摘要
^32Si是一种宇生放射性核素，半衰期约150年。由于其来源单一、生产速率相对恒定，并具有与稳定硅相同的化学和生物特性，一直被视为研究50～1000年尺度海洋过程的一个理想的计时钟和示踪剂。本文介绍了^32Si在海洋学的应用，主要包括示踪近岸和大洋水体的混合，河口和大洋中硅的地球化学行为和循环，深海海底颗粒物的混合，及利用其计算沉积速率／混合速率，建立年代序列来反映环境变化的信息。
The isotope silicon-32, with a half-life of approximately 150 years, is a cosmic-ray-produced radioactive nuclide in the atmosphere. Due to its single source and the relatively constant production rate, silicon-32 with its chemical and biological characteristics like the other stable silicon isotopes always has been seen as an ideal clock and tracer which has the potential to fill the dating time-gap and to understand marine from 50 to 1 000 years geochemical-geophysical processes, e.g. the seawater mixing process in offshore and ocean, the geochemistry and cycle of silica in estuary and ocean, the particles mixing process in the deep sea bed, as well as the estimation of the sediment deposition rate and the establishment of the time-sequence to reflect the past marine environmental changes.
出处
《同位素》
CAS
2015年第1期7-19,共13页
Journal of Isotopes
基金
国家海洋公益性行业科研专项项目(201105003)
关键词
^32Si
宇生放射性核素
示踪剂
海洋过程
silicon-32
cosmic-ray-produced radioactive nuclide
tracer
ocean processes
