Use of Natural Variations in Silicon Isotopes to Study the Cycling of Biogenic Silica

利用硅同位素的自然变化研究生物二氧化硅的循环

• 批准号: 9216295
• 负责人: Michael DeNiro
• 金额: $ 18.72万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-04-01 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9216295&HistoricalAwards=false
• 关键词: Use; Natural; Variations; Silicon; Isotopes

The few available data suggest that silicon isotopes are fractionated during the production of opal by marine diatoms. Variations in silicon isotope ratios will be used to study diatom production and silica cycling in the ocean. A laser-based system will be used for determining silicon isotope ratios in inorganic and biogenic silicon-bearing phases to evaluate the utility of this approach by determining the fractionation factors for silica biomineralization and dissolution using cultures of Antarctic and temperature diatom species.

少数可用数据表明，硅同位素在海洋硅藻生产蛋白石的过程中发生了分馏。 硅同位素比率的变化将用于研究海洋中的硅藻生产和二氧化硅循环。 基于激光的系统将用于确定无机和生物含硅相中的硅同位素比率，通过使用南极和温度硅藻物种的培养物确定二氧化硅生物矿化和溶解的分馏因子来评估该方法的实用性。