Diagenetic Processes and Authigenic Mineral Formation in Amazon Shelf Sediments

亚马逊陆架沉积物中的成岩过程和自生矿物形成

• 批准号: 9115709
• 负责人: Robert Aller
• 金额: $ 20.6万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115709&HistoricalAwards=false
• 关键词: Diagenetic; Processes; Authigenic; Mineral; Formation

This study will: (1) complete analysis of seasonally collected samples and piston cores, designed to document physical, biological, and chemical factors controlling diagenetic reaction dominance and rates of reactions in shelf facies, (2) utilize C1 and freon profiles to quantify diagenetic transport mechanisms and mean salinity boundary conditions, (3) exploit the extensive zones of Fe-mineral formation and transformation; (4) determine, in conjunction with water column studies, the influence of extensive reduction of Fe-rich lateritic debris in shelf bottom sediments on the transport of minor solutes (e.g. U, Se, As) to the interior ocean; (5) document the geochemical and associated benthic biological indicators of these environments likely to be recorded in the rock record; and (6) examine and evaluate possible similarities between the Amazon shelf and ancient environments of iron mineral deposition. Multidisciplinary integration will be emphasized.

这项研究将：(1)对季节性采集的样品和活塞芯进行完整的分析，以记录控制陆架相成岩反应优势和反应速率的物理、生物和化学因素；(2)利用C1和氟里昂剖面量化成岩搬运机制和平均盐度边界条件；(3)开发广泛的铁矿物形成和转化带；(4)结合水柱研究，确定陆架底部沉积物中富铁红土碎屑的广泛还原对少量溶质(如U、Se、As)向海洋内部输送的影响；(5)记录岩石记录中可能记录的这些环境的地球化学和相关的底栖生物指标；以及(6)检查和评估亚马逊陆架和古代铁矿物质沉积环境之间可能的相似性。将强调多学科融合。