Mechanisms of proxy uptake in biominerals

生物矿物质的代理吸收机制

• 批准号: DP160102081
• 负责人: Prof Dorrit Jacob
• 金额: $ 24.28万
• 依托单位: The Australian National University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2016
• 资助国家: 澳大利亚
• 起止时间: 2016-05-23 至 2023-05-22
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP160102081
• 关键词: Mechanisms; proxy; uptake; biominerals

This project plans to combine nano-analytical and aquaculture methods to develop new models that improve the reliability of paleoclimate reconstructions. The compositions of shells and skeletal materials of marine invertebrates are essential archives for quantifying temperatures and environmental conditions before modern climate records began. However, their reliability relies on understanding their formation. Emerging knowledge from material sciences indicates that these biocarbonates form via transient precursors rather than direct precipitation from seawater, profoundly affecting their interpretation. This project plans to transfer this new understanding to the earth sciences using nanoscale analytical methods including in vitro geochemical partitioning experiments. This would enable realistic models for geochemical proxy behaviour to be developed, significantly improving paleoclimate interpretations and assessments of ocean acidification effects on marine calcifiers.

该项目计划将联合收割机纳米分析和水产养殖方法结合起来，开发新的模型，提高古气候重建的可靠性。在现代气候记录开始之前，海洋无脊椎动物的贝壳和骨骼材料的组成是量化温度和环境条件的重要档案。然而，它们的可靠性依赖于对其形成的理解。来自材料科学的新知识表明，这些生物碳酸盐是通过瞬态前体而不是从海水中直接沉淀形成的，这深刻地影响了它们的解释。该项目计划将这一新的认识转移到地球科学使用纳米分析方法，包括在体外地球化学分配实验。这将有助于开发地球化学代用行为的现实模型，大大改善古气候解释和海洋酸化对海洋钙化物影响的评估。