Marine Geochemical Studies with Beryllium and U-Th Series Isotopes

铍的地球化学研究将继续进行 其中包括对气溶胶、雨水、空气中Be同位素的研究 海洋、河流和河口沃茨及其颗粒物， 和海洋沉积物中。 将特别注意： 确定同位素的分布和程度 深海中10 Be/9 Be的均匀化， ~ 7 Be/~（10）Be比值作为海洋过程的示踪剂，探讨了海洋环境中的 使用孔隙水9 Be作为标准化参数， ~（10）Be地质年代学与非稳态元素研究 7 Be/10 Be多种示踪剂在海洋表层的迁移， U/Th系列同位素。 计划的实地收集包括水 柱10 Be/9 Be研究。大西洋，大气7 Be/10 Be 洛杉矶的Be和U-Th系列同位素研究， 加州南部的圣佩德罗盆地。 该项目旨在 对地球化学行为的理解， 铍的同位素分布（10 Be、9 Be和7 Be） 在海洋-大气系统中。 这样的理解将 提供洞察力，并促进这些同位素的使用， 一些海洋学和地球物理问题的示踪剂 例如过去15年海洋沉积物的地质年代学 百万年，海洋混合，微粒通量，微量元素 扫气、宇宙线变化和地磁场 强度。

Geochemical investigations of beryllium will be continued that include studies of Be isotopes in aerosols, in rain, in ocean, river and estuarine waters and their particulate matter, and in marine deposits. Particular attention will be paid to: determining the distribution and degree of isotopic homogenization of 10Be/9Be in the deep ocean, evaluating the 7Be/10Be ratio as a tracer of oceanic process, exploring the use of pore water 9Be as an normalization parameter for the 10Be geochronometry, and studying non-steady state elemental removal in surface ocean with multiple tracers of 7Be/10Be and U/Th series isotopes. Planned field collections include water column 10Be/9Be study in the S. Atlantic, atmospheric 7Be/10Be study in Los Angeles, and Be and U-Th series isotope study in the San Pedro Basin off Southern California. This project aims at gaining an understanding of the geochemical behavior and distribution of the isotopes of beryllium (10Be, 9Be, and 7Be) in the ocean-atmospheric system. Such an understanding will provide insight and facilitate the use of these isotopes as tracers for a number of oceanographic and geophysical problems such as geochronology of marine deposits for the past 15 million years, ocean mixing, particulate flux, trace element scavenging, variation of cosmic-ray and geomagnetic field intensity.