Diagenetic Processes and Authigenic Mineral Formation in Amazon Shelf Sediments

本研究将：（1）全面分析季节性收集的 样品和活塞芯，旨在记录物理， 控制成岩反应的生物和化学因素 陆棚相反应的优势度和速率，（2）利用C1 和氟里昂剖面，以量化成岩迁移机制， 平均盐度边界条件;（3）利用大面积区域 铁矿物的形成和转化;（4）确定， 结合水柱研究，广泛的影响， 大陆架底部沉积物中富铁红土碎屑的减少 微量溶质（如U、Se、As）向内部的迁移 （5）记录地球化学和相关的底栖生物 这些环境的生物指标可能会被记录下来 岩石记录中;和（6）检查和评估可能的 亚马逊大陆架和古环境之间的相似之处 铁矿物沉积 多学科融合将是 重点介绍

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.