Microstructure in Modern Marine Stromatolites: A Geomicrobiological Investigation of Processes Forming Lithified Micritic Laminae

现代海洋叠层石的微观结构：岩化微晶层形成过程的地球微生物学研究

• 批准号: 9617738
• 负责人: Alan Decho
• 金额: $ 14.41万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-11-01 至 1999-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617738&HistoricalAwards=false
• 关键词: Microstructure; Modern; Marine; Stromatolites; Geomicrobiological

This project will determine the origin of microcrystalline carbonate in stromatolites: is it precipitation resulting from bacterial metabolic activity, or physical trapping of resuspended particles? Crusting and "soft" mats from Exuma Cays, Bahamas, will be compared, with experimental intervention to encourage or inhibit lithification. Analyses will include structure and mineralogy of grains, structure of microbe community, mat physiology, and biogeochemistry of stable isotopes and extracellular secretions.

该项目将确定叠层石中微晶碳酸盐的来源：是细菌代谢活动引起的沉淀，还是再悬浮颗粒的物理捕获？来自巴哈马Exuma Cays的结皮和柔软的垫子将与鼓励或抑制结石形成的实验干预进行比较。分析将包括谷物的结构和矿物学，微生物群落的结构，垫子生理学，以及稳定同位素和胞外分泌物的生物地球化学。