了该技术的有效性，并证明了某些微量元素在地质学上的短期内发生了重大变化。其成果将有助于矿业在澳大利亚发现新的锌、铜、金和铁矿石矿床。