Physical and chemical structure of freshwater ferromanganese nodules

淡水锰铁结核的物理和化学结构

• 批准号: 194091-2011
• 负责人: Al, Tom
• 金额: $ 2.4万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=593679
• 关键词: Physical; chemical; structure; freshwater; ferromanganese

The research will focus on freshwater ferromanganese nodules which can be found in many lakes throughout Canada. These nodules occur on the sediment in the lake and grow slowly over hundreds to thousands of years by the continuous accumulation of iron- and manganese-oxide layers. Radiometric age dating indicates that some nodules may be as old as the lakes in which they grow - in some cases up to 10,000 years old. They appear to grow in a roughly concentric manner around a pebble nucleus, and, similar to growth rings in a tree trunk, they could contain a time series record of aquatic-chemical and climate conditions over much of the Holocene (the past 12,000 years). The objective of this research proposal is to develop methods to measure chemical and isotopic composition profiles in order to provide a historical record of aquatic-chemical and climate conditions.

这项研究将集中于淡水铁龙就是结节，这些结节可以在加拿大的许多湖泊中找到。这些结节出现在湖中的沉积物上，并通过铁 - 和锰氧化物层的连续积累来缓慢生长以上数百万到数千年。辐射年龄的年龄表明，某些结节可能与它们生长的湖泊一样古老 - 在某些情况下，最高可达10，000年。它们似乎在卵石核周围以大致同心的方式生长，并且类似于树干中的生长环，它们可以在许多全新世（过去12，000年）中包含水生化学和气候条件的时间序列记录。该研究建议的目的是开发测量化学和同位素组成谱的方法，以提供水生化学和气候条件的历史记录。